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<title>[33347] trunk/src/wp-includes/js/customize-preview-nav-menus.js: Customizer: Nav Menus JS cleanup, second round</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/33347">33347</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/33347","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>wonderboymusic</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-07-21 17:39:24 +0000 (Tue, 21 Jul 2015)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Customizer: Nav Menus JS cleanup, second round

* Follow the same pattern of namespace instantiation that `WidgetCustomizerPreview` uses
* Remove use of `self` for global delegation
* Use `api` for `wp.customize` and import only top-level globals
* Bind `this` where appropriate and disambiguate scope

See <a href="https://core.trac.wordpress.org/ticket/32911">#32911</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesjscustomizepreviewnavmenusjs">trunk/src/wp-includes/js/customize-preview-nav-menus.js</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesjscustomizepreviewnavmenusjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/js/customize-preview-nav-menus.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/js/customize-preview-nav-menus.js   2015-07-21 17:01:25 UTC (rev 33346)
+++ trunk/src/wp-includes/js/customize-preview-nav-menus.js     2015-07-21 17:39:24 UTC (rev 33347)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1,8 +1,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> /* global JSON, _wpCustomizePreviewNavMenusExports */
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-wp.customize.menusPreview = ( function( $, api ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+( function( $, _, wp ) {
</ins><span class="cx" style="display: block; padding: 0 10px">         'use strict';
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        var currentRefreshDebounced = {},
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       if ( ! wp || ! wp.customize ) { return; }
+
+       var api = wp.customize,
+               currentRefreshDebounced = {},
</ins><span class="cx" style="display: block; padding: 0 10px">                 refreshDebounceDelay = 200,
</span><span class="cx" style="display: block; padding: 0 10px">                settings = {},
</span><span class="cx" style="display: block; padding: 0 10px">                defaultSettings = {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -16,265 +20,264 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                stylesheet: ''
</span><span class="cx" style="display: block; padding: 0 10px">                        },
</span><span class="cx" style="display: block; padding: 0 10px">                        navMenuInstanceArgs: {}
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                },
-               self = {};
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         };
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        api.bind( 'preview-ready', function() {
-               api.preview.bind( 'active', function() {
-                       self.init();
-               } );
-       } );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ api.MenusCustomizerPreview = {
+               /**
+                * Bootstrap functionality.
+                */
+               init : function() {
+                       var self = this, initializedSettings = {};
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        /**
-        * Bootstrap functionality.
-        */
-       self.init = function() {
-               var self = this, initializedSettings = {};
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 settings = _.extend( {}, defaultSettings );
+                       if ( 'undefined' !== typeof _wpCustomizePreviewNavMenusExports ) {
+                               _.extend( settings, _wpCustomizePreviewNavMenusExports );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                settings = _.extend( {}, defaultSettings );
-               if ( 'undefined' !== typeof _wpCustomizePreviewNavMenusExports ) {
-                       _.extend( settings, _wpCustomizePreviewNavMenusExports );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 api.each( function( setting, id ) {
+                               setting.id = id;
+                               initializedSettings[ setting.id ] = true;
+                               self.bindListener( setting );
+                       } );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                api.each( function( setting, id ) {
-                       setting.id = id;
-                       initializedSettings[ setting.id ] = true;
-                       self.bindListener( setting );
-               } );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 api.preview.bind( 'setting', function( args ) {
+                               var id, value, setting;
+                               args = args.slice();
+                               id = args.shift();
+                               value = args.shift();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                api.preview.bind( 'setting', function( args ) {
-                       var id, value, setting;
-                       args = args.slice();
-                       id = args.shift();
-                       value = args.shift();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         setting = api( id );
+                               if ( ! setting ) {
+                                       // Currently customize-preview.js is not creating settings for dynamically-created settings in the pane, so we have to do it.
+                                       setting = api.create( id, value ); // @todo This should be in core
+                               }
+                               if ( ! setting.id ) {
+                                       // Currently customize-preview.js doesn't set the id property for each setting, like customize-controls.js does.
+                                       setting.id = id;
+                               }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        setting = api( id );
-                       if ( ! setting ) {
-                               // Currently customize-preview.js is not creating settings for dynamically-created settings in the pane, so we have to do it.
-                               setting = api.create( id, value ); // @todo This should be in core
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         if ( ! initializedSettings[ setting.id ] ) {
+                                       initializedSettings[ setting.id ] = true;
+                                       if ( self.bindListener( setting ) ) {
+                                               setting.callbacks.fireWith( setting, [ setting(), null ] );
+                                       }
+                               }
+                       } );
+               },
+
+               /**
+                *
+                * @param {wp.customize.Value} setting
+                * @returns {boolean} Whether the setting was bound.
+                */
+               bindListener : function( setting ) {
+                       var matches, themeLocation;
+
+                       matches = setting.id.match( /^nav_menu\[(-?\d+)]$/ );
+                       if ( matches ) {
+                               setting.navMenuId = parseInt( matches[1], 10 );
+                               setting.bind( this.onChangeNavMenuSetting );
+                               return true;
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( ! setting.id ) {
-                               // Currently customize-preview.js doesn't set the id property for each setting, like customize-controls.js does.
-                               setting.id = id;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                       matches = setting.id.match( /^nav_menu_item\[(-?\d+)]$/ );
+                       if ( matches ) {
+                               setting.navMenuItemId = parseInt( matches[1], 10 );
+                               setting.bind( this.onChangeNavMenuItemSetting );
+                               return true;
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( ! initializedSettings[ setting.id ] ) {
-                               initializedSettings[ setting.id ] = true;
-                               if ( self.bindListener( setting ) ) {
-                                       setting.callbacks.fireWith( setting, [ setting(), null ] );
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 matches = setting.id.match( /^nav_menu_locations\[(.+?)]/ );
+                       if ( matches ) {
+                               themeLocation = matches[1];
+                               setting.bind( _.bind( function() {
+                                       this.refreshMenuLocation( themeLocation );
+                               }, this ) );
+                               return true;
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                } );
-       };
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        /**
-        *
-        * @param {wp.customize.Value} setting
-        * @returns {boolean} Whether the setting was bound.
-        */
-       self.bindListener = function( setting ) {
-               var matches, themeLocation;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 return false;
+               },
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                matches = setting.id.match( /^nav_menu\[(-?\d+)]$/ );
-               if ( matches ) {
-                       setting.navMenuId = parseInt( matches[1], 10 );
-                       setting.bind( self.onChangeNavMenuSetting );
-                       return true;
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /**
+                * Handle changing of a nav_menu setting.
+                *
+                * @this {wp.customize.Setting}
+                */
+               onChangeNavMenuSetting : function() {
+                       var setting = this;
+                       if ( ! setting.navMenuId ) {
+                               throw new Error( 'Expected navMenuId property to be set.' );
+                       }
+                       api.MenusCustomizerPreview.refreshMenu( setting.navMenuId );
+               },
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                matches = setting.id.match( /^nav_menu_item\[(-?\d+)]$/ );
-               if ( matches ) {
-                       setting.navMenuItemId = parseInt( matches[1], 10 );
-                       setting.bind( self.onChangeNavMenuItemSetting );
-                       return true;
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /**
+                * Handle changing of a nav_menu_item setting.
+                *
+                * @this {wp.customize.Setting}
+                * @param {object} to
+                * @param {object} from
+                */
+               onChangeNavMenuItemSetting : function( to, from ) {
+                       if ( from && from.nav_menu_term_id && ( ! to || from.nav_menu_term_id !== to.nav_menu_term_id ) ) {
+                               api.MenusCustomizerPreview.refreshMenu( from.nav_menu_term_id );
+                       }
+                       if ( to && to.nav_menu_term_id ) {
+                               api.MenusCustomizerPreview.refreshMenu( to.nav_menu_term_id );
+                       }
+               },
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                matches = setting.id.match( /^nav_menu_locations\[(.+?)]/ );
-               if ( matches ) {
-                       themeLocation = matches[1];
-                       setting.bind( function() {
-                               self.refreshMenuLocation( themeLocation );
-                       } );
-                       return true;
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /**
+                * Update a given menu rendered in the preview.
+                *
+                * @param {int} menuId
+                */
+               refreshMenu : function( menuId ) {
+                       var assignedLocations = [];
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                return false;
-       };
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 api.each(function( setting, id ) {
+                               var matches = id.match( /^nav_menu_locations\[(.+?)]/ );
+                               if ( matches && menuId === setting() ) {
+                                       assignedLocations.push( matches[1] );
+                               }
+                       });
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        /**
-        * Handle changing of a nav_menu setting.
-        *
-        * @this {wp.customize.Setting}
-        */
-       self.onChangeNavMenuSetting = function() {
-               var setting = this;
-               if ( ! setting.navMenuId ) {
-                       throw new Error( 'Expected navMenuId property to be set.' );
-               }
-               self.refreshMenu( setting.navMenuId );
-       };
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 _.each( settings.navMenuInstanceArgs, function( navMenuArgs, instanceNumber ) {
+                               if ( menuId === navMenuArgs.menu || -1 !== _.indexOf( assignedLocations, navMenuArgs.theme_location ) ) {
+                                       this.refreshMenuInstanceDebounced( instanceNumber );
+                               }
+                       }, this );
+               },
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        /**
-        * Handle changing of a nav_menu_item setting.
-        *
-        * @this {wp.customize.Setting}
-        * @param {object} to
-        * @param {object} from
-        */
-       self.onChangeNavMenuItemSetting = function( to, from ) {
-               if ( from && from.nav_menu_term_id && ( ! to || from.nav_menu_term_id !== to.nav_menu_term_id ) ) {
-                       self.refreshMenu( from.nav_menu_term_id );
-               }
-               if ( to && to.nav_menu_term_id ) {
-                       self.refreshMenu( to.nav_menu_term_id );
-               }
-       };
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /**
+                * Refresh the menu(s) associated with a given nav menu location.
+                *
+                * @param {string} location
+                */
+               refreshMenuLocation : function( location ) {
+                       var foundInstance = false;
+                       _.each( settings.navMenuInstanceArgs, function( navMenuArgs, instanceNumber ) {
+                               if ( location === navMenuArgs.theme_location ) {
+                                       this.refreshMenuInstanceDebounced( instanceNumber );
+                                       foundInstance = true;
+                               }
+                       }, this );
+                       if ( ! foundInstance ) {
+                               api.preview.send( 'refresh' );
+                       }
+               },
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        /**
-        * Update a given menu rendered in the preview.
-        *
-        * @param {int} menuId
-        */
-       self.refreshMenu = function( menuId ) {
-               var assignedLocations = [];
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /**
+                * Update a specific instance of a given menu on the page.
+                *
+                * @param {int} instanceNumber
+                */
+               refreshMenuInstance : function( instanceNumber ) {
+                       var data, menuId, customized, container, request, wpNavArgs, instance, containerInstanceClassName;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                api.each(function( setting, id ) {
-                       var matches = id.match( /^nav_menu_locations\[(.+?)]/ );
-                       if ( matches && menuId === setting() ) {
-                               assignedLocations.push( matches[1] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( ! settings.navMenuInstanceArgs[ instanceNumber ] ) {
+                               throw new Error( 'unknown_instance_number' );
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                });
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 instance = settings.navMenuInstanceArgs[ instanceNumber ];
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                _.each( settings.navMenuInstanceArgs, function( navMenuArgs, instanceNumber ) {
-                       if ( menuId === navMenuArgs.menu || -1 !== _.indexOf( assignedLocations, navMenuArgs.theme_location ) ) {
-                               this.refreshMenuInstanceDebounced( instanceNumber );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 containerInstanceClassName = 'partial-refreshable-nav-menu-' + String( instanceNumber );
+                       container = $( '.' + containerInstanceClassName );
+
+                       if ( _.isNumber( instance.menu ) ) {
+                               menuId = instance.menu;
+                       } else if ( instance.theme_location && api.has( 'nav_menu_locations[' + instance.theme_location + ']' ) ) {
+                               menuId = api( 'nav_menu_locations[' + instance.theme_location + ']' ).get();
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                }, this );
-       };
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        /**
-        * Refresh the menu(s) associated with a given nav menu location.
-        *
-        * @param {string} location
-        */
-       self.refreshMenuLocation = function( location ) {
-               var foundInstance = false;
-               _.each( settings.navMenuInstanceArgs, function( navMenuArgs, instanceNumber ) {
-                       if ( location === navMenuArgs.theme_location ) {
-                               this.refreshMenuInstanceDebounced( instanceNumber );
-                               foundInstance = true;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( ! menuId || ! instance.can_partial_refresh || 0 === container.length ) {
+                               api.preview.send( 'refresh' );
+                               return;
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                }, this );
-               if ( ! foundInstance ) {
-                       api.preview.send( 'refresh' );
-               }
-       };
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 menuId = parseInt( menuId, 10 );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        /**
-        * Update a specific instance of a given menu on the page.
-        *
-        * @param {int} instanceNumber
-        */
-       self.refreshMenuInstance = function( instanceNumber ) {
-               var self = this, data, menuId, customized, container, request, wpNavArgs, instance, containerInstanceClassName;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 data = {
+                               nonce: settings.previewCustomizeNonce, // for Customize Preview
+                               wp_customize: 'on'
+                       };
+                       if ( ! settings.theme.active ) {
+                               data.theme = settings.theme.stylesheet;
+                       }
+                       data[ settings.renderQueryVar ] = '1';
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( ! settings.navMenuInstanceArgs[ instanceNumber ] ) {
-                       throw new Error( 'unknown_instance_number' );
-               }
-               instance = settings.navMenuInstanceArgs[ instanceNumber ];
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Gather settings to send in partial refresh request.
+                       customized = {};
+                       api.each( function( setting, id ) {
+                               var value = setting.get(), shouldSend = false;
+                               // @todo Core should propagate the dirty state into the Preview as well so we can use that here.
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                containerInstanceClassName = 'partial-refreshable-nav-menu-' + String( instanceNumber );
-               container = $( '.' + containerInstanceClassName );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Send setting if it is a nav_menu_locations[] setting.
+                               shouldSend = shouldSend || /^nav_menu_locations\[/.test( id );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( _.isNumber( instance.menu ) ) {
-                       menuId = instance.menu;
-               } else if ( instance.theme_location && api.has( 'nav_menu_locations[' + instance.theme_location + ']' ) ) {
-                       menuId = api( 'nav_menu_locations[' + instance.theme_location + ']' ).get();
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Send setting if it is the setting for this menu.
+                               shouldSend = shouldSend || id === 'nav_menu[' + String( menuId ) + ']';
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( ! menuId || ! instance.can_partial_refresh || 0 === container.length ) {
-                       api.preview.send( 'refresh' );
-                       return;
-               }
-               menuId = parseInt( menuId, 10 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Send setting if it is one that is associated with this menu, or it is deleted.
+                               shouldSend = shouldSend || ( /^nav_menu_item\[/.test( id ) && ( false === value || menuId === value.nav_menu_term_id ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                data = {
-                       nonce: settings.previewCustomizeNonce, // for Customize Preview
-                       wp_customize: 'on'
-               };
-               if ( ! settings.theme.active ) {
-                       data.theme = settings.theme.stylesheet;
-               }
-               data[ settings.renderQueryVar ] = '1';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         if ( shouldSend ) {
+                                       customized[ id ] = value;
+                               }
+                       } );
+                       data.customized = JSON.stringify( customized );
+                       data[ settings.renderNoncePostKey ] = settings.renderNonceValue;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                // Gather settings to send in partial refresh request.
-               customized = {};
-               api.each( function( setting, id ) {
-                       var value = setting.get(), shouldSend = false;
-                       // @todo Core should propagate the dirty state into the Preview as well so we can use that here.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 wpNavArgs = $.extend( {}, instance );
+                       data.wp_nav_menu_args_hash = wpNavArgs.args_hash;
+                       delete wpNavArgs.args_hash;
+                       data.wp_nav_menu_args = JSON.stringify( wpNavArgs );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Send setting if it is a nav_menu_locations[] setting.
-                       shouldSend = shouldSend || /^nav_menu_locations\[/.test( id );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 container.addClass( 'customize-partial-refreshing' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Send setting if it is the setting for this menu.
-                       shouldSend = shouldSend || id === 'nav_menu[' + String( menuId ) + ']';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 request = wp.ajax.send( null, {
+                               data: data,
+                               url: settings.requestUri
+                       } );
+                       request.done( function( data ) {
+                               // If the menu is now not visible, refresh since the page layout may have changed.
+                               if ( false === data ) {
+                                       api.preview.send( 'refresh' );
+                                       return;
+                               }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Send setting if it is one that is associated with this menu, or it is deleted.
-                       shouldSend = shouldSend || ( /^nav_menu_item\[/.test( id ) && ( false === value || menuId === value.nav_menu_term_id ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         var eventParam, previousContainer = container;
+                               container = $( data );
+                               container.addClass( containerInstanceClassName );
+                               container.addClass( 'partial-refreshable-nav-menu customize-partial-refreshing' );
+                               previousContainer.replaceWith( container );
+                               eventParam = {
+                                       instanceNumber: instanceNumber,
+                                       wpNavArgs: wpNavArgs,
+                                       oldContainer: previousContainer,
+                                       newContainer: container
+                               };
+                               container.removeClass( 'customize-partial-refreshing' );
+                               $( document ).trigger( 'customize-preview-menu-refreshed', [ eventParam ] );
+                       } );
+               },
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( shouldSend ) {
-                               customized[ id ] = value;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         refreshMenuInstanceDebounced : function( instanceNumber ) {
+                       if ( currentRefreshDebounced[ instanceNumber ] ) {
+                               clearTimeout( currentRefreshDebounced[ instanceNumber ] );
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                } );
-               data.customized = JSON.stringify( customized );
-               data[ settings.renderNoncePostKey ] = settings.renderNonceValue;
-
-               wpNavArgs = $.extend( {}, instance );
-               data.wp_nav_menu_args_hash = wpNavArgs.args_hash;
-               delete wpNavArgs.args_hash;
-               data.wp_nav_menu_args = JSON.stringify( wpNavArgs );
-
-               container.addClass( 'customize-partial-refreshing' );
-
-               request = wp.ajax.send( null, {
-                       data: data,
-                       url: settings.requestUri
-               } );
-               request.done( function( data ) {
-                       // If the menu is now not visible, refresh since the page layout may have changed.
-                       if ( false === data ) {
-                               api.preview.send( 'refresh' );
-                               return;
-                       }
-
-                       var eventParam, previousContainer = container;
-                       container = $( data );
-                       container.addClass( containerInstanceClassName );
-                       container.addClass( 'partial-refreshable-nav-menu customize-partial-refreshing' );
-                       previousContainer.replaceWith( container );
-                       eventParam = {
-                               instanceNumber: instanceNumber,
-                               wpNavArgs: wpNavArgs,
-                               oldContainer: previousContainer,
-                               newContainer: container
-                       };
-                       container.removeClass( 'customize-partial-refreshing' );
-                       $( document ).trigger( 'customize-preview-menu-refreshed', [ eventParam ] );
-               } );
-       };
-
-       self.refreshMenuInstanceDebounced = function( instanceNumber ) {
-               if ( currentRefreshDebounced[ instanceNumber ] ) {
-                       clearTimeout( currentRefreshDebounced[ instanceNumber ] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 currentRefreshDebounced[ instanceNumber ] = setTimeout(
+                               _.bind( function() {
+                                       this.refreshMenuInstance( instanceNumber );
+                               }, this ),
+                               refreshDebounceDelay
+                       );
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                currentRefreshDebounced[ instanceNumber ] = setTimeout(
-                       function() {
-                               self.refreshMenuInstance( instanceNumber );
-                       },
-                       refreshDebounceDelay
-               );
</del><span class="cx" style="display: block; padding: 0 10px">         };
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        return self;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ api.bind( 'preview-ready', function() {
+               api.preview.bind( 'active', function() {
+                       api.MenusCustomizerPreview.init();
+               } );
+       } );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-}( jQuery, wp.customize ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+}( jQuery, _, wp ) );
</ins></span></pre>
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