From 479b652a56a40adb4004db4ff38fc18f75715823 Mon Sep 17 00:00:00 2001
From: Alex Pott <alex.a.pott@googlemail.com>
Date: Tue, 25 Feb 2020 17:03:40 +0000
Subject: [PATCH] Issue #3108402 by lauriii, bnjmnm, FezVrasta, Wim Leers,
mradcliffe, gisle: Update to Popper.js to 2.0.0
---
core/.eslintignore | 2 +
.../es6-promise/es6-promise.auto.min.js | 1 +
core/assets/vendor/popperjs/popper.min.js | 9 +-
core/assets/vendor/popperjs/popper.min.js.map | 2 +-
core/core.libraries.yml | 27 +++++-
core/misc/polyfills/array.find.es6.js | 60 +++++++++++++
core/misc/polyfills/array.find.js | 40 +++++++++
core/misc/polyfills/object.assign.es6.js | 41 +++++++++
core/misc/polyfills/object.assign.js | 36 ++++++++
.../QuickEditImageTest.php | 9 ++
.../js/views/EntityToolbarView.es6.js | 88 +++++++++----------
.../quickedit/js/views/EntityToolbarView.js | 70 +++++++--------
.../QuickEditFileTest.php | 9 ++
.../QuickEditIntegrationTest.php | 9 ++
.../QuickEditLoadingTest.php | 9 ++
15 files changed, 320 insertions(+), 92 deletions(-)
create mode 100644 core/assets/vendor/es6-promise/es6-promise.auto.min.js
create mode 100644 core/misc/polyfills/array.find.es6.js
create mode 100644 core/misc/polyfills/array.find.js
create mode 100644 core/misc/polyfills/object.assign.es6.js
create mode 100644 core/misc/polyfills/object.assign.js
diff --git a/core/.eslintignore b/core/.eslintignore
index 21c8a024f75d..52972ceb70b0 100644
--- a/core/.eslintignore
+++ b/core/.eslintignore
@@ -5,3 +5,5 @@ node_modules/**/*
!*.es6.js
modules/locale/tests/locale_test.es6.js
!tests/Drupal/Nightwatch/**/*.js
+misc/polyfills/array.find.es6.js
+misc/polyfills/object.assign.es6.js
diff --git a/core/assets/vendor/es6-promise/es6-promise.auto.min.js b/core/assets/vendor/es6-promise/es6-promise.auto.min.js
new file mode 100644
index 000000000000..1a322ddd01bc
--- /dev/null
+++ b/core/assets/vendor/es6-promise/es6-promise.auto.min.js
@@ -0,0 +1 @@
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.ES6Promise=e()}(this,function(){"use strict";function t(t){var e=typeof t;return null!==t&&("object"===e||"function"===e)}function e(t){return"function"==typeof t}function n(t){W=t}function r(t){z=t}function o(){return function(){return process.nextTick(a)}}function i(){return"undefined"!=typeof U?function(){U(a)}:c()}function s(){var t=0,e=new H(a),n=document.createTextNode("");return e.observe(n,{characterData:!0}),function(){n.data=t=++t%2}}function u(){var t=new MessageChannel;return t.port1.onmessage=a,function(){return t.port2.postMessage(0)}}function c(){var t=setTimeout;return function(){return t(a,1)}}function a(){for(var t=0;t<N;t+=2){var e=Q[t],n=Q[t+1];e(n),Q[t]=void 0,Q[t+1]=void 0}N=0}function f(){try{var t=Function("return this")().require("vertx");return U=t.runOnLoop||t.runOnContext,i()}catch(e){return c()}}function l(t,e){var n=this,r=new this.constructor(p);void 0===r[V]&&x(r);var o=n._state;if(o){var i=arguments[o-1];z(function(){return T(o,r,i,n._result)})}else j(n,r,t,e);return r}function h(t){var e=this;if(t&&"object"==typeof t&&t.constructor===e)return t;var n=new e(p);return w(n,t),n}function p(){}function v(){return new TypeError("You cannot resolve a promise with itself")}function d(){return new TypeError("A promises callback cannot return that same promise.")}function _(t,e,n,r){try{t.call(e,n,r)}catch(o){return o}}function y(t,e,n){z(function(t){var r=!1,o=_(n,e,function(n){r||(r=!0,e!==n?w(t,n):A(t,n))},function(e){r||(r=!0,S(t,e))},"Settle: "+(t._label||" unknown promise"));!r&&o&&(r=!0,S(t,o))},t)}function m(t,e){e._state===Z?A(t,e._result):e._state===$?S(t,e._result):j(e,void 0,function(e){return w(t,e)},function(e){return S(t,e)})}function b(t,n,r){n.constructor===t.constructor&&r===l&&n.constructor.resolve===h?m(t,n):void 0===r?A(t,n):e(r)?y(t,n,r):A(t,n)}function 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diff --git a/core/assets/vendor/popperjs/popper.min.js b/core/assets/vendor/popperjs/popper.min.js
index 8a17212f7dba..3f2c4e802ce7 100644
--- a/core/assets/vendor/popperjs/popper.min.js
+++ b/core/assets/vendor/popperjs/popper.min.js
@@ -1,5 +1,6 @@
-/*
- Copyright (C) Federico Zivolo 2019
- Distributed under the MIT License (license terms are at http://opensource.org/licenses/MIT).
- */(function(e,t){'object'==typeof exports&&'undefined'!=typeof module?module.exports=t():'function'==typeof define&&define.amd?define(t):e.Popper=t()})(this,function(){'use strict';function e(e){return e&&'[object Function]'==={}.toString.call(e)}function t(e,t){if(1!==e.nodeType)return[];var o=e.ownerDocument.defaultView,n=o.getComputedStyle(e,null);return t?n[t]:n}function o(e){return'HTML'===e.nodeName?e:e.parentNode||e.host}function n(e){if(!e)return document.body;switch(e.nodeName){case'HTML':case'BODY':return e.ownerDocument.body;case'#document':return e.body;}var i=t(e),r=i.overflow,p=i.overflowX,s=i.overflowY;return /(auto|scroll|overlay)/.test(r+s+p)?e:n(o(e))}function i(e){return e&&e.referenceNode?e.referenceNode:e}function r(e){return 11===e?re:10===e?pe:re||pe}function p(e){if(!e)return document.documentElement;for(var o=r(10)?document.body:null,n=e.offsetParent||null;n===o&&e.nextElementSibling;)n=(e=e.nextElementSibling).offsetParent;var i=n&&n.nodeName;return 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e},s=r(i.width),d=r(n.width),a=-1!==['left','right'].indexOf(e.placement),l=-1!==e.placement.indexOf('-'),f=t?a||l||s%2==d%2?r:Z:p,m=t?r:p;return{left:f(1==s%2&&1==d%2&&!l&&t?n.left-1:n.left),top:m(n.top),bottom:m(n.bottom),right:f(n.right)}}function K(e,t,o){var n=D(e,function(e){var o=e.name;return o===t}),i=!!n&&e.some(function(e){return e.name===o&&e.enabled&&e.order<n.order});if(!i){var r='`'+t+'`';console.warn('`'+o+'`'+' modifier is required by '+r+' modifier in order to work, be sure to include it before '+r+'!')}return i}function z(e){return'end'===e?'start':'start'===e?'end':e}function G(e){var t=1<arguments.length&&void 0!==arguments[1]&&arguments[1],o=he.indexOf(e),n=he.slice(o+1).concat(he.slice(0,o));return t?n.reverse():n}function _(e,t,o,n){var i=e.match(/((?:\-|\+)?\d*\.?\d*)(.*)/),r=+i[1],p=i[2];if(!r)return e;if(0===p.indexOf('%')){var s;switch(p){case'%p':s=o;break;case'%':case'%r':default:s=n;}var d=g(s);return d[t]/100*r}if('vh'===p||'vw'===p){var a;return 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o,n=t.offset,i=e.placement,r=e.offsets,p=r.popper,s=r.reference,d=i.split('-')[0];return o=Y(+n)?[+n,0]:X(n,p,s,d),'left'===d?(p.top+=o[0],p.left-=o[1]):'right'===d?(p.top+=o[0],p.left+=o[1]):'top'===d?(p.left+=o[0],p.top-=o[1]):'bottom'===d&&(p.left+=o[0],p.top+=o[1]),e.popper=p,e}var Q=Math.min,Z=Math.floor,$=Math.round,ee=Math.max,te='undefined'!=typeof window&&'undefined'!=typeof document&&'undefined'!=typeof navigator,oe=function(){for(var e=['Edge','Trident','Firefox'],t=0;t<e.length;t+=1)if(te&&0<=navigator.userAgent.indexOf(e[t]))return 1;return 0}(),ne=te&&window.Promise,ie=ne?function(e){var t=!1;return function(){t||(t=!0,window.Promise.resolve().then(function(){t=!1,e()}))}}:function(e){var t=!1;return function(){t||(t=!0,setTimeout(function(){t=!1,e()},oe))}},re=te&&!!(window.MSInputMethodContext&&document.documentMode),pe=te&&/MSIE 10/.test(navigator.userAgent),se=function(e,t){if(!(e instanceof t))throw new TypeError('Cannot call a class as a function')},de=function(){function e(e,t){for(var o,n=0;n<t.length;n++)o=t[n],o.enumerable=o.enumerable||!1,o.configurable=!0,'value'in o&&(o.writable=!0),Object.defineProperty(e,o.key,o)}return function(t,o,n){return o&&e(t.prototype,o),n&&e(t,n),t}}(),ae=function(e,t,o){return t in e?Object.defineProperty(e,t,{value:o,enumerable:!0,configurable:!0,writable:!0}):e[t]=o,e},le=Object.assign||function(e){for(var t,o=1;o<arguments.length;o++)for(var n in t=arguments[o],t)Object.prototype.hasOwnProperty.call(t,n)&&(e[n]=t[n]);return e},fe=te&&/Firefox/i.test(navigator.userAgent),me=['auto-start','auto','auto-end','top-start','top','top-end','right-start','right','right-end','bottom-end','bottom','bottom-start','left-end','left','left-start'],he=me.slice(3),ce={FLIP:'flip',CLOCKWISE:'clockwise',COUNTERCLOCKWISE:'counterclockwise'},ge=function(){function t(o,n){var i=this,r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:{};se(this,t),this.scheduleUpdate=function(){return 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I.call(this)}},{key:'disableEventListeners',value:function(){return U.call(this)}}]),t}();return ge.Utils=('undefined'==typeof window?global:window).PopperUtils,ge.placements=me,ge.Defaults={placement:'bottom',positionFixed:!1,eventsEnabled:!0,removeOnDestroy:!1,onCreate:function(){},onUpdate:function(){},modifiers:{shift:{order:100,enabled:!0,fn:function(e){var t=e.placement,o=t.split('-')[0],n=t.split('-')[1];if(n){var i=e.offsets,r=i.reference,p=i.popper,s=-1!==['bottom','top'].indexOf(o),d=s?'left':'top',a=s?'width':'height',l={start:ae({},d,r[d]),end:ae({},d,r[d]+r[a]-p[a])};e.offsets.popper=le({},p,l[n])}return e}},offset:{order:200,enabled:!0,fn:J,offset:0},preventOverflow:{order:300,enabled:!0,fn:function(e,t){var o=t.boundariesElement||p(e.instance.popper);e.instance.reference===o&&(o=p(o));var n=B('transform'),i=e.instance.popper.style,r=i.top,s=i.left,d=i[n];i.top='',i.left='',i[n]='';var a=v(e.instance.popper,e.instance.reference,t.padding,o,e.positionFixed);i.top=r,i.left=s,i[n]=d,t.boundaries=a;var l=t.priority,f=e.offsets.popper,m={primary:function(e){var o=f[e];return f[e]<a[e]&&!t.escapeWithReference&&(o=ee(f[e],a[e])),ae({},e,o)},secondary:function(e){var o='right'===e?'left':'top',n=f[o];return f[e]>a[e]&&!t.escapeWithReference&&(n=Q(f[o],a[e]-('right'===e?f.width:f.height))),ae({},o,n)}};return l.forEach(function(e){var t=-1===['left','top'].indexOf(e)?'secondary':'primary';f=le({},f,m[t](e))}),e.offsets.popper=f,e},priority:['left','right','top','bottom'],padding:5,boundariesElement:'scrollParent'},keepTogether:{order:400,enabled:!0,fn:function(e){var t=e.offsets,o=t.popper,n=t.reference,i=e.placement.split('-')[0],r=Z,p=-1!==['top','bottom'].indexOf(i),s=p?'right':'bottom',d=p?'left':'top',a=p?'width':'height';return o[s]<r(n[d])&&(e.offsets.popper[d]=r(n[d])-o[a]),o[d]>r(n[s])&&(e.offsets.popper[d]=r(n[s])),e}},arrow:{order:500,enabled:!0,fn:function(e,o){var n;if(!K(e.instance.modifiers,'arrow','keepTogether'))return e;var i=o.element;if('string'==typeof i){if(i=e.instance.popper.querySelector(i),!i)return e;}else if(!e.instance.popper.contains(i))return console.warn('WARNING: `arrow.element` must be child of its popper element!'),e;var r=e.placement.split('-')[0],p=e.offsets,s=p.popper,d=p.reference,a=-1!==['left','right'].indexOf(r),l=a?'height':'width',f=a?'Top':'Left',m=f.toLowerCase(),h=a?'left':'top',c=a?'bottom':'right',u=S(i)[l];d[c]-u<s[m]&&(e.offsets.popper[m]-=s[m]-(d[c]-u)),d[m]+u>s[c]&&(e.offsets.popper[m]+=d[m]+u-s[c]),e.offsets.popper=g(e.offsets.popper);var b=d[m]+d[l]/2-u/2,w=t(e.instance.popper),y=parseFloat(w['margin'+f],10),E=parseFloat(w['border'+f+'Width'],10),v=b-e.offsets.popper[m]-y-E;return v=ee(Q(s[l]-u,v),0),e.arrowElement=i,e.offsets.arrow=(n={},ae(n,m,$(v)),ae(n,h,''),n),e},element:'[x-arrow]'},flip:{order:600,enabled:!0,fn:function(e,t){if(W(e.instance.modifiers,'inner'))return e;if(e.flipped&&e.placement===e.originalPlacement)return e;var o=v(e.instance.popper,e.instance.reference,t.padding,t.boundariesElement,e.positionFixed),n=e.placement.split('-')[0],i=T(n),r=e.placement.split('-')[1]||'',p=[];switch(t.behavior){case ce.FLIP:p=[n,i];break;case ce.CLOCKWISE:p=G(n);break;case ce.COUNTERCLOCKWISE:p=G(n,!0);break;default:p=t.behavior;}return p.forEach(function(s,d){if(n!==s||p.length===d+1)return e;n=e.placement.split('-')[0],i=T(n);var a=e.offsets.popper,l=e.offsets.reference,f=Z,m='left'===n&&f(a.right)>f(l.left)||'right'===n&&f(a.left)<f(l.right)||'top'===n&&f(a.bottom)>f(l.top)||'bottom'===n&&f(a.top)<f(l.bottom),h=f(a.left)<f(o.left),c=f(a.right)>f(o.right),g=f(a.top)<f(o.top),u=f(a.bottom)>f(o.bottom),b='left'===n&&h||'right'===n&&c||'top'===n&&g||'bottom'===n&&u,w=-1!==['top','bottom'].indexOf(n),y=!!t.flipVariations&&(w&&'start'===r&&h||w&&'end'===r&&c||!w&&'start'===r&&g||!w&&'end'===r&&u),E=!!t.flipVariationsByContent&&(w&&'start'===r&&c||w&&'end'===r&&h||!w&&'start'===r&&u||!w&&'end'===r&&g),v=y||E;(m||b||v)&&(e.flipped=!0,(m||b)&&(n=p[d+1]),v&&(r=z(r)),e.placement=n+(r?'-'+r:''),e.offsets.popper=le({},e.offsets.popper,C(e.instance.popper,e.offsets.reference,e.placement)),e=P(e.instance.modifiers,e,'flip'))}),e},behavior:'flip',padding:5,boundariesElement:'viewport',flipVariations:!1,flipVariationsByContent:!1},inner:{order:700,enabled:!1,fn:function(e){var t=e.placement,o=t.split('-')[0],n=e.offsets,i=n.popper,r=n.reference,p=-1!==['left','right'].indexOf(o),s=-1===['top','left'].indexOf(o);return i[p?'left':'top']=r[o]-(s?i[p?'width':'height']:0),e.placement=T(t),e.offsets.popper=g(i),e}},hide:{order:800,enabled:!0,fn:function(e){if(!K(e.instance.modifiers,'hide','preventOverflow'))return e;var t=e.offsets.reference,o=D(e.instance.modifiers,function(e){return'preventOverflow'===e.name}).boundaries;if(t.bottom<o.top||t.left>o.right||t.top>o.bottom||t.right<o.left){if(!0===e.hide)return e;e.hide=!0,e.attributes['x-out-of-boundaries']=''}else{if(!1===e.hide)return e;e.hide=!1,e.attributes['x-out-of-boundaries']=!1}return e}},computeStyle:{order:850,enabled:!0,fn:function(e,t){var o=t.x,n=t.y,i=e.offsets.popper,r=D(e.instance.modifiers,function(e){return'applyStyle'===e.name}).gpuAcceleration;void 0!==r&&console.warn('WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!');var s,d,a=void 0===r?t.gpuAcceleration:r,l=p(e.instance.popper),f=u(l),m={position:i.position},h=q(e,2>window.devicePixelRatio||!fe),c='bottom'===o?'top':'bottom',g='right'===n?'left':'right',b=B('transform');if(d='bottom'==c?'HTML'===l.nodeName?-l.clientHeight+h.bottom:-f.height+h.bottom:h.top,s='right'==g?'HTML'===l.nodeName?-l.clientWidth+h.right:-f.width+h.right:h.left,a&&b)m[b]='translate3d('+s+'px, '+d+'px, 0)',m[c]=0,m[g]=0,m.willChange='transform';else{var w='bottom'==c?-1:1,y='right'==g?-1:1;m[c]=d*w,m[g]=s*y,m.willChange=c+', '+g}var E={"x-placement":e.placement};return e.attributes=le({},E,e.attributes),e.styles=le({},m,e.styles),e.arrowStyles=le({},e.offsets.arrow,e.arrowStyles),e},gpuAcceleration:!0,x:'bottom',y:'right'},applyStyle:{order:900,enabled:!0,fn:function(e){return V(e.instance.popper,e.styles),j(e.instance.popper,e.attributes),e.arrowElement&&Object.keys(e.arrowStyles).length&&V(e.arrowElement,e.arrowStyles),e},onLoad:function(e,t,o,n,i){var r=L(i,t,e,o.positionFixed),p=O(o.placement,r,t,e,o.modifiers.flip.boundariesElement,o.modifiers.flip.padding);return t.setAttribute('x-placement',p),V(t,{position:o.positionFixed?'fixed':'absolute'}),o},gpuAcceleration:void 0}}},ge});
+/**
+ * @popperjs/core v2.0.6 - MIT License
+ */
+
+"use strict";!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e=e||self).Popper={})}(this,(function(e){function t(e){return{width:(e=e.getBoundingClientRect()).width,height:e.height,top:e.top,right:e.right,bottom:e.bottom,left:e.left,x:e.left,y:e.top}}function r(e){return"[object Window]"!==e.toString()?(e=e.ownerDocument)?e.defaultView:window:e}function n(e){return{scrollLeft:(e=r(e)).pageXOffset,scrollTop:e.pageYOffset}}function o(e){return e instanceof r(e).Element}function i(e){return e instanceof r(e).HTMLElement}function a(e){return e?(e.nodeName||"").toLowerCase():null}function s(e){return(o(e)?e.ownerDocument:e.document).documentElement}function f(e){return t(s(e)).left+n(e).scrollLeft}function p(e,o,p){void 0===p&&(p=!1),e=t(e);var c={scrollLeft:0,scrollTop:0},u={x:0,y:0};return p||("body"!==a(o)&&(c=o!==r(o)&&i(o)?{scrollLeft:o.scrollLeft,scrollTop:o.scrollTop}:n(o)),i(o)?((u=t(o)).x+=o.clientLeft,u.y+=o.clientTop):(o=s(o))&&(u.x=f(o))),{x:e.left+c.scrollLeft-u.x,y:e.top+c.scrollTop-u.y,width:e.width,height:e.height}}function c(e){return{x:e.offsetLeft,y:e.offsetTop,width:e.offsetWidth,height:e.offsetHeight}}function u(e){return"html"===a(e)?e:e.parentNode||e.host||document.ownerDocument||document.documentElement}function d(e){return r(e).getComputedStyle(e)}function l(e,t){void 0===t&&(t=[]);var n=function e(t){if(0<=["html","body","#document"].indexOf(a(t)))return t.ownerDocument.body;if(i(t)){var r=d(t);if(/auto|scroll|overlay|hidden/.test(r.overflow+r.overflowY+r.overflowX))return t}return e(u(t))}(e);return n=(e="body"===a(n))?r(n):n,t=t.concat(n),e?t:t.concat(l(u(n)))}function m(e){var t;return!i(e)||!(t=e.offsetParent)||void 0!==window.InstallTrigger&&"fixed"===d(t).position?null:t}function h(e){var t=r(e);for(e=m(e);e&&0<=["table","td","th"].indexOf(a(e));)e=m(e);return e&&"body"===a(e)&&"static"===d(e).position?t:e||t}function v(e){var t=new Map,r=new Set,n=[];return e.forEach((function(e){t.set(e.name,e)})),e.forEach((function(e){r.has(e.name)||function e(o){r.add(o.name),[].concat(o.requires||[],o.requiresIfExists||[]).forEach((function(n){r.has(n)||(n=t.get(n))&&e(n)})),n.push(o)}(e)})),n}function g(e){var t;return function(){return t||(t=new Promise((function(r){Promise.resolve().then((function(){t=void 0,r(e())}))}))),t}}function b(e){return e.split("-")[0]}function y(){for(var e=arguments.length,t=Array(e),r=0;r<e;r++)t[r]=arguments[r];return!t.some((function(e){return!(e&&"function"==typeof e.getBoundingClientRect)}))}function x(e){void 0===e&&(e={});var t=e.defaultModifiers,r=void 0===t?[]:t,n=void 0===(e=e.defaultOptions)?F:e;return function(e,t,i){function a(){f.forEach((function(e){return e()})),f=[]}void 0===i&&(i=n);var s={placement:"bottom",orderedModifiers:[],options:Object.assign({},F,{},n),modifiersData:{},elements:{reference:e,popper:t},attributes:{},styles:{}},f=[],u=!1,d={state:s,setOptions:function(i){return a(),s.options=Object.assign({},n,{},s.options,{},i),s.scrollParents={reference:o(e)?l(e):[],popper:l(t)},i=function(e){var t=v(e);return C.reduce((function(e,r){return e.concat(t.filter((function(e){return e.phase===r})))}),[])}(function(e){var t=e.reduce((function(e,t){var r=e[t.name];return e[t.name]=r?Object.assign({},r,{},t,{options:Object.assign({},r.options,{},t.options),data:Object.assign({},r.data,{},t.data)}):t,e}),{});return Object.keys(t).map((function(e){return t[e]}))}([].concat(r,s.options.modifiers))),s.orderedModifiers=i.filter((function(e){return e.enabled})),s.orderedModifiers.forEach((function(e){var t=e.name,r=e.options;r=void 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//# sourceMappingURL=popper.min.js.map
diff --git a/core/assets/vendor/popperjs/popper.min.js.map b/core/assets/vendor/popperjs/popper.min.js.map
index 7107f613cf77..a0d27b78ab5f 100644
--- a/core/assets/vendor/popperjs/popper.min.js.map
+++ b/core/assets/vendor/popperjs/popper.min.js.map
@@ -1 +1 @@
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css[property] : css;\n}\n","/**\n * Returns the parentNode or the host of the element\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Element} parent\n */\nexport default function getParentNode(element) {\n if (element.nodeName === 'HTML') {\n return element;\n }\n return element.parentNode || element.host;\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport getParentNode from './getParentNode';\n\n/**\n * Returns the scrolling parent of the given element\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Element} scroll parent\n */\nexport default function getScrollParent(element) {\n // Return body, `getScroll` will take care to get the correct `scrollTop` from it\n if (!element) {\n return document.body\n }\n\n switch (element.nodeName) {\n case 'HTML':\n case 'BODY':\n return element.ownerDocument.body\n case '#document':\n return element.body\n }\n\n // Firefox want us to check `-x` and `-y` variations as well\n const { overflow, overflowX, overflowY } = getStyleComputedProperty(element);\n if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) {\n return element;\n }\n\n return getScrollParent(getParentNode(element));\n}\n","/**\n * Returns the reference node of the reference object, or the reference object itself.\n * @method\n * @memberof Popper.Utils\n * @param {Element|Object} reference - the reference element (the popper will be relative to this)\n * @returns {Element} parent\n */\nexport default function getReferenceNode(reference) {\n return reference && reference.referenceNode ? reference.referenceNode : reference;\n}\n","import isBrowser from './isBrowser';\n\nconst isIE11 = isBrowser && !!(window.MSInputMethodContext && document.documentMode);\nconst isIE10 = isBrowser && /MSIE 10/.test(navigator.userAgent);\n\n/**\n * Determines if the browser is Internet Explorer\n * @method\n * @memberof Popper.Utils\n * @param {Number} version to check\n * @returns {Boolean} isIE\n */\nexport default function isIE(version) {\n if (version === 11) {\n return isIE11;\n }\n if (version === 10) {\n return isIE10;\n }\n return isIE11 || isIE10;\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport isIE from './isIE';\n/**\n * Returns the offset parent of the given element\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Element} offset parent\n */\nexport default function getOffsetParent(element) {\n if (!element) {\n return document.documentElement;\n }\n\n const noOffsetParent = isIE(10) ? document.body : null;\n\n // NOTE: 1 DOM access here\n let offsetParent = element.offsetParent || null;\n // Skip hidden elements which don't have an offsetParent\n while (offsetParent === noOffsetParent && element.nextElementSibling) {\n offsetParent = (element = element.nextElementSibling).offsetParent;\n }\n\n const nodeName = offsetParent && offsetParent.nodeName;\n\n if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {\n return element ? element.ownerDocument.documentElement : document.documentElement;\n }\n\n // .offsetParent will return the closest TH, TD or TABLE in case\n // no offsetParent is present, I hate this job...\n if (\n ['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 &&\n getStyleComputedProperty(offsetParent, 'position') === 'static'\n ) {\n return getOffsetParent(offsetParent);\n }\n\n return offsetParent;\n}\n","import getOffsetParent from './getOffsetParent';\n\nexport default function isOffsetContainer(element) {\n const { nodeName } = element;\n if (nodeName === 'BODY') {\n return false;\n }\n return (\n nodeName === 'HTML' || getOffsetParent(element.firstElementChild) === element\n );\n}\n","/**\n * Finds the root node (document, shadowDOM root) of the given element\n * @method\n * @memberof Popper.Utils\n * @argument {Element} node\n * @returns {Element} root node\n */\nexport default function getRoot(node) {\n if (node.parentNode !== null) {\n return getRoot(node.parentNode);\n }\n\n return node;\n}\n","import isOffsetContainer from './isOffsetContainer';\nimport getRoot from './getRoot';\nimport getOffsetParent from './getOffsetParent';\n\n/**\n * Finds the offset parent common to the two provided nodes\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element1\n * @argument {Element} element2\n * @returns {Element} common offset parent\n */\nexport default function findCommonOffsetParent(element1, element2) {\n // This check is needed to avoid errors in case one of the elements isn't defined for any reason\n if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {\n return document.documentElement;\n }\n\n // Here we make sure to give as \"start\" the element that comes first in the DOM\n const order =\n element1.compareDocumentPosition(element2) &\n Node.DOCUMENT_POSITION_FOLLOWING;\n const start = order ? element1 : element2;\n const end = order ? element2 : element1;\n\n // Get common ancestor container\n const range = document.createRange();\n range.setStart(start, 0);\n range.setEnd(end, 0);\n const { commonAncestorContainer } = range;\n\n // Both nodes are inside #document\n if (\n (element1 !== commonAncestorContainer &&\n element2 !== commonAncestorContainer) ||\n start.contains(end)\n ) {\n if (isOffsetContainer(commonAncestorContainer)) {\n return commonAncestorContainer;\n }\n\n return getOffsetParent(commonAncestorContainer);\n }\n\n // one of the nodes is inside shadowDOM, find which one\n const element1root = getRoot(element1);\n if (element1root.host) {\n return findCommonOffsetParent(element1root.host, element2);\n } else {\n return findCommonOffsetParent(element1, getRoot(element2).host);\n }\n}\n","/**\n * Gets the scroll value of the given element in the given side (top and left)\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @argument {String} side `top` or `left`\n * @returns {number} amount of scrolled pixels\n */\nexport default function getScroll(element, side = 'top') {\n const upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';\n const nodeName = element.nodeName;\n\n if (nodeName === 'BODY' || nodeName === 'HTML') {\n const html = element.ownerDocument.documentElement;\n const scrollingElement = element.ownerDocument.scrollingElement || html;\n return scrollingElement[upperSide];\n }\n\n return element[upperSide];\n}\n","import getScroll from './getScroll';\n\n/*\n * Sum or subtract the element scroll values (left and top) from a given rect object\n * @method\n * @memberof Popper.Utils\n * @param {Object} rect - Rect object you want to change\n * @param {HTMLElement} element - The element from the function reads the scroll values\n * @param {Boolean} subtract - set to true if you want to subtract the scroll values\n * @return {Object} rect - The modifier rect object\n */\nexport default function includeScroll(rect, element, subtract = false) {\n const scrollTop = getScroll(element, 'top');\n const scrollLeft = getScroll(element, 'left');\n const modifier = subtract ? -1 : 1;\n rect.top += scrollTop * modifier;\n rect.bottom += scrollTop * modifier;\n rect.left += scrollLeft * modifier;\n rect.right += scrollLeft * modifier;\n return rect;\n}\n","/*\n * Helper to detect borders of a given element\n * @method\n * @memberof Popper.Utils\n * @param {CSSStyleDeclaration} styles\n * Result of `getStyleComputedProperty` on the given element\n * @param {String} axis - `x` or `y`\n * @return {number} borders - The borders size of the given axis\n */\n\nexport default function getBordersSize(styles, axis) {\n const sideA = axis === 'x' ? 'Left' : 'Top';\n const sideB = sideA === 'Left' ? 'Right' : 'Bottom';\n\n return (\n parseFloat(styles[`border${sideA}Width`], 10) +\n parseFloat(styles[`border${sideB}Width`], 10)\n );\n}\n","import isIE from './isIE';\n\nfunction getSize(axis, body, html, computedStyle) {\n return Math.max(\n body[`offset${axis}`],\n body[`scroll${axis}`],\n html[`client${axis}`],\n html[`offset${axis}`],\n html[`scroll${axis}`],\n isIE(10)\n ? (parseInt(html[`offset${axis}`]) + \n parseInt(computedStyle[`margin${axis === 'Height' ? 'Top' : 'Left'}`]) + \n parseInt(computedStyle[`margin${axis === 'Height' ? 'Bottom' : 'Right'}`]))\n : 0 \n );\n}\n\nexport default function getWindowSizes(document) {\n const body = document.body;\n const html = document.documentElement;\n const computedStyle = isIE(10) && getComputedStyle(html);\n\n return {\n height: getSize('Height', body, html, computedStyle),\n width: getSize('Width', body, html, computedStyle),\n };\n}\n","/**\n * Given element offsets, generate an output similar to getBoundingClientRect\n * @method\n * @memberof Popper.Utils\n * @argument {Object} offsets\n * @returns {Object} ClientRect like output\n */\nexport default function getClientRect(offsets) {\n return {\n ...offsets,\n right: offsets.left + offsets.width,\n bottom: offsets.top + offsets.height,\n };\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport getBordersSize from './getBordersSize';\nimport getWindowSizes from './getWindowSizes';\nimport getScroll from './getScroll';\nimport getClientRect from './getClientRect';\nimport isIE from './isIE';\n\n/**\n * Get bounding client rect of given element\n * @method\n * @memberof Popper.Utils\n * @param {HTMLElement} element\n * @return {Object} client rect\n */\nexport default function getBoundingClientRect(element) {\n let rect = {};\n\n // IE10 10 FIX: Please, don't ask, the element isn't\n // considered in DOM in some circumstances...\n // This isn't reproducible in IE10 compatibility mode of IE11\n try {\n if (isIE(10)) {\n rect = element.getBoundingClientRect();\n const scrollTop = getScroll(element, 'top');\n const scrollLeft = getScroll(element, 'left');\n rect.top += scrollTop;\n rect.left += scrollLeft;\n rect.bottom += scrollTop;\n rect.right += scrollLeft;\n }\n else {\n rect = element.getBoundingClientRect();\n }\n }\n catch(e){}\n\n const result = {\n left: rect.left,\n top: rect.top,\n width: rect.right - rect.left,\n height: rect.bottom - rect.top,\n };\n\n // subtract scrollbar size from sizes\n const sizes = element.nodeName === 'HTML' ? getWindowSizes(element.ownerDocument) : {};\n const width =\n sizes.width || element.clientWidth || result.width;\n const height =\n sizes.height || element.clientHeight || result.height;\n\n let horizScrollbar = element.offsetWidth - width;\n let vertScrollbar = element.offsetHeight - height;\n\n // if an hypothetical scrollbar is detected, we must be sure it's not a `border`\n // we make this check conditional for performance reasons\n if (horizScrollbar || vertScrollbar) {\n const styles = getStyleComputedProperty(element);\n horizScrollbar -= getBordersSize(styles, 'x');\n vertScrollbar -= getBordersSize(styles, 'y');\n\n result.width -= horizScrollbar;\n result.height -= vertScrollbar;\n }\n\n return getClientRect(result);\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport includeScroll from './includeScroll';\nimport getScrollParent from './getScrollParent';\nimport getBoundingClientRect from './getBoundingClientRect';\nimport runIsIE from './isIE';\nimport getClientRect from './getClientRect';\n\nexport default function getOffsetRectRelativeToArbitraryNode(children, parent, fixedPosition = false) {\n const isIE10 = runIsIE(10);\n const isHTML = parent.nodeName === 'HTML';\n const childrenRect = getBoundingClientRect(children);\n const parentRect = getBoundingClientRect(parent);\n const scrollParent = getScrollParent(children);\n\n const styles = getStyleComputedProperty(parent);\n const borderTopWidth = parseFloat(styles.borderTopWidth, 10);\n const borderLeftWidth = parseFloat(styles.borderLeftWidth, 10);\n\n // In cases where the parent is fixed, we must ignore negative scroll in offset calc\n if(fixedPosition && isHTML) {\n parentRect.top = Math.max(parentRect.top, 0);\n parentRect.left = Math.max(parentRect.left, 0);\n }\n let offsets = getClientRect({\n top: childrenRect.top - parentRect.top - borderTopWidth,\n left: childrenRect.left - parentRect.left - borderLeftWidth,\n width: childrenRect.width,\n height: childrenRect.height,\n });\n offsets.marginTop = 0;\n offsets.marginLeft = 0;\n\n // Subtract margins of documentElement in case it's being used as parent\n // we do this only on HTML because it's the only element that behaves\n // differently when margins are applied to it. The margins are included in\n // the box of the documentElement, in the other cases not.\n if (!isIE10 && isHTML) {\n const marginTop = parseFloat(styles.marginTop, 10);\n const marginLeft = parseFloat(styles.marginLeft, 10);\n\n offsets.top -= borderTopWidth - marginTop;\n offsets.bottom -= borderTopWidth - marginTop;\n offsets.left -= borderLeftWidth - marginLeft;\n offsets.right -= borderLeftWidth - marginLeft;\n\n // Attach marginTop and marginLeft because in some circumstances we may need them\n offsets.marginTop = marginTop;\n offsets.marginLeft = marginLeft;\n }\n\n if (\n isIE10 && !fixedPosition\n ? parent.contains(scrollParent)\n : parent === scrollParent && scrollParent.nodeName !== 'BODY'\n ) {\n offsets = includeScroll(offsets, parent);\n }\n\n return offsets;\n}\n","import getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';\nimport getScroll from './getScroll';\nimport getClientRect from './getClientRect';\n\nexport default function getViewportOffsetRectRelativeToArtbitraryNode(element, excludeScroll = false) {\n const html = element.ownerDocument.documentElement;\n const relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);\n const width = Math.max(html.clientWidth, window.innerWidth || 0);\n const height = Math.max(html.clientHeight, window.innerHeight || 0);\n\n const scrollTop = !excludeScroll ? getScroll(html) : 0;\n const scrollLeft = !excludeScroll ? getScroll(html, 'left') : 0;\n\n const offset = {\n top: scrollTop - relativeOffset.top + relativeOffset.marginTop,\n left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,\n width,\n height,\n };\n\n return getClientRect(offset);\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport getParentNode from './getParentNode';\n\n/**\n * Check if the given element is fixed or is inside a fixed parent\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @argument {Element} customContainer\n * @returns {Boolean} answer to \"isFixed?\"\n */\nexport default function isFixed(element) {\n const nodeName = element.nodeName;\n if (nodeName === 'BODY' || nodeName === 'HTML') {\n return false;\n }\n if (getStyleComputedProperty(element, 'position') === 'fixed') {\n return true;\n }\n const parentNode = getParentNode(element);\n if (!parentNode) {\n return false;\n }\n return isFixed(parentNode);\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport isIE from './isIE';\n/**\n * Finds the first parent of an element that has a transformed property defined\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Element} first transformed parent or documentElement\n */\n\nexport default function getFixedPositionOffsetParent(element) {\n // This check is needed to avoid errors in case one of the elements isn't defined for any reason\n if (!element || !element.parentElement || isIE()) {\n return document.documentElement;\n }\n let el = element.parentElement;\n while (el && getStyleComputedProperty(el, 'transform') === 'none') {\n el = el.parentElement;\n }\n return el || document.documentElement;\n\n}\n","import getScrollParent from './getScrollParent';\nimport getParentNode from './getParentNode';\nimport getReferenceNode from './getReferenceNode';\nimport findCommonOffsetParent from './findCommonOffsetParent';\nimport getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';\nimport getViewportOffsetRectRelativeToArtbitraryNode from './getViewportOffsetRectRelativeToArtbitraryNode';\nimport getWindowSizes from './getWindowSizes';\nimport isFixed from './isFixed';\nimport getFixedPositionOffsetParent from './getFixedPositionOffsetParent';\n\n/**\n * Computed the boundaries limits and return them\n * @method\n * @memberof Popper.Utils\n * @param {HTMLElement} popper\n * @param {HTMLElement} reference\n * @param {number} padding\n * @param {HTMLElement} boundariesElement - Element used to define the boundaries\n * @param {Boolean} fixedPosition - Is in fixed position mode\n * @returns {Object} Coordinates of the boundaries\n */\nexport default function getBoundaries(\n popper,\n reference,\n padding,\n boundariesElement,\n fixedPosition = false\n) {\n // NOTE: 1 DOM access here\n\n let boundaries = { top: 0, left: 0 };\n const offsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));\n\n // Handle viewport case\n if (boundariesElement === 'viewport' ) {\n boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent, fixedPosition);\n }\n\n else {\n // Handle other cases based on DOM element used as boundaries\n let boundariesNode;\n if (boundariesElement === 'scrollParent') {\n boundariesNode = getScrollParent(getParentNode(reference));\n if (boundariesNode.nodeName === 'BODY') {\n boundariesNode = popper.ownerDocument.documentElement;\n }\n } else if (boundariesElement === 'window') {\n boundariesNode = popper.ownerDocument.documentElement;\n } else {\n boundariesNode = boundariesElement;\n }\n\n const offsets = getOffsetRectRelativeToArbitraryNode(\n boundariesNode,\n offsetParent,\n fixedPosition\n );\n\n // In case of HTML, we need a different computation\n if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {\n const { height, width } = getWindowSizes(popper.ownerDocument);\n boundaries.top += offsets.top - offsets.marginTop;\n boundaries.bottom = height + offsets.top;\n boundaries.left += offsets.left - offsets.marginLeft;\n boundaries.right = width + offsets.left;\n } else {\n // for all the other DOM elements, this one is good\n boundaries = offsets;\n }\n }\n\n // Add paddings\n padding = padding || 0;\n const isPaddingNumber = typeof padding === 'number';\n boundaries.left += isPaddingNumber ? padding : padding.left || 0; \n boundaries.top += isPaddingNumber ? padding : padding.top || 0; \n boundaries.right -= isPaddingNumber ? padding : padding.right || 0; \n boundaries.bottom -= isPaddingNumber ? padding : padding.bottom || 0; \n\n return boundaries;\n}\n","import getBoundaries from '../utils/getBoundaries';\n\nfunction getArea({ width, height }) {\n return width * height;\n}\n\n/**\n * Utility used to transform the `auto` placement to the placement with more\n * available space.\n * @method\n * @memberof Popper.Utils\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function computeAutoPlacement(\n placement,\n refRect,\n popper,\n reference,\n boundariesElement,\n padding = 0\n) {\n if (placement.indexOf('auto') === -1) {\n return placement;\n }\n\n const boundaries = getBoundaries(\n popper,\n reference,\n padding,\n boundariesElement\n );\n\n const rects = {\n top: {\n width: boundaries.width,\n height: refRect.top - boundaries.top,\n },\n right: {\n width: boundaries.right - refRect.right,\n height: boundaries.height,\n },\n bottom: {\n width: boundaries.width,\n height: boundaries.bottom - refRect.bottom,\n },\n left: {\n width: refRect.left - boundaries.left,\n height: boundaries.height,\n },\n };\n\n const sortedAreas = Object.keys(rects)\n .map(key => ({\n key,\n ...rects[key],\n area: getArea(rects[key]),\n }))\n .sort((a, b) => b.area - a.area);\n\n const filteredAreas = sortedAreas.filter(\n ({ width, height }) =>\n width >= popper.clientWidth && height >= popper.clientHeight\n );\n\n const computedPlacement = filteredAreas.length > 0\n ? filteredAreas[0].key\n : sortedAreas[0].key;\n\n const variation = placement.split('-')[1];\n\n return computedPlacement + (variation ? `-${variation}` : '');\n}\n","import findCommonOffsetParent from './findCommonOffsetParent';\nimport getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';\nimport getFixedPositionOffsetParent from './getFixedPositionOffsetParent';\nimport getReferenceNode from './getReferenceNode';\n\n/**\n * Get offsets to the reference element\n * @method\n * @memberof Popper.Utils\n * @param {Object} state\n * @param {Element} popper - the popper element\n * @param {Element} reference - the reference element (the popper will be relative to this)\n * @param {Element} fixedPosition - is in fixed position mode\n * @returns {Object} An object containing the offsets which will be applied to the popper\n */\nexport default function getReferenceOffsets(state, popper, reference, fixedPosition = null) {\n const commonOffsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));\n return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent, fixedPosition);\n}\n","/**\n * Get the outer sizes of the given element (offset size + margins)\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Object} object containing width and height properties\n */\nexport default function getOuterSizes(element) {\n const window = element.ownerDocument.defaultView;\n const styles = window.getComputedStyle(element);\n const x = parseFloat(styles.marginTop || 0) + parseFloat(styles.marginBottom || 0);\n const y = parseFloat(styles.marginLeft || 0) + parseFloat(styles.marginRight || 0);\n const result = {\n width: element.offsetWidth + y,\n height: element.offsetHeight + x,\n };\n return result;\n}\n","/**\n * Get the opposite placement of the given one\n * @method\n * @memberof Popper.Utils\n * @argument {String} placement\n * @returns {String} flipped placement\n */\nexport default function getOppositePlacement(placement) {\n const hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };\n return placement.replace(/left|right|bottom|top/g, matched => hash[matched]);\n}\n","import getOuterSizes from './getOuterSizes';\nimport getOppositePlacement from './getOppositePlacement';\n\n/**\n * Get offsets to the popper\n * @method\n * @memberof Popper.Utils\n * @param {Object} position - CSS position the Popper will get applied\n * @param {HTMLElement} popper - the popper element\n * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)\n * @param {String} placement - one of the valid placement options\n * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper\n */\nexport default function getPopperOffsets(popper, referenceOffsets, placement) {\n placement = placement.split('-')[0];\n\n // Get popper node sizes\n const popperRect = getOuterSizes(popper);\n\n // Add position, width and height to our offsets object\n const popperOffsets = {\n width: popperRect.width,\n height: popperRect.height,\n };\n\n // depending by the popper placement we have to compute its offsets slightly differently\n const isHoriz = ['right', 'left'].indexOf(placement) !== -1;\n const mainSide = isHoriz ? 'top' : 'left';\n const secondarySide = isHoriz ? 'left' : 'top';\n const measurement = isHoriz ? 'height' : 'width';\n const secondaryMeasurement = !isHoriz ? 'height' : 'width';\n\n popperOffsets[mainSide] =\n referenceOffsets[mainSide] +\n referenceOffsets[measurement] / 2 -\n popperRect[measurement] / 2;\n if (placement === secondarySide) {\n popperOffsets[secondarySide] =\n referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];\n } else {\n popperOffsets[secondarySide] =\n referenceOffsets[getOppositePlacement(secondarySide)];\n }\n\n return popperOffsets;\n}\n","/**\n * Mimics the `find` method of Array\n * @method\n * @memberof Popper.Utils\n * @argument {Array} arr\n * @argument prop\n * @argument value\n * @returns index or -1\n */\nexport default function find(arr, check) {\n // use native find if supported\n if (Array.prototype.find) {\n return arr.find(check);\n }\n\n // use `filter` to obtain the same behavior of `find`\n return arr.filter(check)[0];\n}\n","import find from './find';\n\n/**\n * Return the index of the matching object\n * @method\n * @memberof Popper.Utils\n * @argument {Array} arr\n * @argument prop\n * @argument value\n * @returns index or -1\n */\nexport default function findIndex(arr, prop, value) {\n // use native findIndex if supported\n if (Array.prototype.findIndex) {\n return arr.findIndex(cur => cur[prop] === value);\n }\n\n // use `find` + `indexOf` if `findIndex` isn't supported\n const match = find(arr, obj => obj[prop] === value);\n return arr.indexOf(match);\n}\n","import isFunction from './isFunction';\nimport findIndex from './findIndex';\nimport getClientRect from '../utils/getClientRect';\n\n/**\n * Loop trough the list of modifiers and run them in order,\n * each of them will then edit the data object.\n * @method\n * @memberof Popper.Utils\n * @param {dataObject} data\n * @param {Array} modifiers\n * @param {String} ends - Optional modifier name used as stopper\n * @returns {dataObject}\n */\nexport default function runModifiers(modifiers, data, ends) {\n const modifiersToRun = ends === undefined\n ? modifiers\n : modifiers.slice(0, findIndex(modifiers, 'name', ends));\n\n modifiersToRun.forEach(modifier => {\n if (modifier['function']) { // eslint-disable-line dot-notation\n console.warn('`modifier.function` is deprecated, use `modifier.fn`!');\n }\n const fn = modifier['function'] || modifier.fn; // eslint-disable-line dot-notation\n if (modifier.enabled && isFunction(fn)) {\n // Add properties to offsets to make them a complete clientRect object\n // we do this before each modifier to make sure the previous one doesn't\n // mess with these values\n data.offsets.popper = getClientRect(data.offsets.popper);\n data.offsets.reference = getClientRect(data.offsets.reference);\n\n data = fn(data, modifier);\n }\n });\n\n return data;\n}\n","import computeAutoPlacement from '../utils/computeAutoPlacement';\nimport getReferenceOffsets from '../utils/getReferenceOffsets';\nimport getPopperOffsets from '../utils/getPopperOffsets';\nimport runModifiers from '../utils/runModifiers';\n\n/**\n * Updates the position of the popper, computing the new offsets and applying\n * the new style.<br />\n * Prefer `scheduleUpdate` over `update` because of performance reasons.\n * @method\n * @memberof Popper\n */\nexport default function update() {\n // if popper is destroyed, don't perform any further update\n if (this.state.isDestroyed) {\n return;\n }\n\n let data = {\n instance: this,\n styles: {},\n arrowStyles: {},\n attributes: {},\n flipped: false,\n offsets: {},\n };\n\n // compute reference element offsets\n data.offsets.reference = getReferenceOffsets(\n this.state,\n this.popper,\n this.reference,\n this.options.positionFixed\n );\n\n // compute auto placement, store placement inside the data object,\n // modifiers will be able to edit `placement` if needed\n // and refer to originalPlacement to know the original value\n data.placement = computeAutoPlacement(\n this.options.placement,\n data.offsets.reference,\n this.popper,\n this.reference,\n this.options.modifiers.flip.boundariesElement,\n this.options.modifiers.flip.padding\n );\n\n // store the computed placement inside `originalPlacement`\n data.originalPlacement = data.placement;\n\n data.positionFixed = this.options.positionFixed;\n\n // compute the popper offsets\n data.offsets.popper = getPopperOffsets(\n this.popper,\n data.offsets.reference,\n data.placement\n );\n\n data.offsets.popper.position = this.options.positionFixed\n ? 'fixed'\n : 'absolute';\n\n // run the modifiers\n data = runModifiers(this.modifiers, data);\n\n // the first `update` will call `onCreate` callback\n // the other ones will call `onUpdate` callback\n if (!this.state.isCreated) {\n this.state.isCreated = true;\n this.options.onCreate(data);\n } else {\n this.options.onUpdate(data);\n }\n}\n","/**\n * Helper used to know if the given modifier is enabled.\n * @method\n * @memberof Popper.Utils\n * @returns {Boolean}\n */\nexport default function isModifierEnabled(modifiers, modifierName) {\n return modifiers.some(\n ({ name, enabled }) => enabled && name === modifierName\n );\n}\n","/**\n * Get the prefixed supported property name\n * @method\n * @memberof Popper.Utils\n * @argument {String} property (camelCase)\n * @returns {String} prefixed property (camelCase or PascalCase, depending on the vendor prefix)\n */\nexport default function getSupportedPropertyName(property) {\n const prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];\n const upperProp = property.charAt(0).toUpperCase() + property.slice(1);\n\n for (let i = 0; i < prefixes.length; i++) {\n const prefix = prefixes[i];\n const toCheck = prefix ? `${prefix}${upperProp}` : property;\n if (typeof document.body.style[toCheck] !== 'undefined') {\n return toCheck;\n }\n }\n return null;\n}\n","import isModifierEnabled from '../utils/isModifierEnabled';\nimport getSupportedPropertyName from '../utils/getSupportedPropertyName';\n\n/**\n * Destroys the popper.\n * @method\n * @memberof Popper\n */\nexport default function destroy() {\n this.state.isDestroyed = true;\n\n // touch DOM only if `applyStyle` modifier is enabled\n if (isModifierEnabled(this.modifiers, 'applyStyle')) {\n this.popper.removeAttribute('x-placement');\n this.popper.style.position = '';\n this.popper.style.top = '';\n this.popper.style.left = '';\n this.popper.style.right = '';\n this.popper.style.bottom = '';\n this.popper.style.willChange = '';\n this.popper.style[getSupportedPropertyName('transform')] = '';\n }\n\n this.disableEventListeners();\n\n // remove the popper if user explicitly asked for the deletion on destroy\n // do not use `remove` because IE11 doesn't support it\n if (this.options.removeOnDestroy) {\n this.popper.parentNode.removeChild(this.popper);\n }\n return this;\n}\n","/**\n * Get the window associated with the element\n * @argument {Element} element\n * @returns {Window}\n */\nexport default function getWindow(element) {\n const ownerDocument = element.ownerDocument;\n return ownerDocument ? ownerDocument.defaultView : window;\n}\n","import getScrollParent from './getScrollParent';\nimport getWindow from './getWindow';\n\nfunction attachToScrollParents(scrollParent, event, callback, scrollParents) {\n const isBody = scrollParent.nodeName === 'BODY';\n const target = isBody ? scrollParent.ownerDocument.defaultView : scrollParent;\n target.addEventListener(event, callback, { passive: true });\n\n if (!isBody) {\n attachToScrollParents(\n getScrollParent(target.parentNode),\n event,\n callback,\n scrollParents\n );\n }\n scrollParents.push(target);\n}\n\n/**\n * Setup needed event listeners used to update the popper position\n * @method\n * @memberof Popper.Utils\n * @private\n */\nexport default function setupEventListeners(\n reference,\n options,\n state,\n updateBound\n) {\n // Resize event listener on window\n state.updateBound = updateBound;\n getWindow(reference).addEventListener('resize', state.updateBound, { passive: true });\n\n // Scroll event listener on scroll parents\n const scrollElement = getScrollParent(reference);\n attachToScrollParents(\n scrollElement,\n 'scroll',\n state.updateBound,\n state.scrollParents\n );\n state.scrollElement = scrollElement;\n state.eventsEnabled = true;\n\n return state;\n}\n","import setupEventListeners from '../utils/setupEventListeners';\n\n/**\n * It will add resize/scroll events and start recalculating\n * position of the popper element when they are triggered.\n * @method\n * @memberof Popper\n */\nexport default function enableEventListeners() {\n if (!this.state.eventsEnabled) {\n this.state = setupEventListeners(\n this.reference,\n this.options,\n this.state,\n this.scheduleUpdate\n );\n }\n}\n","import getWindow from './getWindow';\n\n/**\n * Remove event listeners used to update the popper position\n * @method\n * @memberof Popper.Utils\n * @private\n */\nexport default function removeEventListeners(reference, state) {\n // Remove resize event listener on window\n getWindow(reference).removeEventListener('resize', state.updateBound);\n\n // Remove scroll event listener on scroll parents\n state.scrollParents.forEach(target => {\n target.removeEventListener('scroll', state.updateBound);\n });\n\n // Reset state\n state.updateBound = null;\n state.scrollParents = [];\n state.scrollElement = null;\n state.eventsEnabled = false;\n return state;\n}\n","import removeEventListeners from '../utils/removeEventListeners';\n\n/**\n * It will remove resize/scroll events and won't recalculate popper position\n * when they are triggered. It also won't trigger `onUpdate` callback anymore,\n * unless you call `update` method manually.\n * @method\n * @memberof Popper\n */\nexport default function disableEventListeners() {\n if (this.state.eventsEnabled) {\n cancelAnimationFrame(this.scheduleUpdate);\n this.state = removeEventListeners(this.reference, this.state);\n }\n}\n","/**\n * Tells if a given input is a number\n * @method\n * @memberof Popper.Utils\n * @param {*} input to check\n * @return {Boolean}\n */\nexport default function isNumeric(n) {\n return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);\n}\n","import isNumeric from './isNumeric';\n\n/**\n * Set the style to the given popper\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element - Element to apply the style to\n * @argument {Object} styles\n * Object with a list of properties and values which will be applied to the element\n */\nexport default function setStyles(element, styles) {\n Object.keys(styles).forEach(prop => {\n let unit = '';\n // add unit if the value is numeric and is one of the following\n if (\n ['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !==\n -1 &&\n isNumeric(styles[prop])\n ) {\n unit = 'px';\n }\n element.style[prop] = styles[prop] + unit;\n });\n}\n","/**\n * Set the attributes to the given popper\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element - Element to apply the attributes to\n * @argument {Object} styles\n * Object with a list of properties and values which will be applied to the element\n */\nexport default function setAttributes(element, attributes) {\n Object.keys(attributes).forEach(function(prop) {\n const value = attributes[prop];\n if (value !== false) {\n element.setAttribute(prop, attributes[prop]);\n } else {\n element.removeAttribute(prop);\n }\n });\n}\n","/**\n * @function\n * @memberof Popper.Utils\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Boolean} shouldRound - If the offsets should be rounded at all\n * @returns {Object} The popper's position offsets rounded\n *\n * The tale of pixel-perfect positioning. It's still not 100% perfect, but as\n * good as it can be within reason.\n * Discussion here: https://github.com/FezVrasta/popper.js/pull/715\n *\n * Low DPI screens cause a popper to be blurry if not using full pixels (Safari\n * as well on High DPI screens).\n *\n * Firefox prefers no rounding for positioning and does not have blurriness on\n * high DPI screens.\n *\n * Only horizontal placement and left/right values need to be considered.\n */\nexport default function getRoundedOffsets(data, shouldRound) {\n const { popper, reference } = data.offsets;\n const { round, floor } = Math;\n const noRound = v => v;\n \n const referenceWidth = round(reference.width);\n const popperWidth = round(popper.width);\n \n const isVertical = ['left', 'right'].indexOf(data.placement) !== -1;\n const isVariation = data.placement.indexOf('-') !== -1;\n const sameWidthParity = referenceWidth % 2 === popperWidth % 2;\n const bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;\n\n const horizontalToInteger = !shouldRound\n ? noRound\n : isVertical || isVariation || sameWidthParity\n ? round\n : floor;\n const verticalToInteger = !shouldRound ? noRound : round;\n\n return {\n left: horizontalToInteger(\n bothOddWidth && !isVariation && shouldRound\n ? popper.left - 1\n : popper.left\n ),\n top: verticalToInteger(popper.top),\n bottom: verticalToInteger(popper.bottom),\n right: horizontalToInteger(popper.right),\n };\n}\n","import find from './find';\n\n/**\n * Helper used to know if the given modifier depends from another one.<br />\n * It checks if the needed modifier is listed and enabled.\n * @method\n * @memberof Popper.Utils\n * @param {Array} modifiers - list of modifiers\n * @param {String} requestingName - name of requesting modifier\n * @param {String} requestedName - name of requested modifier\n * @returns {Boolean}\n */\nexport default function isModifierRequired(\n modifiers,\n requestingName,\n requestedName\n) {\n const requesting = find(modifiers, ({ name }) => name === requestingName);\n\n const isRequired =\n !!requesting &&\n modifiers.some(modifier => {\n return (\n modifier.name === requestedName &&\n modifier.enabled &&\n modifier.order < requesting.order\n );\n });\n\n if (!isRequired) {\n const requesting = `\\`${requestingName}\\``;\n const requested = `\\`${requestedName}\\``;\n console.warn(\n `${requested} modifier is required by ${requesting} modifier in order to work, be sure to include it before ${requesting}!`\n );\n }\n return isRequired;\n}\n","/**\n * Get the opposite placement variation of the given one\n * @method\n * @memberof Popper.Utils\n * @argument {String} placement variation\n * @returns {String} flipped placement variation\n */\nexport default function getOppositeVariation(variation) {\n if (variation === 'end') {\n return 'start';\n } else if (variation === 'start') {\n return 'end';\n }\n return variation;\n}\n","import placements from '../methods/placements';\n\n// Get rid of `auto` `auto-start` and `auto-end`\nconst validPlacements = placements.slice(3);\n\n/**\n * Given an initial placement, returns all the subsequent placements\n * clockwise (or counter-clockwise).\n *\n * @method\n * @memberof Popper.Utils\n * @argument {String} placement - A valid placement (it accepts variations)\n * @argument {Boolean} counter - Set to true to walk the placements counterclockwise\n * @returns {Array} placements including their variations\n */\nexport default function clockwise(placement, counter = false) {\n const index = validPlacements.indexOf(placement);\n const arr = validPlacements\n .slice(index + 1)\n .concat(validPlacements.slice(0, index));\n return counter ? arr.reverse() : arr;\n}\n","import isNumeric from '../utils/isNumeric';\nimport getClientRect from '../utils/getClientRect';\nimport find from '../utils/find';\n\n/**\n * Converts a string containing value + unit into a px value number\n * @function\n * @memberof {modifiers~offset}\n * @private\n * @argument {String} str - Value + unit string\n * @argument {String} measurement - `height` or `width`\n * @argument {Object} popperOffsets\n * @argument {Object} referenceOffsets\n * @returns {Number|String}\n * Value in pixels, or original string if no values were extracted\n */\nexport function toValue(str, measurement, popperOffsets, referenceOffsets) {\n // separate value from unit\n const split = str.match(/((?:\\-|\\+)?\\d*\\.?\\d*)(.*)/);\n const value = +split[1];\n const unit = split[2];\n\n // If it's not a number it's an operator, I guess\n if (!value) {\n return str;\n }\n\n if (unit.indexOf('%') === 0) {\n let element;\n switch (unit) {\n case '%p':\n element = popperOffsets;\n break;\n case '%':\n case '%r':\n default:\n element = referenceOffsets;\n }\n\n const rect = getClientRect(element);\n return rect[measurement] / 100 * value;\n } else if (unit === 'vh' || unit === 'vw') {\n // if is a vh or vw, we calculate the size based on the viewport\n let size;\n if (unit === 'vh') {\n size = Math.max(\n document.documentElement.clientHeight,\n window.innerHeight || 0\n );\n } else {\n size = Math.max(\n document.documentElement.clientWidth,\n window.innerWidth || 0\n );\n }\n return size / 100 * value;\n } else {\n // if is an explicit pixel unit, we get rid of the unit and keep the value\n // if is an implicit unit, it's px, and we return just the value\n return value;\n }\n}\n\n/**\n * Parse an `offset` string to extrapolate `x` and `y` numeric offsets.\n * @function\n * @memberof {modifiers~offset}\n * @private\n * @argument {String} offset\n * @argument {Object} popperOffsets\n * @argument {Object} referenceOffsets\n * @argument {String} basePlacement\n * @returns {Array} a two cells array with x and y offsets in numbers\n */\nexport function parseOffset(\n offset,\n popperOffsets,\n referenceOffsets,\n basePlacement\n) {\n const offsets = [0, 0];\n\n // Use height if placement is left or right and index is 0 otherwise use width\n // in this way the first offset will use an axis and the second one\n // will use the other one\n const useHeight = ['right', 'left'].indexOf(basePlacement) !== -1;\n\n // Split the offset string to obtain a list of values and operands\n // The regex addresses values with the plus or minus sign in front (+10, -20, etc)\n const fragments = offset.split(/(\\+|\\-)/).map(frag => frag.trim());\n\n // Detect if the offset string contains a pair of values or a single one\n // they could be separated by comma or space\n const divider = fragments.indexOf(\n find(fragments, frag => frag.search(/,|\\s/) !== -1)\n );\n\n if (fragments[divider] && fragments[divider].indexOf(',') === -1) {\n console.warn(\n 'Offsets separated by white space(s) are deprecated, use a comma (,) instead.'\n );\n }\n\n // If divider is found, we divide the list of values and operands to divide\n // them by ofset X and Y.\n const splitRegex = /\\s*,\\s*|\\s+/;\n let ops = divider !== -1\n ? [\n fragments\n .slice(0, divider)\n .concat([fragments[divider].split(splitRegex)[0]]),\n [fragments[divider].split(splitRegex)[1]].concat(\n fragments.slice(divider + 1)\n ),\n ]\n : [fragments];\n\n // Convert the values with units to absolute pixels to allow our computations\n ops = ops.map((op, index) => {\n // Most of the units rely on the orientation of the popper\n const measurement = (index === 1 ? !useHeight : useHeight)\n ? 'height'\n : 'width';\n let mergeWithPrevious = false;\n return (\n op\n // This aggregates any `+` or `-` sign that aren't considered operators\n // e.g.: 10 + +5 => [10, +, +5]\n .reduce((a, b) => {\n if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) {\n a[a.length - 1] = b;\n mergeWithPrevious = true;\n return a;\n } else if (mergeWithPrevious) {\n a[a.length - 1] += b;\n mergeWithPrevious = false;\n return a;\n } else {\n return a.concat(b);\n }\n }, [])\n // Here we convert the string values into number values (in px)\n .map(str => toValue(str, measurement, popperOffsets, referenceOffsets))\n );\n });\n\n // Loop trough the offsets arrays and execute the operations\n ops.forEach((op, index) => {\n op.forEach((frag, index2) => {\n if (isNumeric(frag)) {\n offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1);\n }\n });\n });\n return offsets;\n}\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @argument {Number|String} options.offset=0\n * The offset value as described in the modifier description\n * @returns {Object} The data object, properly modified\n */\nexport default function offset(data, { offset }) {\n const { placement, offsets: { popper, reference } } = data;\n const basePlacement = placement.split('-')[0];\n\n let offsets;\n if (isNumeric(+offset)) {\n offsets = [+offset, 0];\n } else {\n offsets = parseOffset(offset, popper, reference, basePlacement);\n }\n\n if (basePlacement === 'left') {\n popper.top += offsets[0];\n popper.left -= offsets[1];\n } else if (basePlacement === 'right') {\n popper.top += offsets[0];\n popper.left += offsets[1];\n } else if (basePlacement === 'top') {\n popper.left += offsets[0];\n popper.top -= offsets[1];\n } else if (basePlacement === 'bottom') {\n popper.left += offsets[0];\n popper.top += offsets[1];\n }\n\n data.popper = popper;\n return data;\n}\n","import getClientRect from '../utils/getClientRect';\nimport getOuterSizes from '../utils/getOuterSizes';\nimport isModifierRequired from '../utils/isModifierRequired';\nimport getStyleComputedProperty from '../utils/getStyleComputedProperty';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function arrow(data, options) {\n // arrow depends on keepTogether in order to work\n if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {\n return data;\n }\n\n let arrowElement = options.element;\n\n // if arrowElement is a string, suppose it's a CSS selector\n if (typeof arrowElement === 'string') {\n arrowElement = data.instance.popper.querySelector(arrowElement);\n\n // if arrowElement is not found, don't run the modifier\n if (!arrowElement) {\n return data;\n }\n } else {\n // if the arrowElement isn't a query selector we must check that the\n // provided DOM node is child of its popper node\n if (!data.instance.popper.contains(arrowElement)) {\n console.warn(\n 'WARNING: `arrow.element` must be child of its popper element!'\n );\n return data;\n }\n }\n\n const placement = data.placement.split('-')[0];\n const { popper, reference } = data.offsets;\n const isVertical = ['left', 'right'].indexOf(placement) !== -1;\n\n const len = isVertical ? 'height' : 'width';\n const sideCapitalized = isVertical ? 'Top' : 'Left';\n const side = sideCapitalized.toLowerCase();\n const altSide = isVertical ? 'left' : 'top';\n const opSide = isVertical ? 'bottom' : 'right';\n const arrowElementSize = getOuterSizes(arrowElement)[len];\n\n //\n // extends keepTogether behavior making sure the popper and its\n // reference have enough pixels in conjunction\n //\n\n // top/left side\n if (reference[opSide] - arrowElementSize < popper[side]) {\n data.offsets.popper[side] -=\n popper[side] - (reference[opSide] - arrowElementSize);\n }\n // bottom/right side\n if (reference[side] + arrowElementSize > popper[opSide]) {\n data.offsets.popper[side] +=\n reference[side] + arrowElementSize - popper[opSide];\n }\n data.offsets.popper = getClientRect(data.offsets.popper);\n\n // compute center of the popper\n const center = reference[side] + reference[len] / 2 - arrowElementSize / 2;\n\n // Compute the sideValue using the updated popper offsets\n // take popper margin in account because we don't have this info available\n const css = getStyleComputedProperty(data.instance.popper);\n const popperMarginSide = parseFloat(css[`margin${sideCapitalized}`], 10);\n const popperBorderSide = parseFloat(css[`border${sideCapitalized}Width`], 10);\n let sideValue =\n center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;\n\n // prevent arrowElement from being placed not contiguously to its popper\n sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);\n\n data.arrowElement = arrowElement;\n data.offsets.arrow = {\n [side]: Math.round(sideValue),\n [altSide]: '', // make sure to unset any eventual altSide value from the DOM node\n };\n\n return data;\n}\n","export default typeof window !== 'undefined' && typeof document !== 'undefined' && typeof navigator !== 'undefined';\n","import isBrowser from './isBrowser';\n\nconst timeoutDuration = (function(){\n const longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];\n for (let i = 0; i < longerTimeoutBrowsers.length; i += 1) {\n if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {\n return 1;\n }\n }\n return 0;\n}());\n\nexport function microtaskDebounce(fn) {\n let called = false\n return () => {\n if (called) {\n return\n }\n called = true\n window.Promise.resolve().then(() => {\n called = false\n fn()\n })\n }\n}\n\nexport function taskDebounce(fn) {\n let scheduled = false;\n return () => {\n if (!scheduled) {\n scheduled = true;\n setTimeout(() => {\n scheduled = false;\n fn();\n }, timeoutDuration);\n }\n };\n}\n\nconst supportsMicroTasks = isBrowser && window.Promise\n\n\n/**\n* Create a debounced version of a method, that's asynchronously deferred\n* but called in the minimum time possible.\n*\n* @method\n* @memberof Popper.Utils\n* @argument {Function} fn\n* @returns {Function}\n*/\nexport default (supportsMicroTasks\n ? microtaskDebounce\n : taskDebounce);\n","import getSupportedPropertyName from '../utils/getSupportedPropertyName';\nimport find from '../utils/find';\nimport getOffsetParent from '../utils/getOffsetParent';\nimport getBoundingClientRect from '../utils/getBoundingClientRect';\nimport getRoundedOffsets from '../utils/getRoundedOffsets';\nimport isBrowser from '../utils/isBrowser';\n\nconst isFirefox = isBrowser && /Firefox/i.test(navigator.userAgent);\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function computeStyle(data, options) {\n const { x, y } = options;\n const { popper } = data.offsets;\n\n // Remove this legacy support in Popper.js v2\n const legacyGpuAccelerationOption = find(\n data.instance.modifiers,\n modifier => modifier.name === 'applyStyle'\n ).gpuAcceleration;\n if (legacyGpuAccelerationOption !== undefined) {\n console.warn(\n 'WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!'\n );\n }\n const gpuAcceleration =\n legacyGpuAccelerationOption !== undefined\n ? legacyGpuAccelerationOption\n : options.gpuAcceleration;\n\n const offsetParent = getOffsetParent(data.instance.popper);\n const offsetParentRect = getBoundingClientRect(offsetParent);\n\n // Styles\n const styles = {\n position: popper.position,\n };\n\n const offsets = getRoundedOffsets(\n data,\n window.devicePixelRatio < 2 || !isFirefox\n );\n\n const sideA = x === 'bottom' ? 'top' : 'bottom';\n const sideB = y === 'right' ? 'left' : 'right';\n\n // if gpuAcceleration is set to `true` and transform is supported,\n // we use `translate3d` to apply the position to the popper we\n // automatically use the supported prefixed version if needed\n const prefixedProperty = getSupportedPropertyName('transform');\n\n // now, let's make a step back and look at this code closely (wtf?)\n // If the content of the popper grows once it's been positioned, it\n // may happen that the popper gets misplaced because of the new content\n // overflowing its reference element\n // To avoid this problem, we provide two options (x and y), which allow\n // the consumer to define the offset origin.\n // If we position a popper on top of a reference element, we can set\n // `x` to `top` to make the popper grow towards its top instead of\n // its bottom.\n let left, top;\n if (sideA === 'bottom') {\n // when offsetParent is <html> the positioning is relative to the bottom of the screen (excluding the scrollbar)\n // and not the bottom of the html element\n if (offsetParent.nodeName === 'HTML') {\n top = -offsetParent.clientHeight + offsets.bottom;\n } else {\n top = -offsetParentRect.height + offsets.bottom;\n }\n } else {\n top = offsets.top;\n }\n if (sideB === 'right') {\n if (offsetParent.nodeName === 'HTML') {\n left = -offsetParent.clientWidth + offsets.right;\n } else {\n left = -offsetParentRect.width + offsets.right;\n }\n } else {\n left = offsets.left;\n }\n if (gpuAcceleration && prefixedProperty) {\n styles[prefixedProperty] = `translate3d(${left}px, ${top}px, 0)`;\n styles[sideA] = 0;\n styles[sideB] = 0;\n styles.willChange = 'transform';\n } else {\n // othwerise, we use the standard `top`, `left`, `bottom` and `right` properties\n const invertTop = sideA === 'bottom' ? -1 : 1;\n const invertLeft = sideB === 'right' ? -1 : 1;\n styles[sideA] = top * invertTop;\n styles[sideB] = left * invertLeft;\n styles.willChange = `${sideA}, ${sideB}`;\n }\n\n // Attributes\n const attributes = {\n 'x-placement': data.placement,\n };\n\n // Update `data` attributes, styles and arrowStyles\n data.attributes = { ...attributes, ...data.attributes };\n data.styles = { ...styles, ...data.styles };\n data.arrowStyles = { ...data.offsets.arrow, ...data.arrowStyles };\n\n return data;\n}\n","import getOppositePlacement from '../utils/getOppositePlacement';\nimport getOppositeVariation from '../utils/getOppositeVariation';\nimport getPopperOffsets from '../utils/getPopperOffsets';\nimport runModifiers from '../utils/runModifiers';\nimport getBoundaries from '../utils/getBoundaries';\nimport isModifierEnabled from '../utils/isModifierEnabled';\nimport clockwise from '../utils/clockwise';\n\nconst BEHAVIORS = {\n FLIP: 'flip',\n CLOCKWISE: 'clockwise',\n COUNTERCLOCKWISE: 'counterclockwise',\n};\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function flip(data, options) {\n // if `inner` modifier is enabled, we can't use the `flip` modifier\n if (isModifierEnabled(data.instance.modifiers, 'inner')) {\n return data;\n }\n\n if (data.flipped && data.placement === data.originalPlacement) {\n // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides\n return data;\n }\n\n const boundaries = getBoundaries(\n data.instance.popper,\n data.instance.reference,\n options.padding,\n options.boundariesElement,\n data.positionFixed\n );\n\n let placement = data.placement.split('-')[0];\n let placementOpposite = getOppositePlacement(placement);\n let variation = data.placement.split('-')[1] || '';\n\n let flipOrder = [];\n\n switch (options.behavior) {\n case BEHAVIORS.FLIP:\n flipOrder = [placement, placementOpposite];\n break;\n case BEHAVIORS.CLOCKWISE:\n flipOrder = clockwise(placement);\n break;\n case BEHAVIORS.COUNTERCLOCKWISE:\n flipOrder = clockwise(placement, true);\n break;\n default:\n flipOrder = options.behavior;\n }\n\n flipOrder.forEach((step, index) => {\n if (placement !== step || flipOrder.length === index + 1) {\n return data;\n }\n\n placement = data.placement.split('-')[0];\n placementOpposite = getOppositePlacement(placement);\n\n const popperOffsets = data.offsets.popper;\n const refOffsets = data.offsets.reference;\n\n // using floor because the reference offsets may contain decimals we are not going to consider here\n const floor = Math.floor;\n const overlapsRef =\n (placement === 'left' &&\n floor(popperOffsets.right) > floor(refOffsets.left)) ||\n (placement === 'right' &&\n floor(popperOffsets.left) < floor(refOffsets.right)) ||\n (placement === 'top' &&\n floor(popperOffsets.bottom) > floor(refOffsets.top)) ||\n (placement === 'bottom' &&\n floor(popperOffsets.top) < floor(refOffsets.bottom));\n\n const overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);\n const overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);\n const overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);\n const overflowsBottom =\n floor(popperOffsets.bottom) > floor(boundaries.bottom);\n\n const overflowsBoundaries =\n (placement === 'left' && overflowsLeft) ||\n (placement === 'right' && overflowsRight) ||\n (placement === 'top' && overflowsTop) ||\n (placement === 'bottom' && overflowsBottom);\n\n // flip the variation if required\n const isVertical = ['top', 'bottom'].indexOf(placement) !== -1;\n\n // flips variation if reference element overflows boundaries\n const flippedVariationByRef =\n !!options.flipVariations &&\n ((isVertical && variation === 'start' && overflowsLeft) ||\n (isVertical && variation === 'end' && overflowsRight) ||\n (!isVertical && variation === 'start' && overflowsTop) ||\n (!isVertical && variation === 'end' && overflowsBottom));\n\n // flips variation if popper content overflows boundaries\n const flippedVariationByContent =\n !!options.flipVariationsByContent &&\n ((isVertical && variation === 'start' && overflowsRight) ||\n (isVertical && variation === 'end' && overflowsLeft) ||\n (!isVertical && variation === 'start' && overflowsBottom) ||\n (!isVertical && variation === 'end' && overflowsTop));\n\n const flippedVariation = flippedVariationByRef || flippedVariationByContent;\n\n if (overlapsRef || overflowsBoundaries || flippedVariation) {\n // this boolean to detect any flip loop\n data.flipped = true;\n\n if (overlapsRef || overflowsBoundaries) {\n placement = flipOrder[index + 1];\n }\n\n if (flippedVariation) {\n variation = getOppositeVariation(variation);\n }\n\n data.placement = placement + (variation ? '-' + variation : '');\n\n // this object contains `position`, we want to preserve it along with\n // any additional property we may add in the future\n data.offsets.popper = {\n ...data.offsets.popper,\n ...getPopperOffsets(\n data.instance.popper,\n data.offsets.reference,\n data.placement\n ),\n };\n\n data = runModifiers(data.instance.modifiers, data, 'flip');\n }\n });\n return data;\n}\n","// Utils\nimport debounce from './utils/debounce';\nimport isFunction from './utils/isFunction';\n\n// Methods\nimport update from './methods/update';\nimport destroy from './methods/destroy';\nimport enableEventListeners from './methods/enableEventListeners';\nimport disableEventListeners from './methods/disableEventListeners';\nimport Defaults from './methods/defaults';\nimport placements from './methods/placements';\n\nexport default class Popper {\n /**\n * Creates a new Popper.js instance.\n * @class Popper\n * @param {Element|referenceObject} reference - The reference element used to position the popper\n * @param {Element} popper - The HTML / XML element used as the popper\n * @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)\n * @return {Object} instance - The generated Popper.js instance\n */\n constructor(reference, popper, options = {}) {\n // make update() debounced, so that it only runs at most once-per-tick\n this.update = debounce(this.update.bind(this));\n\n // with {} we create a new object with the options inside it\n this.options = { ...Popper.Defaults, ...options };\n\n // init state\n this.state = {\n isDestroyed: false,\n isCreated: false,\n scrollParents: [],\n };\n\n // get reference and popper elements (allow jQuery wrappers)\n this.reference = reference && reference.jquery ? reference[0] : reference;\n this.popper = popper && popper.jquery ? popper[0] : popper;\n\n // Deep merge modifiers options\n this.options.modifiers = {};\n Object.keys({\n ...Popper.Defaults.modifiers,\n ...options.modifiers,\n }).forEach(name => {\n this.options.modifiers[name] = {\n // If it's a built-in modifier, use it as base\n ...(Popper.Defaults.modifiers[name] || {}),\n // If there are custom options, override and merge with default ones\n ...(options.modifiers ? options.modifiers[name] : {}),\n };\n });\n\n // Refactoring modifiers' list (Object => Array)\n this.modifiers = Object.keys(this.options.modifiers)\n .map(name => ({\n name,\n ...this.options.modifiers[name],\n }))\n // sort the modifiers by order\n .sort((a, b) => a.order - b.order);\n\n // modifiers have the ability to execute arbitrary code when Popper.js get inited\n // such code is executed in the same order of its modifier\n // they could add new properties to their options configuration\n // BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`!\n this.modifiers.forEach(modifierOptions => {\n if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) {\n modifierOptions.onLoad(\n this.reference,\n this.popper,\n this.options,\n modifierOptions,\n this.state\n );\n }\n });\n\n // fire the first update to position the popper in the right place\n this.update();\n\n const eventsEnabled = this.options.eventsEnabled;\n if (eventsEnabled) {\n // setup event listeners, they will take care of update the position in specific situations\n this.enableEventListeners();\n }\n\n this.state.eventsEnabled = eventsEnabled;\n }\n\n // We can't use class properties because they don't get listed in the\n // class prototype and break stuff like Sinon stubs\n update() {\n return update.call(this);\n }\n destroy() {\n return destroy.call(this);\n }\n enableEventListeners() {\n return enableEventListeners.call(this);\n }\n disableEventListeners() {\n return disableEventListeners.call(this);\n }\n\n /**\n * Schedules an update. It will run on the next UI update available.\n * @method scheduleUpdate\n * @memberof Popper\n */\n scheduleUpdate = () => requestAnimationFrame(this.update);\n\n /**\n * Collection of utilities useful when writing custom modifiers.\n * Starting from version 1.7, this method is available only if you\n * include `popper-utils.js` before `popper.js`.\n *\n * **DEPRECATION**: This way to access PopperUtils is deprecated\n * and will be removed in v2! Use the PopperUtils module directly instead.\n * Due to the high instability of the methods contained in Utils, we can't\n * guarantee them to follow semver. Use them at your own risk!\n * @static\n * @private\n * @type {Object}\n * @deprecated since version 1.8\n * @member Utils\n * @memberof Popper\n */\n static Utils = (typeof window !== 'undefined' ? window : global).PopperUtils;\n\n static placements = placements;\n\n static Defaults = Defaults;\n}\n\n/**\n * The `referenceObject` is an object that provides an interface compatible with Popper.js\n * and lets you use it as replacement of a real DOM node.<br />\n * You can use this method to position a popper relatively to a set of coordinates\n * in case you don't have a DOM node to use as reference.\n *\n * ```\n * new Popper(referenceObject, popperNode);\n * ```\n *\n * NB: This feature isn't supported in Internet Explorer 10.\n * @name referenceObject\n * @property {Function} data.getBoundingClientRect\n * A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method.\n * @property {number} data.clientWidth\n * An ES6 getter that will return the width of the virtual reference element.\n * @property {number} data.clientHeight\n * An ES6 getter that will return the height of the virtual reference element.\n */\n","import modifiers from '../modifiers/index';\n\n/**\n * Default options provided to Popper.js constructor.<br />\n * These can be overridden using the `options` argument of Popper.js.<br />\n * To override an option, simply pass an object with the same\n * structure of the `options` object, as the 3rd argument. For example:\n * ```\n * new Popper(ref, pop, {\n * modifiers: {\n * preventOverflow: { enabled: false }\n * }\n * })\n * ```\n * @type {Object}\n * @static\n * @memberof Popper\n */\nexport default {\n /**\n * Popper's placement.\n * @prop {Popper.placements} placement='bottom'\n */\n placement: 'bottom',\n\n /**\n * Set this to true if you want popper to position it self in 'fixed' mode\n * @prop {Boolean} positionFixed=false\n */\n positionFixed: false,\n\n /**\n * Whether events (resize, scroll) are initially enabled.\n * @prop {Boolean} eventsEnabled=true\n */\n eventsEnabled: true,\n\n /**\n * Set to true if you want to automatically remove the popper when\n * you call the `destroy` method.\n * @prop {Boolean} removeOnDestroy=false\n */\n removeOnDestroy: false,\n\n /**\n * Callback called when the popper is created.<br />\n * By default, it is set to no-op.<br />\n * Access Popper.js instance with `data.instance`.\n * @prop {onCreate}\n */\n onCreate: () => {},\n\n /**\n * Callback called when the popper is updated. This callback is not called\n * on the initialization/creation of the popper, but only on subsequent\n * updates.<br />\n * By default, it is set to no-op.<br />\n * Access Popper.js instance with `data.instance`.\n * @prop {onUpdate}\n */\n onUpdate: () => {},\n\n /**\n * List of modifiers used to modify the offsets before they are applied to the popper.\n * They provide most of the functionalities of Popper.js.\n * @prop {modifiers}\n */\n modifiers,\n};\n\n/**\n * @callback onCreate\n * @param {dataObject} data\n */\n\n/**\n * @callback onUpdate\n * @param {dataObject} data\n */\n","import applyStyle, { applyStyleOnLoad } from './applyStyle';\nimport computeStyle from './computeStyle';\nimport arrow from './arrow';\nimport flip from './flip';\nimport keepTogether from './keepTogether';\nimport offset from './offset';\nimport preventOverflow from './preventOverflow';\nimport shift from './shift';\nimport hide from './hide';\nimport inner from './inner';\n\n/**\n * Modifier function, each modifier can have a function of this type assigned\n * to its `fn` property.<br />\n * These functions will be called on each update, this means that you must\n * make sure they are performant enough to avoid performance bottlenecks.\n *\n * @function ModifierFn\n * @argument {dataObject} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {dataObject} The data object, properly modified\n */\n\n/**\n * Modifiers are plugins used to alter the behavior of your poppers.<br />\n * Popper.js uses a set of 9 modifiers to provide all the basic functionalities\n * needed by the library.\n *\n * Usually you don't want to override the `order`, `fn` and `onLoad` props.\n * All the other properties are configurations that could be tweaked.\n * @namespace modifiers\n */\nexport default {\n /**\n * Modifier used to shift the popper on the start or end of its reference\n * element.<br />\n * It will read the variation of the `placement` property.<br />\n * It can be one either `-end` or `-start`.\n * @memberof modifiers\n * @inner\n */\n shift: {\n /** @prop {number} order=100 - Index used to define the order of execution */\n order: 100,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: shift,\n },\n\n /**\n * The `offset` modifier can shift your popper on both its axis.\n *\n * It accepts the following units:\n * - `px` or unit-less, interpreted as pixels\n * - `%` or `%r`, percentage relative to the length of the reference element\n * - `%p`, percentage relative to the length of the popper element\n * - `vw`, CSS viewport width unit\n * - `vh`, CSS viewport height unit\n *\n * For length is intended the main axis relative to the placement of the popper.<br />\n * This means that if the placement is `top` or `bottom`, the length will be the\n * `width`. In case of `left` or `right`, it will be the `height`.\n *\n * You can provide a single value (as `Number` or `String`), or a pair of values\n * as `String` divided by a comma or one (or more) white spaces.<br />\n * The latter is a deprecated method because it leads to confusion and will be\n * removed in v2.<br />\n * Additionally, it accepts additions and subtractions between different units.\n * Note that multiplications and divisions aren't supported.\n *\n * Valid examples are:\n * ```\n * 10\n * '10%'\n * '10, 10'\n * '10%, 10'\n * '10 + 10%'\n * '10 - 5vh + 3%'\n * '-10px + 5vh, 5px - 6%'\n * ```\n * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap\n * > with their reference element, unfortunately, you will have to disable the `flip` modifier.\n * > You can read more on this at this [issue](https://github.com/FezVrasta/popper.js/issues/373).\n *\n * @memberof modifiers\n * @inner\n */\n offset: {\n /** @prop {number} order=200 - Index used to define the order of execution */\n order: 200,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: offset,\n /** @prop {Number|String} offset=0\n * The offset value as described in the modifier description\n */\n offset: 0,\n },\n\n /**\n * Modifier used to prevent the popper from being positioned outside the boundary.\n *\n * A scenario exists where the reference itself is not within the boundaries.<br />\n * We can say it has \"escaped the boundaries\" — or just \"escaped\".<br />\n * In this case we need to decide whether the popper should either:\n *\n * - detach from the reference and remain \"trapped\" in the boundaries, or\n * - if it should ignore the boundary and \"escape with its reference\"\n *\n * When `escapeWithReference` is set to`true` and reference is completely\n * outside its boundaries, the popper will overflow (or completely leave)\n * the boundaries in order to remain attached to the edge of the reference.\n *\n * @memberof modifiers\n * @inner\n */\n preventOverflow: {\n /** @prop {number} order=300 - Index used to define the order of execution */\n order: 300,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: preventOverflow,\n /**\n * @prop {Array} [priority=['left','right','top','bottom']]\n * Popper will try to prevent overflow following these priorities by default,\n * then, it could overflow on the left and on top of the `boundariesElement`\n */\n priority: ['left', 'right', 'top', 'bottom'],\n /**\n * @prop {number} padding=5\n * Amount of pixel used to define a minimum distance between the boundaries\n * and the popper. This makes sure the popper always has a little padding\n * between the edges of its container\n */\n padding: 5,\n /**\n * @prop {String|HTMLElement} boundariesElement='scrollParent'\n * Boundaries used by the modifier. Can be `scrollParent`, `window`,\n * `viewport` or any DOM element.\n */\n boundariesElement: 'scrollParent',\n },\n\n /**\n * Modifier used to make sure the reference and its popper stay near each other\n * without leaving any gap between the two. Especially useful when the arrow is\n * enabled and you want to ensure that it points to its reference element.\n * It cares only about the first axis. You can still have poppers with margin\n * between the popper and its reference element.\n * @memberof modifiers\n * @inner\n */\n keepTogether: {\n /** @prop {number} order=400 - Index used to define the order of execution */\n order: 400,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: keepTogether,\n },\n\n /**\n * This modifier is used to move the `arrowElement` of the popper to make\n * sure it is positioned between the reference element and its popper element.\n * It will read the outer size of the `arrowElement` node to detect how many\n * pixels of conjunction are needed.\n *\n * It has no effect if no `arrowElement` is provided.\n * @memberof modifiers\n * @inner\n */\n arrow: {\n /** @prop {number} order=500 - Index used to define the order of execution */\n order: 500,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: arrow,\n /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */\n element: '[x-arrow]',\n },\n\n /**\n * Modifier used to flip the popper's placement when it starts to overlap its\n * reference element.\n *\n * Requires the `preventOverflow` modifier before it in order to work.\n *\n * **NOTE:** this modifier will interrupt the current update cycle and will\n * restart it if it detects the need to flip the placement.\n * @memberof modifiers\n * @inner\n */\n flip: {\n /** @prop {number} order=600 - Index used to define the order of execution */\n order: 600,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: flip,\n /**\n * @prop {String|Array} behavior='flip'\n * The behavior used to change the popper's placement. It can be one of\n * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid\n * placements (with optional variations)\n */\n behavior: 'flip',\n /**\n * @prop {number} padding=5\n * The popper will flip if it hits the edges of the `boundariesElement`\n */\n padding: 5,\n /**\n * @prop {String|HTMLElement} boundariesElement='viewport'\n * The element which will define the boundaries of the popper position.\n * The popper will never be placed outside of the defined boundaries\n * (except if `keepTogether` is enabled)\n */\n boundariesElement: 'viewport',\n /**\n * @prop {Boolean} flipVariations=false\n * The popper will switch placement variation between `-start` and `-end` when\n * the reference element overlaps its boundaries.\n *\n * The original placement should have a set variation.\n */\n flipVariations: false,\n /**\n * @prop {Boolean} flipVariationsByContent=false\n * The popper will switch placement variation between `-start` and `-end` when\n * the popper element overlaps its reference boundaries.\n *\n * The original placement should have a set variation.\n */\n flipVariationsByContent: false,\n },\n\n /**\n * Modifier used to make the popper flow toward the inner of the reference element.\n * By default, when this modifier is disabled, the popper will be placed outside\n * the reference element.\n * @memberof modifiers\n * @inner\n */\n inner: {\n /** @prop {number} order=700 - Index used to define the order of execution */\n order: 700,\n /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */\n enabled: false,\n /** @prop {ModifierFn} */\n fn: inner,\n },\n\n /**\n * Modifier used to hide the popper when its reference element is outside of the\n * popper boundaries. It will set a `x-out-of-boundaries` attribute which can\n * be used to hide with a CSS selector the popper when its reference is\n * out of boundaries.\n *\n * Requires the `preventOverflow` modifier before it in order to work.\n * @memberof modifiers\n * @inner\n */\n hide: {\n /** @prop {number} order=800 - Index used to define the order of execution */\n order: 800,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: hide,\n },\n\n /**\n * Computes the style that will be applied to the popper element to gets\n * properly positioned.\n *\n * Note that this modifier will not touch the DOM, it just prepares the styles\n * so that `applyStyle` modifier can apply it. This separation is useful\n * in case you need to replace `applyStyle` with a custom implementation.\n *\n * This modifier has `850` as `order` value to maintain backward compatibility\n * with previous versions of Popper.js. Expect the modifiers ordering method\n * to change in future major versions of the library.\n *\n * @memberof modifiers\n * @inner\n */\n computeStyle: {\n /** @prop {number} order=850 - Index used to define the order of execution */\n order: 850,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: computeStyle,\n /**\n * @prop {Boolean} gpuAcceleration=true\n * If true, it uses the CSS 3D transformation to position the popper.\n * Otherwise, it will use the `top` and `left` properties\n */\n gpuAcceleration: true,\n /**\n * @prop {string} [x='bottom']\n * Where to anchor the X axis (`bottom` or `top`). AKA X offset origin.\n * Change this if your popper should grow in a direction different from `bottom`\n */\n x: 'bottom',\n /**\n * @prop {string} [x='left']\n * Where to anchor the Y axis (`left` or `right`). AKA Y offset origin.\n * Change this if your popper should grow in a direction different from `right`\n */\n y: 'right',\n },\n\n /**\n * Applies the computed styles to the popper element.\n *\n * All the DOM manipulations are limited to this modifier. This is useful in case\n * you want to integrate Popper.js inside a framework or view library and you\n * want to delegate all the DOM manipulations to it.\n *\n * Note that if you disable this modifier, you must make sure the popper element\n * has its position set to `absolute` before Popper.js can do its work!\n *\n * Just disable this modifier and define your own to achieve the desired effect.\n *\n * @memberof modifiers\n * @inner\n */\n applyStyle: {\n /** @prop {number} order=900 - Index used to define the order of execution */\n order: 900,\n /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n enabled: true,\n /** @prop {ModifierFn} */\n fn: applyStyle,\n /** @prop {Function} */\n onLoad: applyStyleOnLoad,\n /**\n * @deprecated since version 1.10.0, the property moved to `computeStyle` modifier\n * @prop {Boolean} gpuAcceleration=true\n * If true, it uses the CSS 3D transformation to position the popper.\n * Otherwise, it will use the `top` and `left` properties\n */\n gpuAcceleration: undefined,\n },\n};\n\n/**\n * The `dataObject` is an object containing all the information used by Popper.js.\n * This object is passed to modifiers and to the `onCreate` and `onUpdate` callbacks.\n * @name dataObject\n * @property {Object} data.instance The Popper.js instance\n * @property {String} data.placement Placement applied to popper\n * @property {String} data.originalPlacement Placement originally defined on init\n * @property {Boolean} data.flipped True if popper has been flipped by flip modifier\n * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper\n * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier\n * @property {Object} data.styles Any CSS property defined here will be applied to the popper. It expects the JavaScript nomenclature (eg. `marginBottom`)\n * @property {Object} data.arrowStyles Any CSS property defined here will be applied to the popper arrow. It expects the JavaScript nomenclature (eg. `marginBottom`)\n * @property {Object} data.boundaries Offsets of the popper boundaries\n * @property {Object} data.offsets The measurements of popper, reference and arrow elements\n * @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values\n * @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values\n * @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0\n */\n","/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function shift(data) {\n const placement = data.placement;\n const basePlacement = placement.split('-')[0];\n const shiftvariation = placement.split('-')[1];\n\n // if shift shiftvariation is specified, run the modifier\n if (shiftvariation) {\n const { reference, popper } = data.offsets;\n const isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;\n const side = isVertical ? 'left' : 'top';\n const measurement = isVertical ? 'width' : 'height';\n\n const shiftOffsets = {\n start: { [side]: reference[side] },\n end: {\n [side]: reference[side] + reference[measurement] - popper[measurement],\n },\n };\n\n data.offsets.popper = { ...popper, ...shiftOffsets[shiftvariation] };\n }\n\n return data;\n}\n","import getOffsetParent from '../utils/getOffsetParent';\nimport getBoundaries from '../utils/getBoundaries';\nimport getSupportedPropertyName from '../utils/getSupportedPropertyName';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function preventOverflow(data, options) {\n let boundariesElement =\n options.boundariesElement || getOffsetParent(data.instance.popper);\n\n // If offsetParent is the reference element, we really want to\n // go one step up and use the next offsetParent as reference to\n // avoid to make this modifier completely useless and look like broken\n if (data.instance.reference === boundariesElement) {\n boundariesElement = getOffsetParent(boundariesElement);\n }\n\n // NOTE: DOM access here\n // resets the popper's position so that the document size can be calculated excluding\n // the size of the popper element itself\n const transformProp = getSupportedPropertyName('transform');\n const popperStyles = data.instance.popper.style; // assignment to help minification\n const { top, left, [transformProp]: transform } = popperStyles;\n popperStyles.top = '';\n popperStyles.left = '';\n popperStyles[transformProp] = '';\n\n const boundaries = getBoundaries(\n data.instance.popper,\n data.instance.reference,\n options.padding,\n boundariesElement,\n data.positionFixed\n );\n\n // NOTE: DOM access here\n // restores the original style properties after the offsets have been computed\n popperStyles.top = top;\n popperStyles.left = left;\n popperStyles[transformProp] = transform;\n\n options.boundaries = boundaries;\n\n const order = options.priority;\n let popper = data.offsets.popper;\n\n const check = {\n primary(placement) {\n let value = popper[placement];\n if (\n popper[placement] < boundaries[placement] &&\n !options.escapeWithReference\n ) {\n value = Math.max(popper[placement], boundaries[placement]);\n }\n return { [placement]: value };\n },\n secondary(placement) {\n const mainSide = placement === 'right' ? 'left' : 'top';\n let value = popper[mainSide];\n if (\n popper[placement] > boundaries[placement] &&\n !options.escapeWithReference\n ) {\n value = Math.min(\n popper[mainSide],\n boundaries[placement] -\n (placement === 'right' ? popper.width : popper.height)\n );\n }\n return { [mainSide]: value };\n },\n };\n\n order.forEach(placement => {\n const side =\n ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';\n popper = { ...popper, ...check[side](placement) };\n });\n\n data.offsets.popper = popper;\n\n return data;\n}\n","/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function keepTogether(data) {\n const { popper, reference } = data.offsets;\n const placement = data.placement.split('-')[0];\n const floor = Math.floor;\n const isVertical = ['top', 'bottom'].indexOf(placement) !== -1;\n const side = isVertical ? 'right' : 'bottom';\n const opSide = isVertical ? 'left' : 'top';\n const measurement = isVertical ? 'width' : 'height';\n\n if (popper[side] < floor(reference[opSide])) {\n data.offsets.popper[opSide] =\n floor(reference[opSide]) - popper[measurement];\n }\n if (popper[opSide] > floor(reference[side])) {\n data.offsets.popper[opSide] = floor(reference[side]);\n }\n\n return data;\n}\n","import getClientRect from '../utils/getClientRect';\nimport getOppositePlacement from '../utils/getOppositePlacement';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function inner(data) {\n const placement = data.placement;\n const basePlacement = placement.split('-')[0];\n const { popper, reference } = data.offsets;\n const isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;\n\n const subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;\n\n popper[isHoriz ? 'left' : 'top'] =\n reference[basePlacement] -\n (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);\n\n data.placement = getOppositePlacement(placement);\n data.offsets.popper = getClientRect(popper);\n\n return data;\n}\n","import isModifierRequired from '../utils/isModifierRequired';\nimport find from '../utils/find';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function hide(data) {\n if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {\n return data;\n }\n\n const refRect = data.offsets.reference;\n const bound = find(\n data.instance.modifiers,\n modifier => modifier.name === 'preventOverflow'\n ).boundaries;\n\n if (\n refRect.bottom < bound.top ||\n refRect.left > bound.right ||\n refRect.top > bound.bottom ||\n refRect.right < bound.left\n ) {\n // Avoid unnecessary DOM access if visibility hasn't changed\n if (data.hide === true) {\n return data;\n }\n\n data.hide = true;\n data.attributes['x-out-of-boundaries'] = '';\n } else {\n // Avoid unnecessary DOM access if visibility hasn't changed\n if (data.hide === false) {\n return data;\n }\n\n data.hide = false;\n data.attributes['x-out-of-boundaries'] = false;\n }\n\n return data;\n}\n","import setStyles from '../utils/setStyles';\nimport setAttributes from '../utils/setAttributes';\nimport getReferenceOffsets from '../utils/getReferenceOffsets';\nimport computeAutoPlacement from '../utils/computeAutoPlacement';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} data.styles - List of style properties - values to apply to popper element\n * @argument {Object} data.attributes - List of attribute properties - values to apply to popper element\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The same data object\n */\nexport default function applyStyle(data) {\n // any property present in `data.styles` will be applied to the popper,\n // in this way we can make the 3rd party modifiers add custom styles to it\n // Be aware, modifiers could override the properties defined in the previous\n // lines of this modifier!\n setStyles(data.instance.popper, data.styles);\n\n // any property present in `data.attributes` will be applied to the popper,\n // they will be set as HTML attributes of the element\n setAttributes(data.instance.popper, data.attributes);\n\n // if arrowElement is defined and arrowStyles has some properties\n if (data.arrowElement && Object.keys(data.arrowStyles).length) {\n setStyles(data.arrowElement, data.arrowStyles);\n }\n\n return data;\n}\n\n/**\n * Set the x-placement attribute before everything else because it could be used\n * to add margins to the popper margins needs to be calculated to get the\n * correct popper offsets.\n * @method\n * @memberof Popper.modifiers\n * @param {HTMLElement} reference - The reference element used to position the popper\n * @param {HTMLElement} popper - The HTML element used as popper\n * @param {Object} options - Popper.js options\n */\nexport function applyStyleOnLoad(\n reference,\n popper,\n options,\n modifierOptions,\n state\n) {\n // compute reference element offsets\n const referenceOffsets = getReferenceOffsets(state, popper, reference, options.positionFixed);\n\n // compute auto placement, store placement inside the data object,\n // modifiers will be able to edit `placement` if needed\n // and refer to originalPlacement to know the original value\n const placement = computeAutoPlacement(\n options.placement,\n referenceOffsets,\n popper,\n reference,\n options.modifiers.flip.boundariesElement,\n options.modifiers.flip.padding\n );\n\n popper.setAttribute('x-placement', placement);\n\n // Apply `position` to popper before anything else because\n // without the position applied we can't guarantee correct computations\n setStyles(popper, { position: options.positionFixed ? 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\ No newline at end of file
+{"version":3,"file":"popper.min.js","sources":["../../src/dom-utils/getBoundingClientRect.js","../../src/dom-utils/getWindow.js","../../src/dom-utils/getWindowScroll.js","../../src/dom-utils/instanceOf.js","../../src/dom-utils/getNodeName.js","../../src/dom-utils/getDocumentElement.js","../../src/dom-utils/getWindowScrollBarX.js","../../src/dom-utils/getCompositeRect.js","../../src/dom-utils/getNodeScroll.js","../../src/dom-utils/getHTMLElementScroll.js","../../src/dom-utils/getLayoutRect.js","../../src/dom-utils/getParentNode.js","../../src/dom-utils/getComputedStyle.js","../../src/dom-utils/listScrollParents.js","../../src/dom-utils/getScrollParent.js","../../src/dom-utils/getOffsetParent.js","../../src/dom-utils/isTableElement.js","../../src/utils/orderModifiers.js","../../src/utils/debounce.js","../../src/utils/getBasePlacement.js","../../src/index.js","../../src/utils/mergeByName.js","../../src/utils/getMainAxisFromPlacement.js","../../src/utils/computeOffsets.js","../../src/utils/getVariation.js","../../src/enums.js","../../src/modifiers/computeStyles.js","../../src/utils/getOppositePlacement.js","../../src/utils/getOppositeVariationPlacement.js","../../src/dom-utils/contains.js","../../src/utils/rectToClientRect.js","../../src/dom-utils/getClippingRect.js","../../src/dom-utils/getViewportRect.js","../../src/dom-utils/getDocumentRect.js","../../src/dom-utils/getDecorations.js","../../src/dom-utils/getBorders.js","../../src/utils/mergePaddingObject.js","../../src/utils/getFreshSideObject.js","../../src/utils/expandToHashMap.js","../../src/utils/detectOverflow.js","../../src/modifiers/hide.js","../../src/modifiers/eventListeners.js","../../src/popper.js","../../src/modifiers/popperOffsets.js","../../src/modifiers/applyStyles.js","../../src/modifiers/offset.js","../../src/modifiers/flip.js","../../src/utils/computeAutoPlacement.js","../../src/modifiers/preventOverflow.js","../../src/utils/getAltAxis.js","../../src/utils/within.js","../../src/modifiers/arrow.js"],"sourcesContent":["// @flow\nimport type { ClientRectObject, VirtualElement } from '../types';\n\nexport default function getBoundingClientRect(\n element: Element | VirtualElement\n): ClientRectObject {\n const rect = element.getBoundingClientRect();\n\n return {\n width: rect.width,\n height: rect.height,\n top: rect.top,\n right: rect.right,\n bottom: rect.bottom,\n left: rect.left,\n x: rect.left,\n y: rect.top,\n };\n}\n","// @flow\n/*:: import type { Window } from '../types'; */\n/*:: declare function getWindow(node: Node | Window): Window; */\n\nexport default function getWindow(node) {\n if (node.toString() !== '[object Window]') {\n const ownerDocument = node.ownerDocument;\n return ownerDocument ? ownerDocument.defaultView : window;\n }\n\n return node;\n}\n","// @flow\nimport getWindow from './getWindow';\nimport type { Window } from '../types';\n\nexport default function getWindowScroll(node: Node | Window) {\n const win = getWindow(node);\n const scrollLeft = win.pageXOffset;\n const scrollTop = win.pageYOffset;\n\n return {\n scrollLeft,\n scrollTop,\n };\n}\n","// @flow\nimport getWindow from './getWindow';\n\n/*:: declare function isElement(node: mixed): boolean %checks(node instanceof\n Element); */\n\nfunction isElement(node) {\n const OwnElement = getWindow(node).Element;\n return node instanceof OwnElement;\n}\n\n/*:: declare function isHTMLElement(node: mixed): boolean %checks(node instanceof\n HTMLElement); */\n\nfunction isHTMLElement(node) {\n const OwnElement = getWindow(node).HTMLElement;\n return node instanceof OwnElement;\n}\n\nexport { isElement, isHTMLElement };\n","// @flow\nimport type { Window } from '../types';\n\nexport default function getNodeName(element: ?Node | Window): ?string {\n return element ? (element.nodeName || '').toLowerCase() : null;\n}\n","// @flow\nimport { isElement } from './instanceOf';\nimport type { Window } from '../types';\n\nexport default function getDocumentElement(\n element: Element | Window\n): HTMLElement {\n // $FlowFixMe: assume body is always available\n return (isElement(element) ? element.ownerDocument : element.document)\n .documentElement;\n}\n","// @flow\nimport getBoundingClientRect from './getBoundingClientRect';\nimport getDocumentElement from './getDocumentElement';\nimport getWindowScroll from './getWindowScroll';\n\nexport default function getWindowScrollBarX(element: Element): number {\n // If <html> has a CSS width greater than the viewport, then this will be\n // incorrect for RTL.\n // Popper 1 is broken in this case and never had a bug report so let's assume\n // it's not an issue. I don't think anyone ever specifies width on <html>\n // anyway.\n // Browsers where the left scrollbar doesn't cause an issue report `0` for\n // this (e.g. Edge 2019, IE11, Safari)\n return (\n getBoundingClientRect(getDocumentElement(element)).left +\n getWindowScroll(element).scrollLeft\n );\n}\n","// @flow\nimport type { Rect, VirtualElement, Window } from '../types';\nimport getBoundingClientRect from './getBoundingClientRect';\nimport getNodeScroll from './getNodeScroll';\nimport getNodeName from './getNodeName';\nimport { isHTMLElement } from './instanceOf';\nimport getWindowScrollBarX from './getWindowScrollBarX';\nimport getDocumentElement from './getDocumentElement';\n\n// Returns the composite rect of an element relative to its offsetParent.\n// Composite means it takes into account transforms as well as layout.\nexport default function getCompositeRect(\n elementOrVirtualElement: Element | VirtualElement,\n offsetParent: Element | Window,\n isFixed: boolean = false\n): Rect {\n let documentElement;\n const rect = getBoundingClientRect(elementOrVirtualElement);\n\n let scroll = { scrollLeft: 0, scrollTop: 0 };\n let offsets = { x: 0, y: 0 };\n\n if (!isFixed) {\n if (getNodeName(offsetParent) !== 'body') {\n scroll = getNodeScroll(offsetParent);\n }\n\n if (isHTMLElement(offsetParent)) {\n offsets = getBoundingClientRect(offsetParent);\n offsets.x += offsetParent.clientLeft;\n offsets.y += offsetParent.clientTop;\n } else if ((documentElement = getDocumentElement(offsetParent))) {\n offsets.x = getWindowScrollBarX(documentElement);\n }\n }\n\n return {\n x: rect.left + scroll.scrollLeft - offsets.x,\n y: rect.top + scroll.scrollTop - offsets.y,\n width: rect.width,\n height: rect.height,\n };\n}\n","// @flow\nimport getWindowScroll from './getWindowScroll';\nimport getWindow from './getWindow';\nimport { isHTMLElement } from './instanceOf';\nimport getHTMLElementScroll from './getHTMLElementScroll';\nimport type { Window } from '../types';\n\nexport default function getNodeScroll(node: Node | Window) {\n if (node === getWindow(node) || !isHTMLElement(node)) {\n return getWindowScroll(node);\n } else {\n return getHTMLElementScroll(node);\n }\n}\n","// @flow\n\nexport default function getHTMLElementScroll(element: HTMLElement) {\n return {\n scrollLeft: element.scrollLeft,\n scrollTop: element.scrollTop,\n };\n}\n","// @flow\nimport type { Rect } from '../types';\n\n// Returns the layout rect of an element relative to its offsetParent. Layout\n// means it doesn't take into account transforms.\nexport default function getLayoutRect(element: HTMLElement): Rect {\n return {\n x: element.offsetLeft,\n y: element.offsetTop,\n width: element.offsetWidth,\n height: element.offsetHeight,\n };\n}\n","// @flow\nimport getNodeName from './getNodeName';\n\nexport default function getParentNode(element: Node | ShadowRoot): Node {\n if (getNodeName(element) === 'html') {\n return element;\n }\n\n return (\n element.parentNode || // DOM Element detected\n // $FlowFixMe: need a better way to handle this...\n element.host || // ShadowRoot detected\n document.ownerDocument || // Fallback to ownerDocument if available\n document.documentElement // Or to documentElement if everything else fails\n );\n}\n","// @flow\nimport getWindow from './getWindow';\n\nexport default function getComputedStyle(\n element: Element\n): CSSStyleDeclaration {\n return getWindow(element).getComputedStyle(element);\n}\n","// @flow\nimport getScrollParent from './getScrollParent';\nimport getParentNode from './getParentNode';\nimport getNodeName from './getNodeName';\nimport getWindow from './getWindow';\nimport type { Window } from '../types';\n\nexport default function listScrollParents(\n element: Node,\n list: Array<Element | Window> = []\n): Array<Element | Window> {\n const scrollParent = getScrollParent(element);\n const isBody = getNodeName(scrollParent) === 'body';\n const target = isBody ? getWindow(scrollParent) : scrollParent;\n const updatedList = list.concat(target);\n\n return isBody\n ? updatedList\n : // $FlowFixMe: isBody tells us target will be an HTMLElement here\n updatedList.concat(listScrollParents(getParentNode(target)));\n}\n","// @flow\nimport getParentNode from './getParentNode';\nimport getComputedStyle from './getComputedStyle';\nimport getNodeName from './getNodeName';\nimport { isHTMLElement } from './instanceOf';\n\nexport default function getScrollParent(node: Node): HTMLElement {\n if (['html', 'body', '#document'].indexOf(getNodeName(node)) >= 0) {\n // $FlowFixMe: assume body is always available\n return node.ownerDocument.body;\n }\n\n if (isHTMLElement(node)) {\n // Firefox wants us to check `-x` and `-y` variations as well\n const { overflow, overflowX, overflowY } = getComputedStyle(node);\n\n if (/auto|scroll|overlay|hidden/.test(overflow + overflowY + overflowX)) {\n return node;\n }\n }\n\n return getScrollParent(getParentNode(node));\n}\n","// @flow\nimport getWindow from './getWindow';\nimport getNodeName from './getNodeName';\nimport getComputedStyle from './getComputedStyle';\nimport { isHTMLElement } from './instanceOf';\nimport isTableElement from './isTableElement';\n\n// https://stackoverflow.com/a/9851769/2059996\nconst isFirefox = () => typeof window.InstallTrigger !== 'undefined';\n\nfunction getTrueOffsetParent(element: Element): ?Element {\n let offsetParent;\n\n if (\n !isHTMLElement(element) ||\n !(offsetParent = element.offsetParent) ||\n // https://github.com/popperjs/popper-core/issues/837\n (isFirefox() && getComputedStyle(offsetParent).position === 'fixed')\n ) {\n return null;\n }\n\n return offsetParent;\n}\n\nexport default function getOffsetParent(element: Element) {\n const window = getWindow(element);\n\n let offsetParent = getTrueOffsetParent(element);\n\n // Find the nearest non-table offsetParent\n while (offsetParent && isTableElement(offsetParent)) {\n offsetParent = getTrueOffsetParent(offsetParent);\n }\n\n if (\n offsetParent &&\n getNodeName(offsetParent) === 'body' &&\n getComputedStyle(offsetParent).position === 'static'\n ) {\n return window;\n }\n\n return offsetParent || window;\n}\n","// @flow\nimport getNodeName from './getNodeName';\n\nexport default function isTableElement(element: Element): boolean {\n return ['table', 'td', 'th'].indexOf(getNodeName(element)) >= 0;\n}\n","// @flow\nimport type { Modifier } from '../types';\nimport { modifierPhases } from '../enums';\n\n// source: https://stackoverflow.com/questions/49875255\nfunction order(modifiers) {\n const map = new Map();\n const visited = new Set();\n const result = [];\n\n modifiers.forEach(modifier => {\n map.set(modifier.name, modifier);\n });\n\n // On visiting object, check for its dependencies and visit them recursively\n function sort(modifier: Modifier<any>) {\n visited.add(modifier.name);\n\n const requires = [\n ...(modifier.requires || []),\n ...(modifier.requiresIfExists || []),\n ];\n\n requires.forEach(dep => {\n if (!visited.has(dep)) {\n const depModifier = map.get(dep);\n\n if (depModifier) {\n sort(depModifier);\n }\n }\n });\n\n result.push(modifier);\n }\n\n modifiers.forEach(modifier => {\n if (!visited.has(modifier.name)) {\n // check for visited object\n sort(modifier);\n }\n });\n\n return result;\n}\n\nexport default function orderModifiers(\n modifiers: Array<Modifier<any>>\n): Array<Modifier<any>> {\n // order based on dependencies\n const orderedModifiers = order(modifiers);\n\n // order based on phase\n return modifierPhases.reduce((acc, phase) => {\n return acc.concat(\n orderedModifiers.filter(modifier => modifier.phase === phase)\n );\n }, []);\n}\n","// @flow\n\nexport default function debounce<T>(fn: Function): () => Promise<T> {\n let pending;\n return () => {\n if (!pending) {\n pending = new Promise<T>(resolve => {\n Promise.resolve().then(() => {\n pending = undefined;\n resolve(fn());\n });\n });\n }\n\n return pending;\n };\n}\n","// @flow\nimport { type BasePlacement, type Placement, auto } from '../enums';\n\nexport default function getBasePlacement(\n placement: Placement | typeof auto\n): BasePlacement {\n return (placement.split('-')[0]: any);\n}\n","// @flow\nimport type {\n State,\n Options,\n Modifier,\n Instance,\n VirtualElement,\n} from './types';\nimport getCompositeRect from './dom-utils/getCompositeRect';\nimport getLayoutRect from './dom-utils/getLayoutRect';\nimport listScrollParents from './dom-utils/listScrollParents';\nimport getOffsetParent from './dom-utils/getOffsetParent';\nimport getComputedStyle from './dom-utils/getComputedStyle';\nimport orderModifiers from './utils/orderModifiers';\nimport debounce from './utils/debounce';\nimport validateModifiers from './utils/validateModifiers';\nimport uniqueBy from './utils/uniqueBy';\nimport getBasePlacement from './utils/getBasePlacement';\nimport mergeByName from './utils/mergeByName';\nimport { isElement } from './dom-utils/instanceOf';\nimport { auto } from './enums';\n\nexport * from './types';\nexport * from './enums';\n\nconst INVALID_ELEMENT_ERROR =\n 'Popper: Invalid reference or popper argument provided. They must be either a DOM element or virtual element.';\nconst INFINITE_LOOP_ERROR =\n 'Popper: An infinite loop in the modifiers cycle has been detected! The cycle has been interrupted to prevent a browser crash.';\n\nconst DEFAULT_OPTIONS: Options = {\n placement: 'bottom',\n modifiers: [],\n strategy: 'absolute',\n};\n\ntype PopperGeneratorArgs = {\n defaultModifiers?: Array<Modifier<any>>,\n defaultOptions?: $Shape<Options>,\n};\n\nfunction areValidElements(...args: Array<any>): boolean {\n return !args.some(\n element => !(element && typeof element.getBoundingClientRect === 'function')\n );\n}\n\nexport function popperGenerator(generatorOptions: PopperGeneratorArgs = {}) {\n const {\n defaultModifiers = [],\n defaultOptions = DEFAULT_OPTIONS,\n } = generatorOptions;\n\n return function createPopper(\n reference: Element | VirtualElement,\n popper: HTMLElement,\n options: $Shape<Options> = defaultOptions\n ): Instance {\n let state: $Shape<State> = {\n placement: 'bottom',\n orderedModifiers: [],\n options: { ...DEFAULT_OPTIONS, ...defaultOptions },\n modifiersData: {},\n elements: {\n reference,\n popper,\n },\n attributes: {},\n styles: {},\n };\n\n let effectCleanupFns: Array<() => void> = [];\n let isDestroyed = false;\n\n const instance = {\n state,\n setOptions(options) {\n cleanupModifierEffects();\n\n state.options = {\n ...defaultOptions,\n ...state.options,\n ...options,\n };\n\n state.scrollParents = {\n reference: isElement(reference) ? listScrollParents(reference) : [],\n popper: listScrollParents(popper),\n };\n\n // Orders the modifiers based on their dependencies and `phase`\n // properties\n const orderedModifiers = orderModifiers(\n mergeByName([...defaultModifiers, ...state.options.modifiers])\n );\n\n // Strip out disabled modifiers\n state.orderedModifiers = orderedModifiers.filter(m => m.enabled);\n\n // Validate the provided modifiers so that the consumer will get warned\n // if one of the modifiers is invalid for any reason\n if (__DEV__) {\n const modifiers = uniqueBy(\n [...orderedModifiers, ...state.options.modifiers],\n ({ name }) => name\n );\n\n validateModifiers(modifiers);\n\n if (getBasePlacement(state.options.placement) === auto) {\n const flipModifier = state.orderedModifiers.find(\n ({ name }) => name === 'flip'\n );\n\n if (!flipModifier) {\n console.error(\n [\n 'Popper: \"auto\" placements require the \"flip\" modifier be',\n 'present and enabled to work.',\n ].join(' ')\n );\n }\n }\n\n const {\n marginTop,\n marginRight,\n marginBottom,\n marginLeft,\n } = getComputedStyle(popper);\n\n // We no longer take into account `margins` on the popper, and it can\n // cause bugs with positioning, so we'll warn the consumer\n if (\n [marginTop, marginRight, marginBottom, marginLeft].some(margin =>\n parseFloat(margin)\n )\n ) {\n console.warn(\n [\n 'Popper: CSS \"margin\" styles cannot be used to apply padding',\n 'between the popper and its reference element or boundary.',\n 'To replicate margin, use the `offset` modifier, as well as',\n 'the `padding` option in the `preventOverflow` and `flip`',\n 'modifiers.',\n ].join(' ')\n );\n }\n }\n\n runModifierEffects();\n\n return instance.update();\n },\n\n // Sync update – it will always be executed, even if not necessary. This\n // is useful for low frequency updates where sync behavior simplifies the\n // logic.\n // For high frequency updates (e.g. `resize` and `scroll` events), always\n // prefer the async Popper#update method\n forceUpdate() {\n if (isDestroyed) {\n return;\n }\n\n const { reference, popper } = state.elements;\n\n // Don't proceed if `reference` or `popper` are not valid elements\n // anymore\n if (!areValidElements(reference, popper)) {\n if (__DEV__) {\n console.error(INVALID_ELEMENT_ERROR);\n }\n return;\n }\n\n // Store the reference and popper rects to be read by modifiers\n state.rects = {\n reference: getCompositeRect(\n reference,\n getOffsetParent(popper),\n state.options.strategy === 'fixed'\n ),\n popper: getLayoutRect(popper),\n };\n\n // Modifiers have the ability to reset the current update cycle. The\n // most common use case for this is the `flip` modifier changing the\n // placement, which then needs to re-run all the modifiers, because the\n // logic was previously ran for the previous placement and is therefore\n // stale/incorrect\n state.reset = false;\n\n state.placement = state.options.placement;\n\n // On each update cycle, the `modifiersData` property for each modifier\n // is filled with the initial data specified by the modifier. This means\n // it doesn't persist and is fresh on each update.\n // To ensure persistent data, use `${name}#persistent`\n state.orderedModifiers.forEach(\n modifier =>\n (state.modifiersData[modifier.name] = {\n ...modifier.data,\n })\n );\n\n let __debug_loops__ = 0;\n for (let index = 0; index < state.orderedModifiers.length; index++) {\n if (__DEV__) {\n __debug_loops__ += 1;\n if (__debug_loops__ > 100) {\n console.error(INFINITE_LOOP_ERROR);\n break;\n }\n }\n\n if (state.reset === true) {\n state.reset = false;\n index = -1;\n continue;\n }\n\n const { fn, options = {}, name } = state.orderedModifiers[index];\n\n if (typeof fn === 'function') {\n state = fn({ state, options, name, instance }) || state;\n }\n }\n },\n\n // Async and optimistically optimized update – it will not be executed if\n // not necessary (debounced to run at most once-per-tick)\n update: debounce<$Shape<State>>(\n () =>\n new Promise<$Shape<State>>(resolve => {\n instance.forceUpdate();\n resolve(state);\n })\n ),\n\n destroy() {\n cleanupModifierEffects();\n isDestroyed = true;\n },\n };\n\n if (!areValidElements(reference, popper)) {\n if (__DEV__) {\n console.error(INVALID_ELEMENT_ERROR);\n }\n return instance;\n }\n\n instance.setOptions(options).then(state => {\n if (!isDestroyed && options.onFirstUpdate) {\n options.onFirstUpdate(state);\n }\n });\n\n // Modifiers have the ability to execute arbitrary code before the first\n // update cycle runs. They will be executed in the same order as the update\n // cycle. This is useful when a modifier adds some persistent data that\n // other modifiers need to use, but the modifier is run after the dependent\n // one.\n function runModifierEffects() {\n state.orderedModifiers.forEach(({ name, options = {}, effect }) => {\n if (typeof effect === 'function') {\n const cleanupFn = effect({ state, name, instance, options });\n const noopFn = () => {};\n effectCleanupFns.push(cleanupFn || noopFn);\n }\n });\n }\n\n function cleanupModifierEffects() {\n effectCleanupFns.forEach(fn => fn());\n effectCleanupFns = [];\n }\n\n return instance;\n };\n}\n\nexport const createPopper = popperGenerator();\n","// @flow\nimport type { Modifier } from '../types';\n\nexport default function mergeByName(\n modifiers: Array<$Shape<Modifier<any>>>\n): Array<$Shape<Modifier<any>>> {\n const merged = modifiers.reduce((merged, current) => {\n const existing = merged[current.name];\n merged[current.name] = existing\n ? {\n ...existing,\n ...current,\n options: { ...existing.options, ...current.options },\n data: { ...existing.data, ...current.data },\n }\n : current;\n return merged;\n }, {});\n\n // IE11 does not support Object.values\n return Object.keys(merged).map(key => merged[key]);\n}\n","// @flow\nimport type { Placement } from '../enums';\n\nexport default function getMainAxisFromPlacement(\n placement: Placement\n): 'x' | 'y' {\n return ['top', 'bottom'].indexOf(placement) >= 0 ? 'x' : 'y';\n}\n","// @flow\nimport getBasePlacement from './getBasePlacement';\nimport getVariation from './getVariation';\nimport getMainAxisFromPlacement from './getMainAxisFromPlacement';\nimport type {\n Rect,\n PositioningStrategy,\n Offsets,\n ClientRectObject,\n} from '../types';\nimport { top, right, bottom, left, start, end, type Placement } from '../enums';\n\nexport default function computeOffsets({\n reference,\n element,\n placement,\n}: {\n reference: Rect | ClientRectObject,\n element: Rect | ClientRectObject,\n strategy: PositioningStrategy,\n placement?: Placement,\n}): Offsets {\n const basePlacement = placement ? getBasePlacement(placement) : null;\n const variation = placement ? getVariation(placement) : null;\n const commonX = reference.x + reference.width / 2 - element.width / 2;\n const commonY = reference.y + reference.height / 2 - element.height / 2;\n\n let offsets;\n switch (basePlacement) {\n case top:\n offsets = {\n x: commonX,\n y: reference.y - element.height,\n };\n break;\n case bottom:\n offsets = {\n x: commonX,\n y: reference.y + reference.height,\n };\n break;\n case right:\n offsets = {\n x: reference.x + reference.width,\n y: commonY,\n };\n break;\n case left:\n offsets = {\n x: reference.x - element.width,\n y: commonY,\n };\n break;\n default:\n offsets = {\n x: reference.x,\n y: reference.y,\n };\n }\n\n const mainAxis = basePlacement\n ? getMainAxisFromPlacement(basePlacement)\n : null;\n\n if (mainAxis != null) {\n const len = mainAxis === 'y' ? 'height' : 'width';\n\n switch (variation) {\n case start:\n offsets[mainAxis] =\n Math.floor(offsets[mainAxis]) -\n Math.floor(reference[len] / 2 - element[len] / 2);\n break;\n case end:\n offsets[mainAxis] =\n Math.floor(offsets[mainAxis]) +\n Math.ceil(reference[len] / 2 - element[len] / 2);\n break;\n default:\n }\n }\n\n return offsets;\n}\n","// @flow\nimport { type Variation, type Placement } from '../enums';\n\nexport default function getVariation(placement: Placement): ?Variation {\n return (placement.split('-')[1]: any);\n}\n","// @flow\nexport const top: 'top' = 'top';\nexport const bottom: 'bottom' = 'bottom';\nexport const right: 'right' = 'right';\nexport const left: 'left' = 'left';\nexport const auto: 'auto' = 'auto';\nexport type BasePlacement =\n | typeof top\n | typeof bottom\n | typeof right\n | typeof left;\nexport const basePlacements: Array<BasePlacement> = [top, bottom, right, left];\n\nexport const start: 'start' = 'start';\nexport const end: 'end' = 'end';\nexport type Variation = typeof start | typeof end;\n\nexport const clippingParents: 'clippingParents' = 'clippingParents';\nexport const viewport: 'viewport' = 'viewport';\nexport type Boundary =\n | HTMLElement\n | Array<HTMLElement>\n | typeof clippingParents;\nexport type RootBoundary = typeof viewport | 'document';\n\nexport const popper: 'popper' = 'popper';\nexport const reference: 'reference' = 'reference';\nexport type Context = typeof popper | typeof reference;\n\nexport type VariationPlacement =\n | 'top-start'\n | 'top-end'\n | 'bottom-start'\n | 'bottom-end'\n | 'right-start'\n | 'right-end'\n | 'left-start'\n | 'left-end';\nexport type AutoPlacement = 'auto' | 'auto-start' | 'auto-end';\nexport type ComputedPlacement = VariationPlacement | BasePlacement;\nexport type Placement = AutoPlacement | BasePlacement | VariationPlacement;\n\nexport const variationPlacements: Array<VariationPlacement> = basePlacements.reduce(\n (acc: Array<VariationPlacement>, placement: BasePlacement) =>\n acc.concat([(`${placement}-${start}`: any), (`${placement}-${end}`: any)]),\n []\n);\nexport const placements: Array<Placement> = [...basePlacements, auto].reduce(\n (\n acc: Array<Placement>,\n placement: BasePlacement | typeof auto\n ): Array<Placement> =>\n acc.concat([\n placement,\n (`${placement}-${start}`: any),\n (`${placement}-${end}`: any),\n ]),\n []\n);\n\n// modifiers that need to read the DOM\nexport const beforeRead: 'beforeRead' = 'beforeRead';\nexport const read: 'read' = 'read';\nexport const afterRead: 'afterRead' = 'afterRead';\n// pure-logic modifiers\nexport const beforeMain: 'beforeMain' = 'beforeMain';\nexport const main: 'main' = 'main';\nexport const afterMain: 'afterMain' = 'afterMain';\n// modifier with the purpose to write to the DOM (or write into a framework state)\nexport const beforeWrite: 'beforeWrite' = 'beforeWrite';\nexport const write: 'write' = 'write';\nexport const afterWrite: 'afterWrite' = 'afterWrite';\nexport const modifierPhases: Array<ModifierPhases> = [\n beforeRead,\n read,\n afterRead,\n beforeMain,\n main,\n afterMain,\n beforeWrite,\n write,\n afterWrite,\n];\n\nexport type ModifierPhases =\n | typeof beforeRead\n | typeof read\n | typeof afterRead\n | typeof beforeMain\n | typeof main\n | typeof afterMain\n | typeof beforeWrite\n | typeof write\n | typeof afterWrite;\n","// @flow\nimport type {\n PositioningStrategy,\n Offsets,\n Modifier,\n ModifierArguments,\n Rect,\n Window,\n} from '../types';\nimport { type BasePlacement, top, left, right, bottom } from '../enums';\nimport getOffsetParent from '../dom-utils/getOffsetParent';\nimport getWindow from '../dom-utils/getWindow';\nimport getDocumentElement from '../dom-utils/getDocumentElement';\nimport getComputedStyle from '../dom-utils/getComputedStyle';\nimport getBasePlacement from '../utils/getBasePlacement';\n\ntype Options = {\n gpuAcceleration: boolean,\n adaptive: boolean,\n};\n\nconst unsetSides = {\n top: 'auto',\n right: 'auto',\n bottom: 'auto',\n left: 'auto',\n};\n\n// Round the offsets to the nearest suitable subpixel based on the DPR.\n// Zooming can change the DPR, but it seems to report a value that will\n// cleanly divide the values into the appropriate subpixels.\nfunction roundOffsets({ x, y }): Offsets {\n const win: Window = window;\n const dpr = win.devicePixelRatio || 1;\n\n return {\n x: Math.round(x * dpr) / dpr || 0,\n y: Math.round(y * dpr) / dpr || 0,\n };\n}\n\nexport function mapToStyles({\n popper,\n popperRect,\n placement,\n offsets,\n position,\n gpuAcceleration,\n adaptive,\n}: {\n popper: HTMLElement,\n popperRect: Rect,\n placement: BasePlacement,\n offsets: Offsets,\n position: PositioningStrategy,\n gpuAcceleration: boolean,\n adaptive: boolean,\n}) {\n let { x, y } = roundOffsets(offsets);\n\n const hasX = offsets.hasOwnProperty('x');\n const hasY = offsets.hasOwnProperty('y');\n\n let sideX: string = left;\n let sideY: string = top;\n\n const win: Window = window;\n\n if (adaptive) {\n let offsetParent = getOffsetParent(popper);\n if (offsetParent === getWindow(popper)) {\n offsetParent = getDocumentElement(popper);\n }\n\n // $FlowFixMe: force type refinement, we compare offsetParent with window above, but Flow doesn't detect it\n /*:: offsetParent = (offsetParent: Element); */\n\n if (placement === top) {\n sideY = bottom;\n y -= offsetParent.clientHeight - popperRect.height;\n y *= gpuAcceleration ? 1 : -1;\n }\n\n if (placement === left) {\n sideX = right;\n x -= offsetParent.clientWidth - popperRect.width;\n x *= gpuAcceleration ? 1 : -1;\n }\n }\n\n const commonStyles = {\n position,\n ...(adaptive && unsetSides),\n };\n\n if (gpuAcceleration) {\n return {\n ...commonStyles,\n [sideY]: hasY ? '0' : '',\n [sideX]: hasX ? '0' : '',\n // Layer acceleration can disable subpixel rendering which causes slightly\n // blurry text on low PPI displays, so we want to use 2D transforms\n // instead\n transform:\n (win.devicePixelRatio || 1) < 2\n ? `translate(${x}px, ${y}px)`\n : `translate3d(${x}px, ${y}px, 0)`,\n };\n }\n\n return {\n ...commonStyles,\n [sideY]: hasY ? `${y}px` : '',\n [sideX]: hasX ? `${x}px` : '',\n transform: '',\n };\n}\n\nfunction computeStyles({ state, options }: ModifierArguments<Options>) {\n const { gpuAcceleration = true, adaptive = true } = options;\n\n if (__DEV__) {\n const { transitionProperty } = getComputedStyle(state.elements.popper);\n\n if (\n adaptive &&\n ['transform', 'top', 'right', 'bottom', 'left'].some(\n property => transitionProperty.indexOf(property) >= 0\n )\n ) {\n console.warn(\n [\n 'Popper: Detected CSS transitions on at least one of the following',\n 'CSS properties: \"transform\", \"top\", \"right\", \"bottom\", \"left\".',\n '\\n\\n',\n 'Disable the \"computeStyles\" modifier\\'s `adaptive` option to allow',\n 'for smooth transitions, or remove these properties from the CSS',\n 'transition declaration on the popper element if only transitioning',\n 'opacity or background-color for example.',\n '\\n\\n',\n 'We recommend using the popper element as a wrapper around an inner',\n 'element that can have any CSS property transitioned for animations.',\n ].join(' ')\n );\n }\n }\n\n const commonStyles = {\n placement: getBasePlacement(state.placement),\n popper: state.elements.popper,\n popperRect: state.rects.popper,\n gpuAcceleration,\n };\n\n // popper offsets are always available\n state.styles.popper = {\n ...state.styles.popper,\n ...mapToStyles({\n ...commonStyles,\n offsets: state.modifiersData.popperOffsets,\n position: state.options.strategy,\n adaptive,\n }),\n };\n\n // arrow offsets may not be available\n if (state.modifiersData.arrow != null) {\n state.styles.arrow = {\n ...state.styles.arrow,\n ...mapToStyles({\n ...commonStyles,\n offsets: state.modifiersData.arrow,\n position: 'absolute',\n adaptive: false,\n }),\n };\n }\n\n state.attributes.popper = {\n ...state.attributes.popper,\n 'data-popper-placement': state.placement,\n };\n}\n\nexport default ({\n name: 'computeStyles',\n enabled: true,\n phase: 'beforeWrite',\n fn: computeStyles,\n data: {},\n}: Modifier<Options>);\n","// @flow\nimport type { Placement } from '../enums';\n\nconst hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };\n\nexport default function getOppositePlacement(placement: Placement): Placement {\n return (placement.replace(\n /left|right|bottom|top/g,\n matched => hash[matched]\n ): any);\n}\n","// @flow\nimport type { Placement } from '../enums';\n\nconst hash = { start: 'end', end: 'start' };\n\nexport default function getOppositeVariationPlacement(\n placement: Placement\n): Placement {\n return (placement.replace(/start|end/g, matched => hash[matched]): any);\n}\n","// @flow\nexport default function contains(parent: Element, child: Element) {\n // $FlowFixMe: hasOwnProperty doesn't seem to work in tests\n const isShadow = Boolean(child.getRootNode && child.getRootNode().host);\n\n // First, attempt with faster native method\n if (parent.contains(child)) {\n return true;\n }\n // then fallback to custom implementation with Shadow DOM support\n else if (isShadow) {\n let next = child;\n do {\n if (next && parent.isSameNode(next)) {\n return true;\n }\n // $FlowFixMe: need a better way to handle this...\n next = next.parentNode || next.host;\n } while (next);\n }\n\n // Give up, the result is false\n return false;\n}\n","// @flow\nimport type { Rect, ClientRectObject } from '../types';\n\nexport default function rectToClientRect(rect: Rect): ClientRectObject {\n return {\n ...rect,\n left: rect.x,\n top: rect.y,\n right: rect.x + rect.width,\n bottom: rect.y + rect.height,\n };\n}\n","// @flow\nimport type { ClientRectObject } from '../types';\nimport type { Boundary, RootBoundary } from '../enums';\nimport { viewport } from '../enums';\nimport getViewportRect from './getViewportRect';\nimport getDocumentRect from './getDocumentRect';\nimport listScrollParents from './listScrollParents';\nimport getOffsetParent from './getOffsetParent';\nimport getDocumentElement from './getDocumentElement';\nimport getComputedStyle from './getComputedStyle';\nimport { isElement, isHTMLElement } from './instanceOf';\nimport getBoundingClientRect from './getBoundingClientRect';\nimport getDecorations from './getDecorations';\nimport contains from './contains';\nimport rectToClientRect from '../utils/rectToClientRect';\n\nfunction getClientRectFromMixedType(\n element: Element,\n clippingParent: Element | RootBoundary\n): ClientRectObject {\n return clippingParent === viewport\n ? rectToClientRect(getViewportRect(element))\n : isHTMLElement(clippingParent)\n ? getBoundingClientRect(clippingParent)\n : rectToClientRect(getDocumentRect(getDocumentElement(element)));\n}\n\n// A \"clipping parent\" is an overflowable container with the characteristic of\n// clipping (or hiding) overflowing elements with a position different from\n// `initial`\nfunction getClippingParents(element: Element): Array<Element> {\n const clippingParents = listScrollParents(element);\n const canEscapeClipping =\n ['absolute', 'fixed'].indexOf(getComputedStyle(element).position) >= 0;\n const clipperElement =\n canEscapeClipping && isHTMLElement(element)\n ? getOffsetParent(element)\n : element;\n\n if (!isElement(clipperElement)) {\n return [];\n }\n\n // $FlowFixMe: https://github.com/facebook/flow/issues/1414\n return clippingParents.filter(\n clippingParent =>\n isElement(clippingParent) && contains(clippingParent, clipperElement)\n );\n}\n\n// Gets the maximum area that the element is visible in due to any number of\n// clipping parents\nexport default function getClippingRect(\n element: Element,\n boundary: Boundary,\n rootBoundary: RootBoundary\n): ClientRectObject {\n const mainClippingParents =\n boundary === 'clippingParents'\n ? getClippingParents(element)\n : [].concat(boundary);\n const clippingParents = [...mainClippingParents, rootBoundary];\n const firstClippingParent = clippingParents[0];\n\n const clippingRect = clippingParents.reduce((accRect, clippingParent) => {\n const rect = getClientRectFromMixedType(element, clippingParent);\n const decorations = getDecorations(\n isHTMLElement(clippingParent)\n ? clippingParent\n : getDocumentElement(element)\n );\n\n accRect.top = Math.max(rect.top + decorations.top, accRect.top);\n accRect.right = Math.min(rect.right - decorations.right, accRect.right);\n accRect.bottom = Math.min(rect.bottom - decorations.bottom, accRect.bottom);\n accRect.left = Math.max(rect.left + decorations.left, accRect.left);\n\n return accRect;\n }, getClientRectFromMixedType(element, firstClippingParent));\n\n clippingRect.width = clippingRect.right - clippingRect.left;\n clippingRect.height = clippingRect.bottom - clippingRect.top;\n clippingRect.x = clippingRect.left;\n clippingRect.y = clippingRect.top;\n\n return clippingRect;\n}\n","// @flow\nimport getWindow from './getWindow';\n\nexport default function getViewportRect(element: Element) {\n const win = getWindow(element);\n\n return {\n width: win.innerWidth,\n height: win.innerHeight,\n x: 0,\n y: 0,\n };\n}\n","// @flow\nimport type { Rect } from '../types';\nimport getCompositeRect from './getCompositeRect';\nimport getWindow from './getWindow';\nimport getDocumentElement from './getDocumentElement';\nimport getWindowScroll from './getWindowScroll';\n\nexport default function getDocumentRect(element: HTMLElement): Rect {\n const win = getWindow(element);\n const winScroll = getWindowScroll(element);\n const documentRect = getCompositeRect(getDocumentElement(element), win);\n\n documentRect.height = Math.max(documentRect.height, win.innerHeight);\n documentRect.width = Math.max(documentRect.width, win.innerWidth);\n documentRect.x = -winScroll.scrollLeft;\n documentRect.y = -winScroll.scrollTop;\n\n return documentRect;\n}\n","// @flow\nimport type { SideObject } from '../types';\nimport getBorders from './getBorders';\nimport getNodeName from './getNodeName';\nimport getWindow from './getWindow';\nimport getWindowScrollBarX from './getWindowScrollBarX';\n\n// Borders + scrollbars\nexport default function getDecorations(element: HTMLElement): SideObject {\n const win = getWindow(element);\n const borders = getBorders(element);\n const isHTML = getNodeName(element) === 'html';\n const winScrollBarX = getWindowScrollBarX(element);\n\n const x = element.clientWidth + borders.right;\n let y = element.clientHeight + borders.bottom;\n\n // HACK:\n // document.documentElement.clientHeight on iOS reports the height of the\n // viewport including the bottom bar, even if the bottom bar isn't visible.\n // If the difference between window innerHeight and html clientHeight is more\n // than 50, we assume it's a mobile bottom bar and ignore scrollbars.\n // * A 50px thick scrollbar is likely non-existent (macOS is 15px and Windows\n // is about 17px)\n // * The mobile bar is 114px tall\n if (isHTML && win.innerHeight - element.clientHeight > 50) {\n y = win.innerHeight - borders.bottom;\n }\n\n return {\n top: isHTML ? 0 : element.clientTop,\n right:\n // RTL scrollbar (scrolling containers only)\n element.clientLeft > borders.left\n ? borders.right\n : // LTR scrollbar\n isHTML\n ? win.innerWidth - x - winScrollBarX\n : element.offsetWidth - x,\n bottom: isHTML ? win.innerHeight - y : element.offsetHeight - y,\n left: isHTML ? winScrollBarX : element.clientLeft,\n };\n}\n","// @flow\nimport type { SideObject } from '../types';\nimport getComputedStyle from './getComputedStyle';\nimport { isHTMLElement } from './instanceOf';\n\nfunction toNumber(cssValue: string): number {\n return parseFloat(cssValue) || 0;\n}\n\nexport default function getBorders(element: Element): SideObject {\n const computedStyle = isHTMLElement(element) ? getComputedStyle(element) : {};\n\n return {\n top: toNumber(computedStyle.borderTopWidth),\n right: toNumber(computedStyle.borderRightWidth),\n bottom: toNumber(computedStyle.borderBottomWidth),\n left: toNumber(computedStyle.borderLeftWidth),\n };\n}\n","// @flow\nimport type { SideObject } from '../types';\nimport getFreshSideObject from './getFreshSideObject';\n\nexport default function mergePaddingObject(\n paddingObject: $Shape<SideObject>\n): SideObject {\n return {\n ...getFreshSideObject(),\n ...paddingObject,\n };\n}\n","// @flow\nimport type { SideObject } from '../types';\n\nexport default function getFreshSideObject(): SideObject {\n return {\n top: 0,\n right: 0,\n bottom: 0,\n left: 0,\n };\n}\n","// @flow\n\nexport default function expandToHashMap<\n T: number | string | boolean,\n K: string\n>(value: T, keys: Array<K>): { [key: string]: T } {\n return keys.reduce((hashMap, key) => {\n hashMap[key] = value;\n return hashMap;\n }, {});\n}\n","// @flow\nimport type { State, SideObject, Padding } from '../types';\nimport type { Placement, Boundary, RootBoundary, Context } from '../enums';\nimport getBoundingClientRect from '../dom-utils/getBoundingClientRect';\nimport getClippingRect from '../dom-utils/getClippingRect';\nimport getDocumentElement from '../dom-utils/getDocumentElement';\nimport computeOffsets from './computeOffsets';\nimport rectToClientRect from './rectToClientRect';\nimport {\n clippingParents,\n reference,\n popper,\n bottom,\n top,\n right,\n basePlacements,\n viewport,\n} from '../enums';\nimport { isElement } from '../dom-utils/instanceOf';\nimport mergePaddingObject from './mergePaddingObject';\nimport expandToHashMap from './expandToHashMap';\n\ntype Options = {\n placement: Placement,\n boundary: Boundary,\n rootBoundary: RootBoundary,\n elementContext: Context,\n altBoundary: boolean,\n padding: Padding,\n};\n\nexport default function detectOverflow(\n state: State,\n options: $Shape<Options> = {}\n): SideObject {\n const {\n placement = state.placement,\n boundary = clippingParents,\n rootBoundary = viewport,\n elementContext = popper,\n altBoundary = false,\n padding = 0,\n } = options;\n\n const paddingObject = mergePaddingObject(\n typeof padding !== 'number'\n ? padding\n : expandToHashMap(padding, basePlacements)\n );\n\n const altContext = elementContext === popper ? reference : popper;\n\n const referenceElement = state.elements.reference;\n const popperRect = state.rects.popper;\n const element = state.elements[altBoundary ? altContext : elementContext];\n\n const clippingClientRect = getClippingRect(\n isElement(element) ? element : getDocumentElement(state.elements.popper),\n boundary,\n rootBoundary\n );\n const referenceClientRect = getBoundingClientRect(referenceElement);\n\n const popperOffsets = computeOffsets({\n reference: referenceClientRect,\n element: popperRect,\n strategy: 'absolute',\n placement,\n });\n\n const popperClientRect = rectToClientRect({\n ...popperRect,\n ...popperOffsets,\n });\n\n const elementClientRect =\n elementContext === popper ? popperClientRect : referenceClientRect;\n\n // positive = overflowing the clipping rect\n // 0 or negative = within the clipping rect\n const overflowOffsets = {\n top: clippingClientRect.top - elementClientRect.top + paddingObject.top,\n bottom:\n elementClientRect.bottom -\n clippingClientRect.bottom +\n paddingObject.bottom,\n left: clippingClientRect.left - elementClientRect.left + paddingObject.left,\n right:\n elementClientRect.right - clippingClientRect.right + paddingObject.right,\n };\n\n const offsetData = state.modifiersData.offset;\n\n // Offsets can be applied only to the popper element\n if (elementContext === popper && offsetData) {\n const offset = offsetData[placement];\n\n Object.keys(overflowOffsets).forEach(key => {\n const multiply = [right, bottom].indexOf(key) >= 0 ? 1 : -1;\n const axis = [top, bottom].indexOf(key) >= 0 ? 'y' : 'x';\n overflowOffsets[key] += offset[axis] * multiply;\n });\n }\n\n return overflowOffsets;\n}\n","// @flow\nimport type {\n ModifierArguments,\n Modifier,\n Rect,\n Options,\n SideObject,\n Offsets,\n} from '../types';\nimport { top, bottom, left, right } from '../enums';\nimport detectOverflow from '../utils/detectOverflow';\n\nfunction getSideOffsets(\n overflow: SideObject,\n rect: Rect,\n preventedOffsets: Offsets = { x: 0, y: 0 }\n): SideObject {\n return {\n top: overflow.top - rect.height - preventedOffsets.y,\n right: overflow.right - rect.width + preventedOffsets.x,\n bottom: overflow.bottom - rect.height + preventedOffsets.y,\n left: overflow.left - rect.width - preventedOffsets.x,\n };\n}\n\nfunction isAnySideFullyClipped(overflow: SideObject): boolean {\n return [top, right, bottom, left].some(side => overflow[side] >= 0);\n}\n\nfunction hide({ state, name }: ModifierArguments<Options>) {\n const referenceRect = state.rects.reference;\n const popperRect = state.rects.popper;\n const preventedOffsets = state.modifiersData.preventOverflow;\n\n const referenceOverflow = detectOverflow(state, {\n elementContext: 'reference',\n });\n const popperAltOverflow = detectOverflow(state, {\n altBoundary: true,\n });\n\n const referenceClippingOffsets = getSideOffsets(\n referenceOverflow,\n referenceRect\n );\n const popperEscapeOffsets = getSideOffsets(\n popperAltOverflow,\n popperRect,\n preventedOffsets\n );\n\n const isReferenceHidden = isAnySideFullyClipped(referenceClippingOffsets);\n const hasPopperEscaped = isAnySideFullyClipped(popperEscapeOffsets);\n\n state.modifiersData[name] = {\n referenceClippingOffsets,\n popperEscapeOffsets,\n isReferenceHidden,\n hasPopperEscaped,\n };\n\n state.attributes.popper = {\n ...state.attributes.popper,\n 'data-popper-reference-hidden': isReferenceHidden,\n 'data-popper-escaped': hasPopperEscaped,\n };\n}\n\nexport default ({\n name: 'hide',\n enabled: true,\n phase: 'main',\n requiresIfExists: ['preventOverflow'],\n fn: hide,\n}: Modifier<Options>);\n","// @flow\nimport type { ModifierArguments, Modifier } from '../types';\nimport getWindow from '../dom-utils/getWindow';\n\ntype Options = {\n scroll: boolean,\n resize: boolean,\n};\n\nconst passive = { passive: true };\n\nfunction effect({ state, instance, options }: ModifierArguments<Options>) {\n const { scroll = true, resize = true } = options;\n\n const window = getWindow(state.elements.popper);\n const scrollParents = [\n ...state.scrollParents.reference,\n ...state.scrollParents.popper,\n ];\n\n if (scroll) {\n scrollParents.forEach(scrollParent => {\n scrollParent.addEventListener('scroll', instance.update, passive);\n });\n }\n\n if (resize) {\n window.addEventListener('resize', instance.update, passive);\n }\n\n return () => {\n if (scroll) {\n scrollParents.forEach(scrollParent => {\n scrollParent.removeEventListener('scroll', instance.update, passive);\n });\n }\n\n if (resize) {\n window.removeEventListener('resize', instance.update, passive);\n }\n };\n}\n\nexport default ({\n name: 'eventListeners',\n enabled: true,\n phase: 'write',\n fn: () => {},\n effect,\n data: {},\n}: Modifier<Options>);\n","// @flow\nimport { popperGenerator } from './index';\nimport eventListeners from './modifiers/eventListeners';\nimport popperOffsets from './modifiers/popperOffsets';\nimport computeStyles from './modifiers/computeStyles';\nimport applyStyles from './modifiers/applyStyles';\nimport offset from './modifiers/offset';\nimport flip from './modifiers/flip';\nimport preventOverflow from './modifiers/preventOverflow';\nimport arrow from './modifiers/arrow';\nimport hide from './modifiers/hide';\n\nconst defaultModifiers = [\n eventListeners,\n popperOffsets,\n computeStyles,\n applyStyles,\n offset,\n flip,\n preventOverflow,\n arrow,\n hide,\n];\n\nconst createPopper = popperGenerator({ defaultModifiers });\n\n// eslint-disable-next-line import/no-unused-modules\nexport { createPopper, popperGenerator, defaultModifiers };\n","// @flow\nimport type { ModifierArguments, Modifier } from '../types';\nimport computeOffsets from '../utils/computeOffsets';\n\nfunction popperOffsets({ state, name }: ModifierArguments<{||}>) {\n // Offsets are the actual position the popper needs to have to be\n // properly positioned near its reference element\n // This is the most basic placement, and will be adjusted by\n // the modifiers in the next step\n state.modifiersData[name] = computeOffsets({\n reference: state.rects.reference,\n element: state.rects.popper,\n strategy: 'absolute',\n placement: state.placement,\n });\n}\n\nexport default ({\n name: 'popperOffsets',\n enabled: true,\n phase: 'read',\n fn: popperOffsets,\n data: {},\n}: Modifier<{||}>);\n","// @flow\nimport type { Modifier, ModifierArguments } from '../types';\nimport getNodeName from '../dom-utils/getNodeName';\nimport { isHTMLElement } from '../dom-utils/instanceOf';\n\n// This modifier takes the styles prepared by the `computeStyles` modifier\n// and applies them to the HTMLElements such as popper and arrow\n\nfunction applyStyles({ state }: ModifierArguments<{||}>) {\n Object.keys(state.elements).forEach(name => {\n const style = state.styles[name] || {};\n\n const attributes = state.attributes[name] || {};\n const element = state.elements[name];\n\n // arrow is optional + virtual elements\n if (!isHTMLElement(element) || !getNodeName(element)) {\n return;\n }\n\n // Flow doesn't support to extend this property, but it's the most\n // effective way to apply styles to an HTMLElement\n // $FlowFixMe\n Object.assign(element.style, style);\n\n Object.keys(attributes).forEach(name => {\n const value = attributes[name];\n if (value === false) {\n element.removeAttribute(name);\n } else {\n element.setAttribute(name, value === true ? '' : value);\n }\n });\n });\n}\n\nfunction effect({ state }: ModifierArguments<{||}>) {\n const initialStyles = {\n popper: {\n position: 'absolute',\n left: '0',\n top: '0',\n margin: '0',\n },\n arrow: {\n position: 'absolute',\n },\n reference: {},\n };\n\n Object.assign(state.elements.popper.style, initialStyles.popper);\n\n if (state.elements.arrow) {\n Object.assign(state.elements.arrow.style, initialStyles.arrow);\n }\n\n return () => {\n Object.keys(state.elements).forEach(name => {\n const element = state.elements[name];\n const attributes = state.attributes[name] || {};\n\n const styleProperties = Object.keys(\n state.styles.hasOwnProperty(name)\n ? state.styles[name]\n : initialStyles[name]\n );\n\n // Set all values to an empty string to unset them\n const style = styleProperties.reduce((style, property) => {\n style[property] = '';\n return style;\n }, {});\n\n // arrow is optional + virtual elements\n if (!isHTMLElement(element) || !getNodeName(element)) {\n return;\n }\n\n // Flow doesn't support to extend this property, but it's the most\n // effective way to apply styles to an HTMLElement\n // $FlowFixMe\n Object.assign(element.style, style);\n\n Object.keys(attributes).forEach(attribute => {\n element.removeAttribute(attribute);\n });\n });\n };\n}\n\nexport default ({\n name: 'applyStyles',\n enabled: true,\n phase: 'write',\n fn: applyStyles,\n effect,\n requires: ['computeStyles'],\n}: Modifier<{||}>);\n","// @flow\nimport type { Placement } from '../enums';\nimport type { ModifierArguments, Modifier, Rect, Offsets } from '../types';\nimport getBasePlacement from '../utils/getBasePlacement';\nimport { top, left, right, placements } from '../enums';\n\ntype OffsetsFunction = ({\n popper: Rect,\n reference: Rect,\n placement: Placement,\n}) => [?number, ?number];\n\ntype Offset = OffsetsFunction | [?number, ?number];\n\ntype Options = {\n offset: Offset,\n};\n\nexport function distanceAndSkiddingToXY(\n placement: Placement,\n rects: { popper: Rect, reference: Rect },\n offset: Offset\n): Offsets {\n const basePlacement = getBasePlacement(placement);\n const invertDistance = [left, top].indexOf(basePlacement) >= 0 ? -1 : 1;\n\n let [skidding, distance] =\n typeof offset === 'function'\n ? offset({\n ...rects,\n placement,\n })\n : offset;\n\n skidding = skidding || 0;\n distance = (distance || 0) * invertDistance;\n\n return [left, right].indexOf(basePlacement) >= 0\n ? { x: distance, y: skidding }\n : { x: skidding, y: distance };\n}\n\nfunction offset({ state, options, name }: ModifierArguments<Options>) {\n const { offset = [0, 0] } = options;\n\n const data = placements.reduce((acc, placement) => {\n acc[placement] = distanceAndSkiddingToXY(placement, state.rects, offset);\n return acc;\n }, {});\n\n const { x, y } = data[state.placement];\n\n state.modifiersData.popperOffsets.x += x;\n state.modifiersData.popperOffsets.y += y;\n\n state.modifiersData[name] = data;\n}\n\nexport default ({\n name: 'offset',\n enabled: true,\n phase: 'main',\n requires: ['popperOffsets'],\n fn: offset,\n}: Modifier<Options>);\n","// @flow\nimport type { Placement, Boundary, RootBoundary } from '../enums';\nimport type { ModifierArguments, Modifier, Padding } from '../types';\nimport getOppositePlacement from '../utils/getOppositePlacement';\nimport getBasePlacement from '../utils/getBasePlacement';\nimport getOppositeVariationPlacement from '../utils/getOppositeVariationPlacement';\nimport detectOverflow from '../utils/detectOverflow';\nimport computeAutoPlacement from '../utils/computeAutoPlacement';\nimport { bottom, top, start, right, left, auto } from '../enums';\nimport getVariation from '../utils/getVariation';\n\ntype Options = {\n fallbackPlacements: Array<Placement>,\n padding: Padding,\n boundary: Boundary,\n rootBoundary: RootBoundary,\n flipVariations: boolean,\n};\n\nfunction getExpandedFallbackPlacements(placement: Placement): Array<Placement> {\n if (getBasePlacement(placement) === auto) {\n return [];\n }\n\n const oppositePlacement = getOppositePlacement(placement);\n\n return [\n getOppositeVariationPlacement(placement),\n oppositePlacement,\n getOppositeVariationPlacement(oppositePlacement),\n ];\n}\n\nfunction flip({ state, options, name }: ModifierArguments<Options>) {\n if (state.modifiersData[name]._skip) {\n return;\n }\n\n const {\n fallbackPlacements: specifiedFallbackPlacements,\n padding,\n boundary,\n rootBoundary,\n flipVariations = true,\n } = options;\n\n const preferredPlacement = state.options.placement;\n const basePlacement = getBasePlacement(preferredPlacement);\n const isBasePlacement = basePlacement === preferredPlacement;\n\n const fallbackPlacements =\n specifiedFallbackPlacements ||\n (isBasePlacement || !flipVariations\n ? [getOppositePlacement(preferredPlacement)]\n : getExpandedFallbackPlacements(preferredPlacement));\n\n const placements = [preferredPlacement, ...fallbackPlacements].reduce(\n (acc, placement) => {\n return acc.concat(\n getBasePlacement(placement) === auto\n ? computeAutoPlacement(state, {\n placement,\n boundary,\n rootBoundary,\n padding,\n flipVariations,\n })\n : placement\n );\n },\n []\n );\n\n const referenceRect = state.rects.reference;\n const popperRect = state.rects.popper;\n\n const checksMap = new Map();\n let makeFallbackChecks = true;\n let firstFittingPlacement = placements[0];\n\n for (let i = 0; i < placements.length; i++) {\n const placement = placements[i];\n const basePlacement = getBasePlacement(placement);\n const isStartVariation = getVariation(placement) === start;\n const isVertical = [top, bottom].indexOf(basePlacement) >= 0;\n const len = isVertical ? 'width' : 'height';\n\n const overflow = detectOverflow(state, {\n placement,\n boundary,\n rootBoundary,\n padding,\n });\n\n let mainVariationSide: any = isVertical\n ? isStartVariation\n ? right\n : left\n : isStartVariation\n ? bottom\n : top;\n\n if (referenceRect[len] > popperRect[len]) {\n mainVariationSide = getOppositePlacement(mainVariationSide);\n }\n\n const altVariationSide: any = getOppositePlacement(mainVariationSide);\n\n const checks = [\n overflow[basePlacement] <= 0,\n overflow[mainVariationSide] <= 0,\n overflow[altVariationSide] <= 0,\n ];\n\n if (checks.every(check => check)) {\n firstFittingPlacement = placement;\n makeFallbackChecks = false;\n break;\n }\n\n checksMap.set(placement, checks);\n }\n\n if (makeFallbackChecks) {\n // `2` may be desired in some cases – research later\n const numberOfChecks = flipVariations ? 3 : 1;\n\n for (let i = numberOfChecks; i > 0; i--) {\n const fittingPlacement = placements.find(placement => {\n const checks = checksMap.get(placement);\n if (checks) {\n return checks.slice(0, i).every(check => check);\n }\n });\n\n if (fittingPlacement) {\n firstFittingPlacement = fittingPlacement;\n break;\n }\n }\n }\n\n if (state.placement !== firstFittingPlacement) {\n state.modifiersData[name]._skip = true;\n state.placement = firstFittingPlacement;\n state.reset = true;\n }\n}\n\nexport default ({\n name: 'flip',\n enabled: true,\n phase: 'main',\n fn: flip,\n requiresIfExists: ['offset'],\n data: { _skip: false },\n}: Modifier<Options>);\n","// @flow\nimport type { State, Padding } from '../types';\nimport type {\n Placement,\n BasePlacement,\n VariationPlacement,\n Boundary,\n RootBoundary,\n ComputedPlacement,\n} from '../enums';\nimport getVariation from './getVariation';\nimport { variationPlacements, basePlacements } from '../enums';\nimport detectOverflow from './detectOverflow';\nimport getBasePlacement from './getBasePlacement';\n\ntype Options = {\n placement: Placement,\n padding: Padding,\n boundary: Boundary,\n rootBoundary: RootBoundary,\n flipVariations: boolean,\n};\n\ntype OverflowsMap = {\n [BasePlacement | VariationPlacement]: number,\n};\n\nexport default function computeAutoPlacement(\n state: $Shape<State>,\n options: Options = {}\n): Array<ComputedPlacement> {\n const {\n placement,\n boundary,\n rootBoundary,\n padding,\n flipVariations,\n } = options;\n\n const variation = getVariation(placement);\n\n const placements = variation\n ? flipVariations\n ? variationPlacements\n : variationPlacements.filter(\n placement => getVariation(placement) === variation\n )\n : basePlacements;\n\n // $FlowFixMe: Flow seems to have problems with two array unions...\n const overflows: OverflowsMap = placements.reduce((acc, placement) => {\n acc[placement] = detectOverflow(state, {\n placement,\n boundary,\n rootBoundary,\n padding,\n })[getBasePlacement(placement)];\n\n return acc;\n }, {});\n\n return Object.keys(overflows).sort((a, b) => overflows[a] - overflows[b]);\n}\n","// @flow\nimport { top, left, right, bottom, start } from '../enums';\nimport type { Placement, Boundary, RootBoundary } from '../enums';\nimport type { Rect, ModifierArguments, Modifier, Padding } from '../types';\nimport getBasePlacement from '../utils/getBasePlacement';\nimport getMainAxisFromPlacement from '../utils/getMainAxisFromPlacement';\nimport getAltAxis from '../utils/getAltAxis';\nimport within from '../utils/within';\nimport getLayoutRect from '../dom-utils/getLayoutRect';\nimport detectOverflow from '../utils/detectOverflow';\nimport getVariation from '../utils/getVariation';\nimport getFreshSideObject from '../utils/getFreshSideObject';\n\ntype TetherOffset =\n | (({\n popper: Rect,\n reference: Rect,\n placement: Placement,\n }) => number)\n | number;\n\ntype Options = {\n /* Prevents boundaries overflow on the main axis */\n mainAxis: boolean,\n /* Prevents boundaries overflow on the alternate axis */\n altAxis: boolean,\n /* The area to check the popper is overflowing in */\n boundary: Boundary,\n /* If the popper is not overflowing the main area, fallback to this one */\n rootBoundary: RootBoundary,\n /**\n * Allows the popper to overflow from its boundaries to keep it near its\n * reference element\n */\n tether: boolean,\n /* Offsets when the `tether` option should activate */\n tetherOffset: TetherOffset,\n /* Sets a padding to the provided boundary */\n padding: Padding,\n};\n\nfunction preventOverflow({ state, options, name }: ModifierArguments<Options>) {\n const {\n mainAxis: checkMainAxis = true,\n altAxis: checkAltAxis = false,\n boundary,\n rootBoundary,\n padding,\n tether = true,\n tetherOffset = 0,\n } = options;\n\n const overflow = detectOverflow(state, { boundary, rootBoundary, padding });\n const basePlacement = getBasePlacement(state.placement);\n const variation = getVariation(state.placement);\n const isBasePlacement = !variation;\n const mainAxis = getMainAxisFromPlacement(basePlacement);\n const altAxis = getAltAxis(mainAxis);\n const popperOffsets = state.modifiersData.popperOffsets;\n const referenceRect = state.rects.reference;\n const popperRect = state.rects.popper;\n const tetherOffsetValue =\n typeof tetherOffset === 'function'\n ? tetherOffset({\n ...state.rects,\n placement: state.placement,\n })\n : tetherOffset;\n\n const data = { x: 0, y: 0 };\n\n if (checkMainAxis) {\n const mainSide = mainAxis === 'y' ? top : left;\n const altSide = mainAxis === 'y' ? bottom : right;\n const len = mainAxis === 'y' ? 'height' : 'width';\n const offset = popperOffsets[mainAxis];\n\n const min = popperOffsets[mainAxis] + overflow[mainSide];\n const max = popperOffsets[mainAxis] - overflow[altSide];\n\n const additive = tether ? -popperRect[len] / 2 : 0;\n\n const minLen = variation === start ? referenceRect[len] : popperRect[len];\n const maxLen = variation === start ? -popperRect[len] : -referenceRect[len];\n\n // We need to include the arrow in the calculation so the arrow doesn't go\n // outside the reference bounds\n const arrowElement = state.elements.arrow;\n const arrowRect =\n tether && arrowElement\n ? getLayoutRect(arrowElement)\n : { width: 0, height: 0 };\n const arrowPaddingObject = state.modifiersData['arrow#persistent']\n ? state.modifiersData['arrow#persistent'].padding\n : getFreshSideObject();\n const arrowPaddingMin = arrowPaddingObject[mainSide];\n const arrowPaddingMax = arrowPaddingObject[altSide];\n\n // If the reference length is smaller than the arrow length, we don't want\n // to include its full size in the calculation. If the reference is small\n // and near the edge of a boundary, the popper can overflow even if the\n // reference is not overflowing as well (e.g. virtual elements with no\n // width or height)\n const arrowLen = within(0, referenceRect[len], arrowRect[len]);\n\n const minOffset = isBasePlacement\n ? referenceRect[len] / 2 -\n additive -\n arrowLen -\n arrowPaddingMin -\n tetherOffsetValue\n : minLen - arrowLen - arrowPaddingMin - tetherOffsetValue;\n const maxOffset = isBasePlacement\n ? -referenceRect[len] / 2 +\n additive +\n arrowLen +\n arrowPaddingMax +\n tetherOffsetValue\n : maxLen + arrowLen + arrowPaddingMax + tetherOffsetValue;\n\n const offsetModifierValue = state.modifiersData.offset\n ? state.modifiersData.offset[state.placement][mainAxis]\n : 0;\n const tetherMin = popperOffsets[mainAxis] + minOffset - offsetModifierValue;\n const tetherMax = popperOffsets[mainAxis] + maxOffset - offsetModifierValue;\n\n const preventedOffset = within(\n tether ? Math.min(min, tetherMin) : min,\n offset,\n tether ? Math.max(max, tetherMax) : max\n );\n\n popperOffsets[mainAxis] = preventedOffset;\n data[mainAxis] = preventedOffset - offset;\n }\n\n if (checkAltAxis) {\n const mainSide = mainAxis === 'x' ? top : left;\n const altSide = mainAxis === 'x' ? bottom : right;\n const offset = popperOffsets[altAxis];\n\n const min = offset + overflow[mainSide];\n const max = offset - overflow[altSide];\n\n const preventedOffset = within(min, offset, max);\n\n state.modifiersData.popperOffsets[altAxis] = preventedOffset;\n data[altAxis] = preventedOffset - offset;\n }\n\n state.modifiersData[name] = data;\n}\n\nexport default ({\n name: 'preventOverflow',\n enabled: true,\n phase: 'main',\n fn: preventOverflow,\n requiresIfExists: ['offset'],\n}: Modifier<Options>);\n","// @flow\n\nexport default function getAltAxis(axis: 'x' | 'y'): 'x' | 'y' {\n return axis === 'x' ? 'y' : 'x';\n}\n","// @flow\n\nexport default function within(\n min: number,\n value: number,\n max: number\n): number {\n return Math.max(min, Math.min(value, max));\n}\n","// @flow\nimport type { Modifier, ModifierArguments, Padding } from '../types';\nimport getBasePlacement from '../utils/getBasePlacement';\nimport getLayoutRect from '../dom-utils/getLayoutRect';\nimport contains from '../dom-utils/contains';\nimport getMainAxisFromPlacement from '../utils/getMainAxisFromPlacement';\nimport within from '../utils/within';\nimport mergePaddingObject from '../utils/mergePaddingObject';\nimport expandToHashMap from '../utils/expandToHashMap';\nimport { left, right, basePlacements, top, bottom } from '../enums';\n\ntype Options = {\n element: HTMLElement | string,\n padding: Padding,\n};\n\nfunction arrow({ state, name }: ModifierArguments<Options>) {\n const arrowElement = state.elements.arrow;\n const popperOffsets = state.modifiersData.popperOffsets;\n const basePlacement = getBasePlacement(state.placement);\n const axis = getMainAxisFromPlacement(basePlacement);\n const isVertical = [left, right].indexOf(basePlacement) >= 0;\n const len = isVertical ? 'height' : 'width';\n\n if (!arrowElement) {\n return;\n }\n\n const paddingObject = state.modifiersData[`${name}#persistent`].padding;\n const arrowRect = getLayoutRect(arrowElement);\n const minProp = axis === 'y' ? top : left;\n const maxProp = axis === 'y' ? bottom : right;\n\n const endDiff =\n state.rects.reference[len] +\n state.rects.reference[axis] -\n popperOffsets[axis] -\n state.rects.popper[len];\n const startDiff = popperOffsets[axis] - state.rects.reference[axis];\n\n const centerToReference = endDiff / 2 - startDiff / 2;\n\n // Make sure the arrow doesn't overflow the popper if the center point is\n // outside of the popper bounds\n const center = within(\n paddingObject[minProp],\n state.rects.popper[len] / 2 - arrowRect[len] / 2 + centerToReference,\n state.rects.popper[len] - arrowRect[len] - paddingObject[maxProp]\n );\n\n // Prevents breaking syntax highlighting...\n const axisProp: string = axis;\n state.modifiersData[name] = { [axisProp]: center };\n}\n\nfunction 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\ No newline at end of file
diff --git a/core/core.libraries.yml b/core/core.libraries.yml
index 8ecd5b7dec40..4115f603e1e4 100644
--- a/core/core.libraries.yml
+++ b/core/core.libraries.yml
@@ -95,6 +95,11 @@ drupal.autocomplete:
- core/drupal.ajax
- core/jquery.ui.autocomplete
+drupal.array.find:
+ version: VERSION
+ js:
+ misc/polyfills/array.find.js: { weight: -20 }
+
drupal.batch:
version: VERSION
js:
@@ -227,6 +232,11 @@ drupal.message:
- core/drupal
- core/drupal.announce
+drupal.object.assign:
+ version: VERSION
+ js:
+ misc/polyfills/object.assign.js: { weight: -20 }
+
drupal.progress:
version: VERSION
js:
@@ -321,6 +331,15 @@ drupal.vertical-tabs:
- core/drupalSettings
- core/drupal.form
+es6-promise:
+ version: "4.2.8"
+ license:
+ name: MIT
+ url: https://github.com/stefanpenner/es6-promise/blob/v4.2.8/LICENSE
+ gpl-compatible: true
+ js:
+ assets/vendor/es6-promise/es6-promise.auto.min.js: { weight: -20, minified: true }
+
jquery:
remote: https://github.com/jquery/jquery
version: "3.4.1"
@@ -602,13 +621,17 @@ picturefill:
assets/vendor/picturefill/picturefill.min.js: { weight: -10, minified: true }
popperjs:
- version: "1.16.0"
+ version: "2.0.6"
license:
name: MIT
- url: https://github.com/popperjs/popper.js/blob/v1.16.0/LICENSE.md
+ url: https://github.com/popperjs/popper-core/blob/v2.0.6/LICENSE.md
gpl-compatible: true
js:
assets/vendor/popperjs/popper.min.js: { minified: true }
+ dependencies:
+ - core/drupal.array.find
+ - core/es6-promise
+ - core/drupal.object.assign
sortable:
remote: https://github.com/SortableJS/Sortable
diff --git a/core/misc/polyfills/array.find.es6.js b/core/misc/polyfills/array.find.es6.js
new file mode 100644
index 000000000000..e24f3a3c6898
--- /dev/null
+++ b/core/misc/polyfills/array.find.es6.js
@@ -0,0 +1,60 @@
+/**
+ * @file
+ * Provides a polyfill for Array.find().
+ *
+ * This is needed for Internet Explorer 11 and Opera Mini.
+ *
+ * This has been copied from MDN Web Docs code samples. Code samples in the MDN
+ * Web Docs are licensed under CC0.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find#Polyfill
+ * @see https://developer.mozilla.org/en-US/docs/MDN/About#Code_samples_and_snippets
+ */
+if (!Array.prototype.find) {
+ Object.defineProperty(Array.prototype, 'find', {
+ value: function (predicate) {
+ // 1. Let O be ? ToObject(this value).
+ if (this == null) {
+ throw TypeError('"this" is null or not defined');
+ }
+
+ var o = Object(this);
+
+ // 2. Let len be ? ToLength(? Get(O, "length")).
+ var len = o.length >>> 0;
+
+ // 3. If IsCallable(predicate) is false, throw a TypeError
+ // exception.
+ if (typeof predicate !== 'function') {
+ throw TypeError('predicate must be a function');
+ }
+
+ // 4. If thisArg was supplied, let T be thisArg; else let T be
+ // undefined.
+ var thisArg = arguments[1];
+
+ // 5. Let k be 0.
+ var k = 0;
+
+ // 6. Repeat, while k < len
+ while (k < len) {
+ // a. Let Pk be ! ToString(k).
+ // b. Let kValue be ? Get(O, Pk).
+ // c. Let testResult be ToBoolean(? Call(predicate, T, « kValue,
+ // k, O »)).
+ // d. If testResult is true, return kValue.
+ var kValue = o[k];
+ if (predicate.call(thisArg, kValue, k, o)) {
+ return kValue;
+ }
+ // e. Increase k by 1.
+ k++;
+ }
+
+ // 7. Return undefined.
+ return undefined;
+ },
+ configurable: true,
+ writable: true,
+ });
+}
diff --git a/core/misc/polyfills/array.find.js b/core/misc/polyfills/array.find.js
new file mode 100644
index 000000000000..98341bf4cb76
--- /dev/null
+++ b/core/misc/polyfills/array.find.js
@@ -0,0 +1,40 @@
+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+
+if (!Array.prototype.find) {
+ Object.defineProperty(Array.prototype, 'find', {
+ value: function value(predicate) {
+ if (this == null) {
+ throw TypeError('"this" is null or not defined');
+ }
+
+ var o = Object(this);
+ var len = o.length >>> 0;
+
+ if (typeof predicate !== 'function') {
+ throw TypeError('predicate must be a function');
+ }
+
+ var thisArg = arguments[1];
+ var k = 0;
+
+ while (k < len) {
+ var kValue = o[k];
+
+ if (predicate.call(thisArg, kValue, k, o)) {
+ return kValue;
+ }
+
+ k++;
+ }
+
+ return undefined;
+ },
+ configurable: true,
+ writable: true
+ });
+}
\ No newline at end of file
diff --git a/core/misc/polyfills/object.assign.es6.js b/core/misc/polyfills/object.assign.es6.js
new file mode 100644
index 000000000000..399bdb8c3502
--- /dev/null
+++ b/core/misc/polyfills/object.assign.es6.js
@@ -0,0 +1,41 @@
+/**
+ * @file
+ * Provides a polyfill for Object.assign().
+ *
+ * This is needed for Internet Explorer 11 and Opera Mini.
+ *
+ * This has been copied from MDN Web Docs code samples. Code samples in the MDN
+ * Web Docs are licensed under CC0.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign#Polyfill
+ * @see https://developer.mozilla.org/en-US/docs/MDN/About#Code_samples_and_snippets
+ */
+if (typeof Object.assign !== 'function') {
+ // Must be writable: true, enumerable: false, configurable: true
+ Object.defineProperty(Object, "assign", {
+ value: function assign(target, varArgs) { // .length of function is 2
+ 'use strict';
+ if (target === null || target === undefined) {
+ throw new TypeError('Cannot convert undefined or null to object');
+ }
+
+ var to = Object(target);
+
+ for (var index = 1; index < arguments.length; index++) {
+ var nextSource = arguments[index];
+
+ if (nextSource !== null && nextSource !== undefined) {
+ for (var nextKey in nextSource) {
+ // Avoid bugs when hasOwnProperty is shadowed
+ if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
+ to[nextKey] = nextSource[nextKey];
+ }
+ }
+ }
+ }
+ return to;
+ },
+ writable: true,
+ configurable: true
+ });
+}
diff --git a/core/misc/polyfills/object.assign.js b/core/misc/polyfills/object.assign.js
new file mode 100644
index 000000000000..289c59ad3114
--- /dev/null
+++ b/core/misc/polyfills/object.assign.js
@@ -0,0 +1,36 @@
+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+
+if (typeof Object.assign !== 'function') {
+ Object.defineProperty(Object, "assign", {
+ value: function assign(target, varArgs) {
+ 'use strict';
+
+ if (target === null || target === undefined) {
+ throw new TypeError('Cannot convert undefined or null to object');
+ }
+
+ var to = Object(target);
+
+ for (var index = 1; index < arguments.length; index++) {
+ var nextSource = arguments[index];
+
+ if (nextSource !== null && nextSource !== undefined) {
+ for (var nextKey in nextSource) {
+ if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
+ to[nextKey] = nextSource[nextKey];
+ }
+ }
+ }
+ }
+
+ return to;
+ },
+ writable: true,
+ configurable: true
+ });
+}
\ No newline at end of file
diff --git a/core/modules/image/tests/src/FunctionalJavascript/QuickEditImageTest.php b/core/modules/image/tests/src/FunctionalJavascript/QuickEditImageTest.php
index 2b1dd79dbf66..dda740d104d4 100644
--- a/core/modules/image/tests/src/FunctionalJavascript/QuickEditImageTest.php
+++ b/core/modules/image/tests/src/FunctionalJavascript/QuickEditImageTest.php
@@ -34,6 +34,15 @@ class QuickEditImageTest extends QuickEditJavascriptTestBase {
*/
protected $contentAuthorUser;
+ /**
+ * CSS animations must be enabled for PopperJS positioning to work properly.
+ *
+ * @var bool
+ *
+ * @todo revisit in http://drupal.org/node/3082602
+ */
+ protected $disableCssAnimations = FALSE;
+
/**
* {@inheritdoc}
*/
diff --git a/core/modules/quickedit/js/views/EntityToolbarView.es6.js b/core/modules/quickedit/js/views/EntityToolbarView.es6.js
index eece46b5a11e..204a20f5df7b 100644
--- a/core/modules/quickedit/js/views/EntityToolbarView.es6.js
+++ b/core/modules/quickedit/js/views/EntityToolbarView.es6.js
@@ -296,40 +296,13 @@
* @param {object} data
* Data object containing popper and target data.
*/
- function refinePopper(data) {
+ function refinePopper({ state }) {
// Determine if the pointer should be on the top or bottom.
- const isBelow = data.offsets.popper.top > data.offsets.reference.top;
+ const isBelow = state.placement.split('-')[0] === 'bottom';
const classListMethod = isBelow ? 'add' : 'remove';
- data.instance.popper.classList[classListMethod](
+ state.elements.popper.classList[classListMethod](
'quickedit-toolbar-pointer-top',
);
- // Don't position the toolbar past the first or last editable field if
- // the entity is the target.
- if (that.$entity[0] === data.instance.reference) {
- // Get the first or last field according to whether the toolbar is
- // above or below the entity.
- const $field = that.$entity
- .find('.quickedit-editable')
- .eq(isBelow ? -1 : 0);
- if ($field.length > 0) {
- data.offsets.popper.top = isBelow
- ? $field.offset().top + $field.outerHeight(true)
- : $field.offset().top -
- $(data.instance.reference).outerHeight(true);
- }
- }
- // Don't let the toolbar go outside the fence.
- const fenceTop = that.$fence.offset().top;
- const fenceHeight = that.$fence.height();
- const toolbarHeight = $(data.instance.popper).outerHeight(true);
- if (data.offsets.popper.top < fenceTop) {
- data.offsets.popper.top = fenceTop;
- } else if (
- data.offsets.popper.top + toolbarHeight >
- fenceTop + fenceHeight
- ) {
- data.offsets.popper.top = fenceTop + fenceHeight - toolbarHeight;
- }
}
/**
* Calls the Popper() method on the $el of this view.
@@ -341,29 +314,48 @@
const popperedge = edge === 'left' ? 'start' : 'end';
if (referenceElement !== undefined) {
if (!popperElement.classList.contains('js-popper-processed')) {
- that.popper = new Popper(referenceElement, popperElement, {
- placement: `top-${popperedge}`,
- modifiers: {
- flip: {
- behavior: ['top', 'bottom'],
- },
- computeStyle: {
- gpuAcceleration: false,
- },
- preventOverflow: {
- boundariesElement,
- },
+ that.popper = Popper.createPopper(
+ referenceElement,
+ popperElement,
+ {
+ placement: `top-${popperedge}`,
+ modifiers: [
+ {
+ name: 'flip',
+ options: {
+ boundary: boundariesElement,
+ },
+ },
+ {
+ name: 'preventOverflow',
+ options: {
+ boundary: boundariesElement,
+ tether: false,
+ altAxis: true,
+ padding: { top: 5, bottom: 5 },
+ },
+ },
+ {
+ name: 'computeStyles',
+ options: {
+ adaptive: false,
+ },
+ },
+ {
+ name: 'refinePopper',
+ phase: 'write',
+ enabled: true,
+ fn: refinePopper,
+ },
+ ],
},
- onCreate: refinePopper,
- onUpdate: refinePopper,
- });
+ );
popperElement.classList.add('js-popper-processed');
} else {
- that.popper.options.placement = `top-${popperedge}`;
- that.popper.reference = referenceElement[0]
+ that.popper.state.elements.reference = referenceElement[0]
? referenceElement[0]
: referenceElement;
- that.popper.update();
+ that.popper.forceUpdate();
}
}
diff --git a/core/modules/quickedit/js/views/EntityToolbarView.js b/core/modules/quickedit/js/views/EntityToolbarView.js
index 1400327dfbd1..afaf356490a6 100644
--- a/core/modules/quickedit/js/views/EntityToolbarView.js
+++ b/core/modules/quickedit/js/views/EntityToolbarView.js
@@ -151,28 +151,11 @@
check++;
} while (!of);
- function refinePopper(data) {
- var isBelow = data.offsets.popper.top > data.offsets.reference.top;
+ function refinePopper(_ref) {
+ var state = _ref.state;
+ var isBelow = state.placement.split('-')[0] === 'bottom';
var classListMethod = isBelow ? 'add' : 'remove';
- data.instance.popper.classList[classListMethod]('quickedit-toolbar-pointer-top');
-
- if (that.$entity[0] === data.instance.reference) {
- var $field = that.$entity.find('.quickedit-editable').eq(isBelow ? -1 : 0);
-
- if ($field.length > 0) {
- data.offsets.popper.top = isBelow ? $field.offset().top + $field.outerHeight(true) : $field.offset().top - $(data.instance.reference).outerHeight(true);
- }
- }
-
- var fenceTop = that.$fence.offset().top;
- var fenceHeight = that.$fence.height();
- var toolbarHeight = $(data.instance.popper).outerHeight(true);
-
- if (data.offsets.popper.top < fenceTop) {
- data.offsets.popper.top = fenceTop;
- } else if (data.offsets.popper.top + toolbarHeight > fenceTop + fenceHeight) {
- data.offsets.popper.top = fenceTop + fenceHeight - toolbarHeight;
- }
+ state.elements.popper.classList[classListMethod]('quickedit-toolbar-pointer-top');
}
function positionToolbar() {
@@ -183,27 +166,40 @@
if (referenceElement !== undefined) {
if (!popperElement.classList.contains('js-popper-processed')) {
- that.popper = new Popper(referenceElement, popperElement, {
+ that.popper = Popper.createPopper(referenceElement, popperElement, {
placement: "top-".concat(popperedge),
- modifiers: {
- flip: {
- behavior: ['top', 'bottom']
- },
- computeStyle: {
- gpuAcceleration: false
- },
- preventOverflow: {
- boundariesElement: boundariesElement
+ modifiers: [{
+ name: 'flip',
+ options: {
+ boundary: boundariesElement
+ }
+ }, {
+ name: 'preventOverflow',
+ options: {
+ boundary: boundariesElement,
+ tether: false,
+ altAxis: true,
+ padding: {
+ top: 5,
+ bottom: 5
+ }
+ }
+ }, {
+ name: 'computeStyles',
+ options: {
+ adaptive: false
}
- },
- onCreate: refinePopper,
- onUpdate: refinePopper
+ }, {
+ name: 'refinePopper',
+ phase: 'write',
+ enabled: true,
+ fn: refinePopper
+ }]
});
popperElement.classList.add('js-popper-processed');
} else {
- that.popper.options.placement = "top-".concat(popperedge);
- that.popper.reference = referenceElement[0] ? referenceElement[0] : referenceElement;
- that.popper.update();
+ that.popper.state.elements.reference = referenceElement[0] ? referenceElement[0] : referenceElement;
+ that.popper.forceUpdate();
}
}
diff --git a/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditFileTest.php b/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditFileTest.php
index f21ba6d7ab54..037fa3e27c69 100644
--- a/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditFileTest.php
+++ b/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditFileTest.php
@@ -28,6 +28,15 @@ class QuickEditFileTest extends QuickEditJavascriptTestBase {
*/
protected $defaultTheme = 'stark';
+ /**
+ * CSS animations must be enabled for PopperJS positioning to work properly.
+ *
+ * @var bool
+ *
+ * @todo revisit in http://drupal.org/node/3082602
+ */
+ protected $disableCssAnimations = FALSE;
+
/**
* {@inheritdoc}
*/
diff --git a/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditIntegrationTest.php b/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditIntegrationTest.php
index 24f36d440eca..fc4611e410a9 100644
--- a/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditIntegrationTest.php
+++ b/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditIntegrationTest.php
@@ -43,6 +43,15 @@ class QuickEditIntegrationTest extends QuickEditJavascriptTestBase {
*/
protected $contentAuthorUser;
+ /**
+ * CSS animations must be enabled for PopperJS positioning to work properly.
+ *
+ * @var bool
+ *
+ * @todo revisit in http://drupal.org/node/3082602
+ */
+ protected $disableCssAnimations = FALSE;
+
/**
* {@inheritdoc}
*/
diff --git a/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditLoadingTest.php b/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditLoadingTest.php
index 4f52c00efa41..a28504e3c04b 100644
--- a/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditLoadingTest.php
+++ b/core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditLoadingTest.php
@@ -67,6 +67,15 @@ class QuickEditLoadingTest extends WebDriverTestBase {
*/
protected $editorUser;
+ /**
+ * CSS animations must be enabled for PopperJS positioning to work properly.
+ *
+ * @var bool
+ *
+ * @todo revisit in http://drupal.org/node/3082602
+ */
+ protected $disableCssAnimations = FALSE;
+
/**
* {@inheritdoc}
*/
--
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