Issue #3367084: Add support for basic object methods with no arguments.

js/webform_javascript_setting.js

@@ -21,7 +21,17 @@
       const setting = element.getAttribute('data-webform-javascript-setting');
       // Convert a JavaScript string in dot notation into an object reference.
       // @see https://stackoverflow.com/questions/6393943/convert-a-javascript-string-in-dot-notation-into-an-object-reference
-      const value = setting.split('.').reduce((o, i) => o[i], window);
+      const value = setting.split('.').reduce(
+        function (object, property) {
+          // If the property is a method (aka function) call it.
+          if (typeof object[property] === 'function') {
+            return object[property]();
+          }
+          else {
+            return object[property];
+          }
+        }, window);
+
       // Set the hidden element's value.
       if (value) {
         element.value = value;

tests/modules/webform_javascript_setting_test/config/install/webform.webform.test_webform_javascript_setting.yml

@@ -12,12 +12,19 @@ title: 'Test: Webform Javascript Setting'
 description: ''
 categories: {  }
 elements: |-
-  webform_javascript_setting:
+  webform_javascript_setting_user_id:
     '#type': webform_javascript_setting
-    '#title': webform_javascript_setting
+    '#title': webform_javascript_setting_user_id
     '#javascript_setting': drupal_user_id
+  webform_javascript_setting_get:
+    '#type': webform_javascript_setting
+    '#title': webform_javascript_setting_get
+    '#javascript_setting': webform_javascript_setting_get
 css: ''
-javascript: ''
+javascript: |-
+  window.WebformJavaScriptSettingTest = {
+    get: () => '{some_value}',
+  };
 settings:
   ajax: false
   ajax_scroll_top: form

tests/modules/webform_javascript_setting_test/webform_javascript_setting_test.install

+<?php
+
+/**
+ * @file
+ * Install function for the Webform JavaScript Setting Element Test module.
+ */
+
+/**
+ * Implements hook_install().
+ */
+function webform_javascript_setting_test_install(bool $is_syncing): void {
+  if ($is_syncing) {
+    return;
+  }
+
+  /** @var \Drupal\webform\WebformThirdPartySettingsManagerInterface $third_party_settings_manager */
+  $third_party_settings_manager = \Drupal::service('webform.third_party_settings_manager');
+  $settings = $third_party_settings_manager
+    ->getThirdPartySetting('webform_javascript_setting', 'settings');
+
+  $settings['webform_javascript_setting_get'] = [
+    'setting' => 'WebformJavaScriptSettingTest.get',
+    'label' => 'WebformJavaScriptSettingTest: get()',
+  ];
+
+  $third_party_settings_manager
+    ->setThirdPartySetting('webform_javascript_setting', 'settings', $settings);
+}

tests/src/FunctionalJavascript/WebformJavaScriptSettingJavaScriptTest.php

@@ -37,8 +37,10 @@ class WebformJavaScriptSettingJavaScriptTest extends WebDriverTestBase {
 
     // Check JavaScript settings field is populated.
     $this->drupalGet('/webform/test_webform_javascript_setting/');
-    $assert_session->hiddenFieldExists('webform_javascript_setting');
-    $assert_session->hiddenFieldValueEquals('webform_javascript_setting', '1');
+    $assert_session->hiddenFieldExists('webform_javascript_setting_user_id');
+    $assert_session->hiddenFieldValueEquals('webform_javascript_setting_user_id', '1');
+    $assert_session->hiddenFieldExists('webform_javascript_setting_get');
+    $assert_session->hiddenFieldValueEquals('webform_javascript_setting_get', '{some_value}');
   }
 
 }

webform_javascript_setting.install

@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Install, update and uninstall functions for the Webform module.
+ * Install function for the Webform JavaScript Setting Element module.
  */
 
 /**