Issue #3113649 by bnjmnm, ayushmishra206, ilgnerfagundes, lauriii, nod_, xjm,...

    "Modernizr": true,

    "Popper": true,

    "Sortable": true,

    "CKEDITOR": true

    "CKEDITOR": true,

    "tabbable": true

  },

  "settings": {

    "react": {

/*! https://mths.be/cssescape v1.5.1 by @mathias | MIT license */

;(function(root, factory) {

	// https://github.com/umdjs/umd/blob/master/returnExports.js

	if (typeof exports == 'object') {

		// For Node.js.

		module.exports = factory(root);

	} else if (typeof define == 'function' && define.amd) {

		// For AMD. Register as an anonymous module.

		define([], factory.bind(root, root));

	} else {

		// For browser globals (not exposing the function separately).

		factory(root);

	}

}(typeof global != 'undefined' ? global : this, function(root) {

	if (root.CSS && root.CSS.escape) {

		return root.CSS.escape;

	}

	// https://drafts.csswg.org/cssom/#serialize-an-identifier

	var cssEscape = function(value) {

		if (arguments.length == 0) {

			throw new TypeError('`CSS.escape` requires an argument.');

		}

		var string = String(value);

		var length = string.length;

		var index = -1;

		var codeUnit;

		var result = '';

		var firstCodeUnit = string.charCodeAt(0);

		while (++index < length) {

			codeUnit = string.charCodeAt(index);

			// Note: there’s no need to special-case astral symbols, surrogate

			// pairs, or lone surrogates.

			// If the character is NULL (U+0000), then the REPLACEMENT CHARACTER

			// (U+FFFD).

			if (codeUnit == 0x0000) {

				result += '\uFFFD';

				continue;

			}

			if (

				// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is

				// U+007F, […]

				(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||

				// If the character is the first character and is in the range [0-9]

				// (U+0030 to U+0039), […]

				(index == 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||

				// If the character is the second character and is in the range [0-9]

				// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]

				(

					index == 1 &&

					codeUnit >= 0x0030 && codeUnit <= 0x0039 &&

					firstCodeUnit == 0x002D

				)

			) {

				// https://drafts.csswg.org/cssom/#escape-a-character-as-code-point

				result += '\\' + codeUnit.toString(16) + ' ';

				continue;

			}

			if (

				// If the character is the first character and is a `-` (U+002D), and

				// there is no second character, […]

				index == 0 &&

				length == 1 &&

				codeUnit == 0x002D

			) {

				result += '\\' + string.charAt(index);

				continue;

			}

			// If the character is not handled by one of the above rules and is

			// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or

			// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to

			// U+005A), or [a-z] (U+0061 to U+007A), […]

			if (

				codeUnit >= 0x0080 ||

				codeUnit == 0x002D ||

				codeUnit == 0x005F ||

				codeUnit >= 0x0030 && codeUnit <= 0x0039 ||

				codeUnit >= 0x0041 && codeUnit <= 0x005A ||

				codeUnit >= 0x0061 && codeUnit <= 0x007A

			) {

				// the character itself

				result += string.charAt(index);

				continue;

			}

			// Otherwise, the escaped character.

			// https://drafts.csswg.org/cssom/#escape-a-character

			result += '\\' + string.charAt(index);

		}

		return result;

	};

	if (!root.CSS) {

		root.CSS = {};

	}

	root.CSS.escape = cssEscape;

	return cssEscape;

}));

			"../position",

			"../safe-active-element",

			"../safe-blur",

			"../tabbable",

			"../unique-id",

			"../version",

			"../widget"

Drupal core uses the UMD build of tabbable.

To create this build:

Navigate to the root directory of the tabbable library.

Ensure that dependencies have been installed:

```

yarn install

```

Build files for production:

```

yarn build

```

This will create an index.umd.min.js file in dist/ that can be used in Drupal.