diff --git a/core/modules/editor/js/editor.admin.js b/core/modules/editor/js/editor.admin.js
index 9b591746c20065ecf0920f05bca6c53b0dcf356a..14599d06ce1ec492282d55608e3a4d7117f65801 100644
--- a/core/modules/editor/js/editor.admin.js
+++ b/core/modules/editor/js/editor.admin.js
@@ -12,6 +12,8 @@
   "use strict";
 
   /**
+   * Editor configuration namespace.
+   *
    * @namespace
    */
   Drupal.editorConfiguration = {
@@ -132,8 +134,10 @@
        * "allowed tag property value" restrictions for this particular tag.
        *
        * @param {object} feature
+       *   The feature in question.
        *
        * @return {object}
+       *   The universe generated.
        *
        * @see findPropertyValueOnTag()
        * @see filterStatusAllowsFeature()
@@ -187,8 +191,10 @@
        * values are defined for all properties: attributes, classes and styles.
        *
        * @param {object} section
+       *   The section to check.
        *
        * @return {bool}
+       *   Returns true if the section has empty properties, false otherwise.
        */
       function emptyProperties(section) {
         return section.attributes.length === 0 && section.classes.length === 0 && section.styles.length === 0;
@@ -200,12 +206,18 @@
        * tag.
        *
        * @param {object} universe
+       *   The universe to check.
        * @param {string} tag
+       *   The tag to look for.
        * @param {string} property
+       *   The property to check.
        * @param {Array} propertyValues
+       *   Values of the property to check.
        * @param {bool} allowing
+       *   Whether to update the universe or not.
        *
        * @return {bool}
+       *   Returns true if found, false otherwise.
        */
       function findPropertyValuesOnTag(universe, tag, property, propertyValues, allowing) {
         // Detect the wildcard case.
@@ -226,11 +238,16 @@
        * Calls findPropertyValuesOnAllTags for all tags in the universe.
        *
        * @param {object} universe
+       *   The universe to check.
        * @param {string} property
+       *   The property to check.
        * @param {Array} propertyValues
+       *   Values of the property to check.
        * @param {bool} allowing
+       *   Whether to update the universe or not.
        *
        * @return {bool}
+       *   Returns true if found, false otherwise.
        */
       function findPropertyValuesOnAllTags(universe, property, propertyValues, allowing) {
         var atLeastOneFound = false;
@@ -249,12 +266,18 @@
        * value exists. Returns true if found, false otherwise.
        *
        * @param {object} universe
+       *   The universe to check.
        * @param {string} tag
+       *   The tag to look for.
        * @param {string} property
+       *   The property to check.
        * @param {string} propertyValue
+       *   The property value to check.
        * @param {bool} allowing
+       *   Whether to update the universe or not.
        *
        * @return {bool}
+       *   Returns true if found, false otherwise.
        */
       function findPropertyValueOnTag(universe, tag, property, propertyValue, allowing) {
         // If the tag does not exist in the universe, then it definitely can't
@@ -303,9 +326,12 @@
        * properties are marked as allowed.
        *
        * @param {object} universe
+       *   The universe to delete from.
        * @param {string} tag
+       *   The tag to check.
        *
        * @return {bool}
+       *   Whether something was deleted from the universe.
        */
       function deleteFromUniverseIfAllowed(universe, tag) {
         // Detect the wildcard case.
@@ -323,8 +349,10 @@
        * Calls deleteFromUniverseIfAllowed for all tags in the universe.
        *
        * @param {object} universe
+       *   The universe to delete from.
        *
        * @return {bool}
+       *   Whether something was deleted from the universe.
        */
       function deleteAllTagsFromUniverseIfAllowed(universe) {
         var atLeastOneDeleted = false;
@@ -341,9 +369,12 @@
        * that exists in the universe.
        *
        * @param {object} universe
+       *   Universe to check.
        * @param {object} filterStatus
+       *   Filter status to use for check.
        *
        * @return {bool}
+       *   Whether any filter rule forbids something in the universe.
        */
       function anyForbiddenFilterRuleMatches(universe, filterStatus) {
         var properties = ['attributes', 'styles', 'classes'];
@@ -392,7 +423,9 @@
        * deleted from the universe.
        *
        * @param {object} universe
+       *   Universe to delete from.
        * @param {object} filterStatus
+       *   The filter status in question.
        */
       function markAllowedTagsAndPropertyValues(universe, filterStatus) {
         var properties = ['attributes', 'styles', 'classes'];
@@ -445,9 +478,12 @@
        * that.
        *
        * @param {object} filterStatus
+       *   The filter status in question.
        * @param {object} feature
+       *   The feature requested.
        *
        * @return {bool}
+       *   Whether the current status of the filter allows specified feature.
        *
        * @see generateUniverseFromFeatureRequirements()
        */
@@ -768,7 +804,10 @@
    *   }
    * }
    *
-   * @return {{
+   * @return {object}
+   *   An object with the following structure:
+   * ```
+   * {
    *   tags: Array,
    *   allow: null,
    *   restrictedTags: {
@@ -776,9 +815,10 @@
    *     allowed: {attributes: Array, styles: Array, classes: Array},
    *     forbidden: {attributes: Array, styles: Array, classes: Array}
    *   }
-   *  }}
+   * }
+   * ```
    *
-   *  @see Drupal.FilterStatus
+   * @see Drupal.FilterStatus
    */
   Drupal.FilterHTMLRule = function () {
     return {
@@ -853,6 +893,9 @@
    * Initializes {@link Drupal.filterConfiguration}.
    *
    * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
+   *   Gets filter configuration from filter form input.
    */
   Drupal.behaviors.initializeFilterConfiguration = {
     attach: function (context, settings) {
diff --git a/core/modules/editor/js/editor.dialog.js b/core/modules/editor/js/editor.dialog.js
index 04b94035a0886f2e1899035788a454828b9701c7..5b0ad50a62b14741030d010be94d746b102d58a7 100644
--- a/core/modules/editor/js/editor.dialog.js
+++ b/core/modules/editor/js/editor.dialog.js
@@ -17,9 +17,13 @@
    * interface.
    *
    * @param {Drupal.Ajax} [ajax]
+   *   The Drupal.Ajax object.
    * @param {object} response
+   *   The server response from the ajax request.
    * @param {Array} response.values
+   *   The values that were saved.
    * @param {number} [status]
+   *   The status code from the ajax request.
    *
    * @fires event:editor:dialogsave
    */
diff --git a/core/modules/editor/js/editor.formattedTextEditor.js b/core/modules/editor/js/editor.formattedTextEditor.js
index 73014e8f907a3fdb590f1e32d509c9b10de35caa..98d79ba21767eac01bd426a32dbafd77e5e72dd5 100644
--- a/core/modules/editor/js/editor.formattedTextEditor.js
+++ b/core/modules/editor/js/editor.formattedTextEditor.js
@@ -51,6 +51,7 @@
      * @augments Drupal.quickedit.EditorView
      *
      * @param {object} options
+     *   Options for the editor view.
      */
     initialize: function (options) {
       Drupal.quickedit.EditorView.prototype.initialize.call(this, options);
@@ -70,6 +71,7 @@
      * @inheritdoc
      *
      * @return {jQuery}
+     *   The text element edited.
      */
     getEditedElement: function () {
       return this.$textElement;
@@ -79,7 +81,9 @@
      * @inheritdoc
      *
      * @param {object} fieldModel
+     *   The field model.
      * @param {string} state
+     *   The current state.
      */
     stateChange: function (fieldModel, state) {
       var editorModel = this.model;
@@ -172,6 +176,7 @@
      * @inheritdoc
      *
      * @return {object}
+     *   The sttings for the quick edit UI.
      */
     getQuickEditUISettings: function () {
       return {padding: true, unifiedToolbar: true, fullWidthToolbar: true, popup: false};
diff --git a/core/modules/editor/js/editor.js b/core/modules/editor/js/editor.js
index d2b9e5b70eff640c095f4099f8620c551bb2d5e3..706673c9c562b0f8649e0a0b7ef9ab18088bd3e3 100644
--- a/core/modules/editor/js/editor.js
+++ b/core/modules/editor/js/editor.js
@@ -59,6 +59,7 @@
    * Handles changes in text format.
    *
    * @param {jQuery.Event} event
+   *   The text format change event.
    */
   function onTextFormatChange(event) {
     var $select = $(event.target);
@@ -99,9 +100,10 @@
             text: Drupal.t('Cancel'),
             class: 'button',
             click: function () {
-              // Restore the active format ID: cancel changing text format. We cannot
-              // simply call event.preventDefault() because jQuery's change event is
-              // only triggered after the change has already been accepted.
+              // Restore the active format ID: cancel changing text format. We
+              // cannot simply call event.preventDefault() because jQuery's
+              // change event is only triggered after the change has already
+              // been accepted.
               $select.val(activeFormatID);
               confirmationDialog.close();
             }
@@ -138,6 +140,11 @@
    * Enables editors on text_format elements.
    *
    * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
+   *   Attaches an editor to an input element.
+   * @prop {Drupal~behaviorDetach} detach
+   *   Detaches an editor from an input element.
    */
   Drupal.behaviors.editor = {
     attach: function (context, settings) {
@@ -161,13 +168,13 @@
 
         // Directly attach this text editor, if the text format is enabled.
         if (settings.editor.formats[activeFormatID]) {
-          // XSS protection for the current text format/editor is performed on the
-          // server side, so we don't need to do anything special here.
+          // XSS protection for the current text format/editor is performed on
+          // the server side, so we don't need to do anything special here.
           Drupal.editorAttach(field, settings.editor.formats[activeFormatID]);
         }
-        // When there is no text editor for this text format, still track changes,
-        // because the user has the ability to switch to some text editor, other-
-        // wise this code would not be executed.
+        // When there is no text editor for this text format, still track
+        // changes, because the user has the ability to switch to some text
+        // editor, otherwise this code would not be executed.
         $(field).on('change.editor keypress.editor', function () {
           field.setAttribute('data-editor-value-is-changed', 'true');
           // Just knowing that the value was changed is enough, stop tracking.