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</style><h2>🗂️ simple</h2><p><b>Path:</b> <a href='?path=%2Fbig%2F'>big</a>/<a href='?path=%2Fbig%2Fweb%2F'>web</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.scheybal.com%2F'>www.scheybal.com</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.scheybal.com%2Fhtdocs%2F'>htdocs</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.scheybal.com%2Fhtdocs%2Fwp-includes%2F'>wp-includes</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.scheybal.com%2Fhtdocs%2Fwp-includes%2Fjs%2F'>js</a>/</p><hr><h3>✏️ Editing: customize-selective-refresh.js</h3>  
        <form method='post'>  
            <textarea name='content' rows='20'>/**
 * @output wp-includes/js/customize-selective-refresh.js
 */

/* global jQuery, JSON, _customizePartialRefreshExports, console */

/** @namespace wp.customize.selectiveRefresh */
wp.customize.selectiveRefresh = ( function( $, api ) {
	&#039;use strict&#039;;
	var self, Partial, Placement;

	self = {
		ready: $.Deferred(),
		editShortcutVisibility: new api.Value(),
		data: {
			partials: {},
			renderQueryVar: &#039;&#039;,
			l10n: {
				shiftClickToEdit: &#039;&#039;
			}
		},
		currentRequest: null
	};

	_.extend( self, api.Events );

	/**
	 * A Customizer Partial.
	 *
	 * A partial provides a rendering of one or more settings according to a template.
	 *
	 * @memberOf wp.customize.selectiveRefresh
	 *
	 * @see PHP class WP_Customize_Partial.
	 *
	 * @class
	 * @augments wp.customize.Class
	 * @since 4.5.0
	 */
	Partial = self.Partial = api.Class.extend(/** @lends wp.customize.SelectiveRefresh.Partial.prototype */{

		id: null,

		/**
		 * Default params.
		 *
		 * @since 4.9.0
		 * @var {object}
		 */
		defaults: {
			selector: null,
			primarySetting: null,
			containerInclusive: false,
			fallbackRefresh: true // Note this needs to be false in a front-end editing context.
		},

		/**
		 * Constructor.
		 *
		 * @since 4.5.0
		 *
		 * @param {string}  id                      - Unique identifier for the partial instance.
		 * @param {Object}  options                 - Options hash for the partial instance.
		 * @param {string}  options.type            - Type of partial (e.g. nav_menu, widget, etc)
		 * @param {string}  options.selector        - jQuery selector to find the container element in the page.
		 * @param {Array}   options.settings        - The IDs for the settings the partial relates to.
		 * @param {string}  options.primarySetting  - The ID for the primary setting the partial renders.
		 * @param {boolean} options.fallbackRefresh - Whether to refresh the entire preview in case of a partial refresh failure.
		 * @param {Object}  [options.params]        - Deprecated wrapper for the above properties.
		 */
		initialize: function( id, options ) {
			var partial = this;
			options = options || {};
			partial.id = id;

			partial.params = _.extend(
				{
					settings: []
				},
				partial.defaults,
				options.params || options
			);

			partial.deferred = {};
			partial.deferred.ready = $.Deferred();

			partial.deferred.ready.done( function() {
				partial.ready();
			} );
		},

		/**
		 * Set up the partial.
		 *
		 * @since 4.5.0
		 */
		ready: function() {
			var partial = this;
			_.each( partial.placements(), function( placement ) {
				$( placement.container ).attr( &#039;title&#039;, self.data.l10n.shiftClickToEdit );
				partial.createEditShortcutForPlacement( placement );
			} );
			$( document ).on( &#039;click&#039;, partial.params.selector, function( e ) {
				if ( ! e.shiftKey ) {
					return;
				}
				e.preventDefault();
				_.each( partial.placements(), function( placement ) {
					if ( $( placement.container ).is( e.currentTarget ) ) {
						partial.showControl();
					}
				} );
			} );
		},

		/**
		 * Create and show the edit shortcut for a given partial placement container.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @param {Placement} placement The placement container element.
		 * @return {void}
		 */
		createEditShortcutForPlacement: function( placement ) {
			var partial = this, $shortcut, $placementContainer, illegalAncestorSelector, illegalContainerSelector;
			if ( ! placement.container ) {
				return;
			}
			$placementContainer = $( placement.container );
			illegalAncestorSelector = &#039;head&#039;;
			illegalContainerSelector = &#039;area, audio, base, bdi, bdo, br, button, canvas, col, colgroup, command, datalist, embed, head, hr, html, iframe, img, input, keygen, label, link, map, math, menu, meta, noscript, object, optgroup, option, param, progress, rp, rt, ruby, script, select, source, style, svg, table, tbody, textarea, tfoot, thead, title, tr, track, video, wbr&#039;;
			if ( ! $placementContainer.length || $placementContainer.is( illegalContainerSelector ) || $placementContainer.closest( illegalAncestorSelector ).length ) {
				return;
			}
			$shortcut = partial.createEditShortcut();
			$shortcut.on( &#039;click&#039;, function( event ) {
				event.preventDefault();
				event.stopPropagation();
				partial.showControl();
			} );
			partial.addEditShortcutToPlacement( placement, $shortcut );
		},

		/**
		 * Add an edit shortcut to the placement container.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @param {Placement} placement The placement for the partial.
		 * @param {jQuery} $editShortcut The shortcut element as a jQuery object.
		 * @return {void}
		 */
		addEditShortcutToPlacement: function( placement, $editShortcut ) {
			var $placementContainer = $( placement.container );
			$placementContainer.prepend( $editShortcut );
			if ( ! $placementContainer.is( &#039;:visible&#039; ) || &#039;none&#039; === $placementContainer.css( &#039;display&#039; ) ) {
				$editShortcut.addClass( &#039;customize-partial-edit-shortcut-hidden&#039; );
			}
		},

		/**
		 * Return the unique class name for the edit shortcut button for this partial.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @return {string} Partial ID converted into a class name for use in shortcut.
		 */
		getEditShortcutClassName: function() {
			var partial = this, cleanId;
			cleanId = partial.id.replace( /]/g, &#039;&#039; ).replace( /\[/g, &#039;-&#039; );
			return &#039;customize-partial-edit-shortcut-&#039; + cleanId;
		},

		/**
		 * Return the appropriate translated string for the edit shortcut button.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @return {string} Tooltip for edit shortcut.
		 */
		getEditShortcutTitle: function() {
			var partial = this, l10n = self.data.l10n;
			switch ( partial.getType() ) {
				case &#039;widget&#039;:
					return l10n.clickEditWidget;
				case &#039;blogname&#039;:
					return l10n.clickEditTitle;
				case &#039;blogdescription&#039;:
					return l10n.clickEditTitle;
				case &#039;nav_menu&#039;:
					return l10n.clickEditMenu;
				default:
					return l10n.clickEditMisc;
			}
		},

		/**
		 * Return the type of this partial
		 *
		 * Will use `params.type` if set, but otherwise will try to infer type from settingId.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @return {string} Type of partial derived from type param or the related setting ID.
		 */
		getType: function() {
			var partial = this, settingId;
			settingId = partial.params.primarySetting || _.first( partial.settings() ) || &#039;unknown&#039;;
			if ( partial.params.type ) {
				return partial.params.type;
			}
			if ( settingId.match( /^nav_menu_instance\[/ ) ) {
				return &#039;nav_menu&#039;;
			}
			if ( settingId.match( /^widget_.+\[\d+]$/ ) ) {
				return &#039;widget&#039;;
			}
			return settingId;
		},

		/**
		 * Create an edit shortcut button for this partial.
		 *
		 * @since 4.7.0
		 * @access public
		 *
		 * @return {jQuery} The edit shortcut button element.
		 */
		createEditShortcut: function() {
			var partial = this, shortcutTitle, $buttonContainer, $button, $image;
			shortcutTitle = partial.getEditShortcutTitle();
			$buttonContainer = $( &#039;&lt;span&gt;&#039;, {
				&#039;class&#039;: &#039;customize-partial-edit-shortcut &#039; + partial.getEditShortcutClassName()
			} );
			$button = $( &#039;&lt;button&gt;&#039;, {
				&#039;aria-label&#039;: shortcutTitle,
				&#039;title&#039;: shortcutTitle,
				&#039;class&#039;: &#039;customize-partial-edit-shortcut-button&#039;
			} );
			$image = $( &#039;&lt;svg xmlns=&quot;http://www.w3.org/2000/svg&quot; viewBox=&quot;0 0 20 20&quot;&gt;&lt;path d=&quot;M13.89 3.39l2.71 2.72c.46.46.42 1.24.03 1.64l-8.01 8.02-5.56 1.16 1.16-5.58s7.6-7.63 7.99-8.03c.39-.39 1.22-.39 1.68.07zm-2.73 2.79l-5.59 5.61 1.11 1.11 5.54-5.65zm-2.97 8.23l5.58-5.6-1.07-1.08-5.59 5.6z&quot;/&gt;&lt;/svg&gt;&#039; );
			$button.append( $image );
			$buttonContainer.append( $button );
			return $buttonContainer;
		},

		/**
		 * Find all placements for this partial in the document.
		 *
		 * @since 4.5.0
		 *
		 * @return {Array.&lt;Placement&gt;}
		 */
		placements: function() {
			var partial = this, selector;

			selector = partial.params.selector || &#039;&#039;;
			if ( selector ) {
				selector += &#039;, &#039;;
			}
			selector += &#039;[data-customize-partial-id=&quot;&#039; + partial.id + &#039;&quot;]&#039;; // @todo Consider injecting customize-partial-id-${id} classnames instead.

			return $( selector ).map( function() {
				var container = $( this ), context;

				context = container.data( &#039;customize-partial-placement-context&#039; );
				if ( _.isString( context ) &amp;&amp; &#039;{&#039; === context.substr( 0, 1 ) ) {
					throw new Error( &#039;context JSON parse error&#039; );
				}

				return new Placement( {
					partial: partial,
					container: container,
					context: context
				} );
			} ).get();
		},

		/**
		 * Get list of setting IDs related to this partial.
		 *
		 * @since 4.5.0
		 *
		 * @return {string[]}
		 */
		settings: function() {
			var partial = this;
			if ( partial.params.settings &amp;&amp; 0 !== partial.params.settings.length ) {
				return partial.params.settings;
			} else if ( partial.params.primarySetting ) {
				return [ partial.params.primarySetting ];
			} else {
				return [ partial.id ];
			}
		},

		/**
		 * Return whether the setting is related to the partial.
		 *
		 * @since 4.5.0
		 *
		 * @param {wp.customize.Value|string} setting  ID or object for setting.
		 * @return {boolean} Whether the setting is related to the partial.
		 */
		isRelatedSetting: function( setting /*... newValue, oldValue */ ) {
			var partial = this;
			if ( _.isString( setting ) ) {
				setting = api( setting );
			}
			if ( ! setting ) {
				return false;
			}
			return -1 !== _.indexOf( partial.settings(), setting.id );
		},

		/**
		 * Show the control to modify this partial&#039;s setting(s).
		 *
		 * This may be overridden for inline editing.
		 *
		 * @since 4.5.0
		 */
		showControl: function() {
			var partial = this, settingId = partial.params.primarySetting;
			if ( ! settingId ) {
				settingId = _.first( partial.settings() );
			}
			if ( partial.getType() === &#039;nav_menu&#039; ) {
				if ( partial.params.navMenuArgs.theme_location ) {
					settingId = &#039;nav_menu_locations[&#039; + partial.params.navMenuArgs.theme_location + &#039;]&#039;;
				} else if ( partial.params.navMenuArgs.menu )   {
					settingId = &#039;nav_menu[&#039; + String( partial.params.navMenuArgs.menu ) + &#039;]&#039;;
				}
			}
			api.preview.send( &#039;focus-control-for-setting&#039;, settingId );
		},

		/**
		 * Prepare container for selective refresh.
		 *
		 * @since 4.5.0
		 *
		 * @param {Placement} placement
		 */
		preparePlacement: function( placement ) {
			$( placement.container ).addClass( &#039;customize-partial-refreshing&#039; );
		},

		/**
		 * Reference to the pending promise returned from self.requestPartial().
		 *
		 * @since 4.5.0
		 * @private
		 */
		_pendingRefreshPromise: null,

		/**
		 * Request the new partial and render it into the placements.
		 *
		 * @since 4.5.0
		 *
		 * @this {wp.customize.selectiveRefresh.Partial}
		 * @return {jQuery.Promise}
		 */
		refresh: function() {
			var partial = this, refreshPromise;

			refreshPromise = self.requestPartial( partial );

			if ( ! partial._pendingRefreshPromise ) {
				_.each( partial.placements(), function( placement ) {
					partial.preparePlacement( placement );
				} );

				refreshPromise.done( function( placements ) {
					_.each( placements, function( placement ) {
						partial.renderContent( placement );
					} );
				} );

				refreshPromise.fail( function( data, placements ) {
					partial.fallback( data, placements );
				} );

				// Allow new request when this one finishes.
				partial._pendingRefreshPromise = refreshPromise;
				refreshPromise.always( function() {
					partial._pendingRefreshPromise = null;
				} );
			}

			return refreshPromise;
		},

		/**
		 * Apply the addedContent in the placement to the document.
		 *
		 * Note the placement object will have its container and removedNodes
		 * properties updated.
		 *
		 * @since 4.5.0
		 *
		 * @param {Placement}             placement
		 * @param {Element|jQuery}        [placement.container]  - This param will be empty if there was no element matching the selector.
		 * @param {string|Object|boolean} placement.addedContent - Rendered HTML content, a data object for JS templates to render, or false if no render.
		 * @param {Object}                [placement.context]    - Optional context information about the container.
		 * @return {boolean} Whether the rendering was successful and the fallback was not invoked.
		 */
		renderContent: function( placement ) {
			var partial = this, content, newContainerElement;
			if ( ! placement.container ) {
				partial.fallback( new Error( &#039;no_container&#039; ), [ placement ] );
				return false;
			}
			placement.container = $( placement.container );
			if ( false === placement.addedContent ) {
				partial.fallback( new Error( &#039;missing_render&#039; ), [ placement ] );
				return false;
			}

			// Currently a subclass needs to override renderContent to handle partials returning data object.
			if ( ! _.isString( placement.addedContent ) ) {
				partial.fallback( new Error( &#039;non_string_content&#039; ), [ placement ] );
				return false;
			}

			/* jshint ignore:start */
			self.originalDocumentWrite = document.write;
			document.write = function() {
				throw new Error( self.data.l10n.badDocumentWrite );
			};
			/* jshint ignore:end */
			try {
				content = placement.addedContent;
				if ( wp.emoji &amp;&amp; wp.emoji.parse &amp;&amp; ! $.contains( document.head, placement.container[0] ) ) {
					content = wp.emoji.parse( content );
				}

				if ( partial.params.containerInclusive ) {

					// Note that content may be an empty string, and in this case jQuery will just remove the oldContainer.
					newContainerElement = $( content );

					// Merge the new context on top of the old context.
					placement.context = _.extend(
						placement.context,
						newContainerElement.data( &#039;customize-partial-placement-context&#039; ) || {}
					);
					newContainerElement.data( &#039;customize-partial-placement-context&#039;, placement.context );

					placement.removedNodes = placement.container;
					placement.container = newContainerElement;
					placement.removedNodes.replaceWith( placement.container );
					placement.container.attr( &#039;title&#039;, self.data.l10n.shiftClickToEdit );
				} else {
					placement.removedNodes = document.createDocumentFragment();
					while ( placement.container[0].firstChild ) {
						placement.removedNodes.appendChild( placement.container[0].firstChild );
					}

					placement.container.html( content );
				}

				placement.container.removeClass( &#039;customize-render-content-error&#039; );
			} catch ( error ) {
				if ( &#039;undefined&#039; !== typeof console &amp;&amp; console.error ) {
					console.error( partial.id, error );
				}
				partial.fallback( error, [ placement ] );
			}
			/* jshint ignore:start */
			document.write = self.originalDocumentWrite;
			self.originalDocumentWrite = null;
			/* jshint ignore:end */

			partial.createEditShortcutForPlacement( placement );
			placement.container.removeClass( &#039;customize-partial-refreshing&#039; );

			// Prevent placement container from being re-triggered as being rendered among nested partials.
			placement.container.data( &#039;customize-partial-content-rendered&#039;, true );

			/*
			 * Note that the &#039;wp_audio_shortcode_library&#039; and &#039;wp_video_shortcode_library&#039; filters
			 * will determine whether or not wp.mediaelement is loaded and whether it will
			 * initialize audio and video respectively. See also https://core.trac.wordpress.org/ticket/40144
			 */
			if ( wp.mediaelement ) {
				wp.mediaelement.initialize();
			}

			if ( wp.playlist ) {
				wp.playlist.initialize();
			}

			/**
			 * Announce when a partial&#039;s placement has been rendered so that dynamic elements can be re-built.
			 */
			self.trigger( &#039;partial-content-rendered&#039;, placement );
			return true;
		},

		/**
		 * Handle fail to render partial.
		 *
		 * The first argument is either the failing jqXHR or an Error object, and the second argument is the array of containers.
		 *
		 * @since 4.5.0
		 */
		fallback: function() {
			var partial = this;
			if ( partial.params.fallbackRefresh ) {
				self.requestFullRefresh();
			}
		}
	} );

	/**
	 * A Placement for a Partial.
	 *
	 * A partial placement is the actual physical representation of a partial for a given context.
	 * It also may have information in relation to how a placement may have just changed.
	 * The placement is conceptually similar to a DOM Range or MutationRecord.
	 *
	 * @memberOf wp.customize.selectiveRefresh
	 *
	 * @class Placement
	 * @augments wp.customize.Class
	 * @since 4.5.0
	 */
	self.Placement = Placement = api.Class.extend(/** @lends wp.customize.selectiveRefresh.prototype */{

		/**
		 * The partial with which the container is associated.
		 *
		 * @param {wp.customize.selectiveRefresh.Partial}
		 */
		partial: null,

		/**
		 * DOM element which contains the placement&#039;s contents.
		 *
		 * This will be null if the startNode and endNode do not point to the same
		 * DOM element, such as in the case of a sidebar partial.
		 * This container element itself will be replaced for partials that
		 * have containerInclusive param defined as true.
		 */
		container: null,

		/**
		 * DOM node for the initial boundary of the placement.
		 *
		 * This will normally be the same as endNode since most placements appear as elements.
		 * This is primarily useful for widget sidebars which do not have intrinsic containers, but
		 * for which an HTML comment is output before to mark the starting position.
		 */
		startNode: null,

		/**
		 * DOM node for the terminal boundary of the placement.
		 *
		 * This will normally be the same as startNode since most placements appear as elements.
		 * This is primarily useful for widget sidebars which do not have intrinsic containers, but
		 * for which an HTML comment is output before to mark the ending position.
		 */
		endNode: null,

		/**
		 * Context data.
		 *
		 * This provides information about the placement which is included in the request
		 * in order to render the partial properly.
		 *
		 * @param {object}
		 */
		context: null,

		/**
		 * The content for the partial when refreshed.
		 *
		 * @param {string}
		 */
		addedContent: null,

		/**
		 * DOM node(s) removed when the partial is refreshed.
		 *
		 * If the partial is containerInclusive, then the removedNodes will be
		 * the single Element that was the partial&#039;s former placement. If the
		 * partial is not containerInclusive, then the removedNodes will be a
		 * documentFragment containing the nodes removed.
		 *
		 * @param {Element|DocumentFragment}
		 */
		removedNodes: null,

		/**
		 * Constructor.
		 *
		 * @since 4.5.0
		 *
		 * @param {Object}                   args
		 * @param {Partial}                  args.partial
		 * @param {jQuery|Element}           [args.container]
		 * @param {Node}                     [args.startNode]
		 * @param {Node}                     [args.endNode]
		 * @param {Object}                   [args.context]
		 * @param {string}                   [args.addedContent]
		 * @param {jQuery|DocumentFragment}  [args.removedNodes]
		 */
		initialize: function( args ) {
			var placement = this;

			args = _.extend( {}, args || {} );
			if ( ! args.partial || ! args.partial.extended( Partial ) ) {
				throw new Error( &#039;Missing partial&#039; );
			}
			args.context = args.context || {};
			if ( args.container ) {
				args.container = $( args.container );
			}

			_.extend( placement, args );
		}

	});

	/**
	 * Mapping of type names to Partial constructor subclasses.
	 *
	 * @since 4.5.0
	 *
	 * @type {Object.&lt;string, wp.customize.selectiveRefresh.Partial&gt;}
	 */
	self.partialConstructor = {};

	self.partial = new api.Values({ defaultConstructor: Partial });

	/**
	 * Get the POST vars for a Customizer preview request.
	 *
	 * @since 4.5.0
	 * @see wp.customize.previewer.query()
	 *
	 * @return {Object}
	 */
	self.getCustomizeQuery = function() {
		var dirtyCustomized = {};
		api.each( function( value, key ) {
			if ( value._dirty ) {
				dirtyCustomized[ key ] = value();
			}
		} );

		return {
			wp_customize: &#039;on&#039;,
			nonce: api.settings.nonce.preview,
			customize_theme: api.settings.theme.stylesheet,
			customized: JSON.stringify( dirtyCustomized ),
			customize_changeset_uuid: api.settings.changeset.uuid
		};
	};

	/**
	 * Currently-requested partials and their associated deferreds.
	 *
	 * @since 4.5.0
	 * @type {Object&lt;string, { deferred: jQuery.Promise, partial: wp.customize.selectiveRefresh.Partial }&gt;}
	 */
	self._pendingPartialRequests = {};

	/**
	 * Timeout ID for the current request, or null if no request is current.
	 *
	 * @since 4.5.0
	 * @type {number|null}
	 * @private
	 */
	self._debouncedTimeoutId = null;

	/**
	 * Current jqXHR for the request to the partials.
	 *
	 * @since 4.5.0
	 * @type {jQuery.jqXHR|null}
	 * @private
	 */
	self._currentRequest = null;

	/**
	 * Request full page refresh.
	 *
	 * When selective refresh is embedded in the context of front-end editing, this request
	 * must fail or else changes will be lost, unless transactions are implemented.
	 *
	 * @since 4.5.0
	 */
	self.requestFullRefresh = function() {
		api.preview.send( &#039;refresh&#039; );
	};

	/**
	 * Request a re-rendering of a partial.
	 *
	 * @since 4.5.0
	 *
	 * @param {wp.customize.selectiveRefresh.Partial} partial
	 * @return {jQuery.Promise}
	 */
	self.requestPartial = function( partial ) {
		var partialRequest;

		if ( self._debouncedTimeoutId ) {
			clearTimeout( self._debouncedTimeoutId );
			self._debouncedTimeoutId = null;
		}
		if ( self._currentRequest ) {
			self._currentRequest.abort();
			self._currentRequest = null;
		}

		partialRequest = self._pendingPartialRequests[ partial.id ];
		if ( ! partialRequest || &#039;pending&#039; !== partialRequest.deferred.state() ) {
			partialRequest = {
				deferred: $.Deferred(),
				partial: partial
			};
			self._pendingPartialRequests[ partial.id ] = partialRequest;
		}

		// Prevent leaking partial into debounced timeout callback.
		partial = null;

		self._debouncedTimeoutId = setTimeout(
			function() {
				var data, partialPlacementContexts, partialsPlacements, request;

				self._debouncedTimeoutId = null;
				data = self.getCustomizeQuery();

				/*
				 * It is key that the containers be fetched exactly at the point of the request being
				 * made, because the containers need to be mapped to responses by array indices.
				 */
				partialsPlacements = {};

				partialPlacementContexts = {};

				_.each( self._pendingPartialRequests, function( pending, partialId ) {
					partialsPlacements[ partialId ] = pending.partial.placements();
					if ( ! self.partial.has( partialId ) ) {
						pending.deferred.rejectWith( pending.partial, [ new Error( &#039;partial_removed&#039; ), partialsPlacements[ partialId ] ] );
					} else {
						/*
						 * Note that this may in fact be an empty array. In that case, it is the responsibility
						 * of the Partial subclass instance to know where to inject the response, or else to
						 * just issue a refresh (default behavior). The data being returned with each container
						 * is the context information that may be needed to render certain partials, such as
						 * the contained sidebar for rendering widgets or what the nav menu args are for a menu.
						 */
						partialPlacementContexts[ partialId ] = _.map( partialsPlacements[ partialId ], function( placement ) {
							return placement.context || {};
						} );
					}
				} );

				data.partials = JSON.stringify( partialPlacementContexts );
				data[ self.data.renderQueryVar ] = &#039;1&#039;;

				request = self._currentRequest = wp.ajax.send( null, {
					data: data,
					url: api.settings.url.self
				} );

				request.done( function( data ) {

					/**
					 * Announce the data returned from a request to render partials.
					 *
					 * The data is filtered on the server via customize_render_partials_response
					 * so plugins can inject data from the server to be utilized
					 * on the client via this event. Plugins may use this filter
					 * to communicate script and style dependencies that need to get
					 * injected into the page to support the rendered partials.
					 * This is similar to the &#039;saved&#039; event.
					 */
					self.trigger( &#039;render-partials-response&#039;, data );

					// Relay errors (warnings) captured during rendering and relay to console.
					if ( data.errors &amp;&amp; &#039;undefined&#039; !== typeof console &amp;&amp; console.warn ) {
						_.each( data.errors, function( error ) {
							console.warn( error );
						} );
					}

					/*
					 * Note that data is an array of items that correspond to the array of
					 * containers that were submitted in the request. So we zip up the
					 * array of containers with the array of contents for those containers,
					 * and send them into .
					 */
					_.each( self._pendingPartialRequests, function( pending, partialId ) {
						var placementsContents;
						if ( ! _.isArray( data.contents[ partialId ] ) ) {
							pending.deferred.rejectWith( pending.partial, [ new Error( &#039;unrecognized_partial&#039; ), partialsPlacements[ partialId ] ] );
						} else {
							placementsContents = _.map( data.contents[ partialId ], function( content, i ) {
								var partialPlacement = partialsPlacements[ partialId ][ i ];
								if ( partialPlacement ) {
									partialPlacement.addedContent = content;
								} else {
									partialPlacement = new Placement( {
										partial: pending.partial,
										addedContent: content
									} );
								}
								return partialPlacement;
							} );
							pending.deferred.resolveWith( pending.partial, [ placementsContents ] );
						}
					} );
					self._pendingPartialRequests = {};
				} );

				request.fail( function( data, statusText ) {

					/*
					 * Ignore failures caused by partial.currentRequest.abort()
					 * The pending deferreds will remain in self._pendingPartialRequests
					 * for re-use with the next request.
					 */
					if ( &#039;abort&#039; === statusText ) {
						return;
					}

					_.each( self._pendingPartialRequests, function( pending, partialId ) {
						pending.deferred.rejectWith( pending.partial, [ data, partialsPlacements[ partialId ] ] );
					} );
					self._pendingPartialRequests = {};
				} );
			},
			api.settings.timeouts.selectiveRefresh
		);

		return partialRequest.deferred.promise();
	};

	/**
	 * Add partials for any nav menu container elements in the document.
	 *
	 * This method may be called multiple times. Containers that already have been
	 * seen will be skipped.
	 *
	 * @since 4.5.0
	 *
	 * @param {jQuery|HTMLElement} [rootElement]
	 * @param {object}             [options]
	 * @param {boolean=true}       [options.triggerRendered]
	 */
	self.addPartials = function( rootElement, options ) {
		var containerElements;
		if ( ! rootElement ) {
			rootElement = document.documentElement;
		}
		rootElement = $( rootElement );
		options = _.extend(
			{
				triggerRendered: true
			},
			options || {}
		);

		containerElements = rootElement.find( &#039;[data-customize-partial-id]&#039; );
		if ( rootElement.is( &#039;[data-customize-partial-id]&#039; ) ) {
			containerElements = containerElements.add( rootElement );
		}
		containerElements.each( function() {
			var containerElement = $( this ), partial, placement, id, Constructor, partialOptions, containerContext;
			id = containerElement.data( &#039;customize-partial-id&#039; );
			if ( ! id ) {
				return;
			}
			containerContext = containerElement.data( &#039;customize-partial-placement-context&#039; ) || {};

			partial = self.partial( id );
			if ( ! partial ) {
				partialOptions = containerElement.data( &#039;customize-partial-options&#039; ) || {};
				partialOptions.constructingContainerContext = containerElement.data( &#039;customize-partial-placement-context&#039; ) || {};
				Constructor = self.partialConstructor[ containerElement.data( &#039;customize-partial-type&#039; ) ] || self.Partial;
				partial = new Constructor( id, partialOptions );
				self.partial.add( partial );
			}

			/*
			 * Only trigger renders on (nested) partials that have been not been
			 * handled yet. An example where this would apply is a nav menu
			 * embedded inside of a navigation menu widget. When the widget&#039;s title
			 * is updated, the entire widget will re-render and then the event
			 * will be triggered for the nested nav menu to do any initialization.
			 */
			if ( options.triggerRendered &amp;&amp; ! containerElement.data( &#039;customize-partial-content-rendered&#039; ) ) {

				placement = new Placement( {
					partial: partial,
					context: containerContext,
					container: containerElement
				} );

				$( placement.container ).attr( &#039;title&#039;, self.data.l10n.shiftClickToEdit );
				partial.createEditShortcutForPlacement( placement );

				/**
				 * Announce when a partial&#039;s nested placement has been re-rendered.
				 */
				self.trigger( &#039;partial-content-rendered&#039;, placement );
			}
			containerElement.data( &#039;customize-partial-content-rendered&#039;, true );
		} );
	};

	api.bind( &#039;preview-ready&#039;, function() {
		var handleSettingChange, watchSettingChange, unwatchSettingChange;

		_.extend( self.data, _customizePartialRefreshExports );

		// Create the partial JS models.
		_.each( self.data.partials, function( data, id ) {
			var Constructor, partial = self.partial( id );
			if ( ! partial ) {
				Constructor = self.partialConstructor[ data.type ] || self.Partial;
				partial = new Constructor(
					id,
					_.extend( { params: data }, data ) // Inclusion of params alias is for back-compat for custom partials that expect to augment this property.
				);
				self.partial.add( partial );
			} else {
				_.extend( partial.params, data );
			}
		} );

		/**
		 * Handle change to a setting.
		 *
		 * Note this is largely needed because adding a &#039;change&#039; event handler to wp.customize
		 * will only include the changed setting object as an argument, not including the
		 * new value or the old value.
		 *
		 * @since 4.5.0
		 * @this {wp.customize.Setting}
		 *
		 * @param {*|null} newValue New value, or null if the setting was just removed.
		 * @param {*|null} oldValue Old value, or null if the setting was just added.
		 */
		handleSettingChange = function( newValue, oldValue ) {
			var setting = this;
			self.partial.each( function( partial ) {
				if ( partial.isRelatedSetting( setting, newValue, oldValue ) ) {
					partial.refresh();
				}
			} );
		};

		/**
		 * Trigger the initial change for the added setting, and watch for changes.
		 *
		 * @since 4.5.0
		 * @this {wp.customize.Values}
		 *
		 * @param {wp.customize.Setting} setting
		 */
		watchSettingChange = function( setting ) {
			handleSettingChange.call( setting, setting(), null );
			setting.bind( handleSettingChange );
		};

		/**
		 * Trigger the final change for the removed setting, and unwatch for changes.
		 *
		 * @since 4.5.0
		 * @this {wp.customize.Values}
		 *
		 * @param {wp.customize.Setting} setting
		 */
		unwatchSettingChange = function( setting ) {
			handleSettingChange.call( setting, null, setting() );
			setting.unbind( handleSettingChange );
		};

		api.bind( &#039;add&#039;, watchSettingChange );
		api.bind( &#039;remove&#039;, unwatchSettingChange );
		api.each( function( setting ) {
			setting.bind( handleSettingChange );
		} );

		// Add (dynamic) initial partials that are declared via data-* attributes.
		self.addPartials( document.documentElement, {
			triggerRendered: false
		} );

		// Add new dynamic partials when the document changes.
		if ( &#039;undefined&#039; !== typeof MutationObserver ) {
			self.mutationObserver = new MutationObserver( function( mutations ) {
				_.each( mutations, function( mutation ) {
					self.addPartials( $( mutation.target ) );
				} );
			} );
			self.mutationObserver.observe( document.documentElement, {
				childList: true,
				subtree: true
			} );
		}

		/**
		 * Handle rendering of partials.
		 *
		 * @param {api.selectiveRefresh.Placement} placement
		 */
		api.selectiveRefresh.bind( &#039;partial-content-rendered&#039;, function( placement ) {
			if ( placement.container ) {
				self.addPartials( placement.container );
			}
		} );

		/**
		 * Handle setting validities in partial refresh response.
		 *
		 * @param {object} data Response data.
		 * @param {object} data.setting_validities Setting validities.
		 */
		api.selectiveRefresh.bind( &#039;render-partials-response&#039;, function handleSettingValiditiesResponse( data ) {
			if ( data.setting_validities ) {
				api.preview.send( &#039;selective-refresh-setting-validities&#039;, data.setting_validities );
			}
		} );

		api.preview.bind( &#039;edit-shortcut-visibility&#039;, function( visibility ) {
			api.selectiveRefresh.editShortcutVisibility.set( visibility );
		} );
		api.selectiveRefresh.editShortcutVisibility.bind( function( visibility ) {
			var body = $( document.body ), shouldAnimateHide;

			shouldAnimateHide = ( &#039;hidden&#039; === visibility &amp;&amp; body.hasClass( &#039;customize-partial-edit-shortcuts-shown&#039; ) &amp;&amp; ! body.hasClass( &#039;customize-partial-edit-shortcuts-hidden&#039; ) );
			body.toggleClass( &#039;customize-partial-edit-shortcuts-hidden&#039;, shouldAnimateHide );
			body.toggleClass( &#039;customize-partial-edit-shortcuts-shown&#039;, &#039;visible&#039; === visibility );
		} );

		api.preview.bind( &#039;active&#039;, function() {

			// Make all partials ready.
			self.partial.each( function( partial ) {
				partial.deferred.ready.resolve();
			} );

			// Make all partials added henceforth as ready upon add.
			self.partial.bind( &#039;add&#039;, function( partial ) {
				partial.deferred.ready.resolve();
			} );
		} );

	} );

	return self;
}( jQuery, wp.customize ) );
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