diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/js/customize-base.js
--- a/wp/wp-includes/js/customize-base.js	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-includes/js/customize-base.js	Mon Oct 14 17:39:30 2019 +0200
@@ -1,3 +1,4 @@
+/** @namespace wp */
 window.wp = window.wp || {};
 
 (function( exports, $ ){
@@ -74,6 +75,14 @@
 		}
 
 		magic = this;
+
+		/*
+		 * If the class has a method called "instance",
+		 * the return value from the class' constructor will be a function that
+		 * calls the "instance" method.
+		 *
+		 * It is also an object that has properties and methods inside it.
+		 */
 		if ( this.instance ) {
 			magic = function() {
 				return magic.instance.apply( magic, arguments );
@@ -101,6 +110,11 @@
 
 	api.Class.applicator = {};
 
+	/**
+	 * Initialize a class instance.
+	 *
+	 * Override this function in a subclass as needed.
+	 */
 	api.Class.prototype.initialize = function() {};
 
 	/*
@@ -152,9 +166,16 @@
 	/**
 	 * Observable values that support two-way binding.
 	 *
-	 * @constuctor
+	 * @memberOf wp.customize
+	 * @alias wp.customize.Value
+	 *
+	 * @constructor
 	 */
-	api.Value = api.Class.extend({
+	api.Value = api.Class.extend(/** @lends wp.customize.Value.prototype */{
+		/**
+		 * @param {mixed}  initial The initial value.
+		 * @param {object} options
+		 */
 		initialize: function( initial, options ) {
 			this._value = initial; // @todo: potentially change this to a this.set() call.
 			this.callbacks = $.Callbacks();
@@ -173,10 +194,20 @@
 			return arguments.length ? this.set.apply( this, arguments ) : this.get();
 		},
 
+		/**
+		 * Get the value.
+		 *
+		 * @return {mixed}
+		 */
 		get: function() {
 			return this._value;
 		},
 
+		/**
+		 * Set the value and trigger all bound callbacks.
+		 *
+		 * @param {object} to New value.
+		 */
 		set: function( to ) {
 			var from = this._value;
 
@@ -219,11 +250,21 @@
 			return value;
 		},
 
+		/**
+		 * Bind a function to be invoked whenever the value changes.
+		 *
+		 * @param {...Function} A function, or multiple functions, to add to the callback stack.
+		 */
 		bind: function() {
 			this.callbacks.add.apply( this.callbacks, arguments );
 			return this;
 		},
 
+		/**
+		 * Unbind a previously bound function.
+		 *
+		 * @param {...Function} A function, or multiple functions, to remove from the callback stack.
+		 */
 		unbind: function() {
 			this.callbacks.remove.apply( this.callbacks, arguments );
 			return this;
@@ -267,11 +308,20 @@
 	/**
 	 * A collection of observable values.
 	 *
-	 * @constuctor
+	 * @memberOf wp.customize
+	 * @alias wp.customize.Values
+	 *
+	 * @constructor
 	 * @augments wp.customize.Class
 	 * @mixes wp.customize.Events
 	 */
-	api.Values = api.Class.extend({
+	api.Values = api.Class.extend(/** @lends wp.customize.Values.prototype */{
+
+		/**
+		 * The default constructor for items of the collection.
+		 *
+		 * @type {object}
+		 */
 		defaultConstructor: api.Value,
 
 		initialize: function( options ) {
@@ -281,6 +331,21 @@
 			this._deferreds = {};
 		},
 
+		/**
+		 * Get the instance of an item from the collection if only ID is specified.
+		 *
+		 * If more than one argument is supplied, all are expected to be IDs and
+		 * the last to be a function callback that will be invoked when the requested
+		 * items are available.
+		 *
+		 * @see {api.Values.when}
+		 *
+		 * @param  {string}   id ID of the item.
+		 * @param  {...}         Zero or more IDs of items to wait for and a callback
+		 *                       function to invoke when they're available. Optional.
+		 * @return {mixed}    The item instance if only one ID was supplied.
+		 *                    A Deferred Promise object if a callback function is supplied.
+		 */
 		instance: function( id ) {
 			if ( arguments.length === 1 )
 				return this.value( id );
@@ -288,35 +353,87 @@
 			return this.when.apply( this, arguments );
 		},
 
+		/**
+		 * Get the instance of an item.
+		 *
+		 * @param  {string} id The ID of the item.
+		 * @return {[type]}    [description]
+		 */
 		value: function( id ) {
 			return this._value[ id ];
 		},
 
+		/**
+		 * Whether the collection has an item with the given ID.
+		 *
+		 * @param  {string}  id The ID of the item to look for.
+		 * @return {Boolean}
+		 */
 		has: function( id ) {
 			return typeof this._value[ id ] !== 'undefined';
 		},
 
-		add: function( id, value ) {
-			if ( this.has( id ) )
-				return this.value( id );
+		/**
+		 * Add an item to the collection.
+		 *
+		 * @param {string|wp.customize.Class} item - The item instance to add, or the ID for the instance to add. When an ID string is supplied, then itemObject must be provided.
+		 * @param {wp.customize.Class}        [itemObject] - The item instance when the first argument is a ID string.
+		 * @return {wp.customize.Class} The new item's instance, or an existing instance if already added.
+		 */
+		add: function( item, itemObject ) {
+			var collection = this, id, instance;
+			if ( 'string' === typeof item ) {
+				id = item;
+				instance = itemObject;
+			} else {
+				if ( 'string' !== typeof item.id ) {
+					throw new Error( 'Unknown key' );
+				}
+				id = item.id;
+				instance = item;
+			}
 
-			this._value[ id ] = value;
-			value.parent = this;
-			if ( value.extended( api.Value ) )
-				value.bind( this._change );
+			if ( collection.has( id ) ) {
+				return collection.value( id );
+			}
+
+			collection._value[ id ] = instance;
+			instance.parent = collection;
 
-			this.trigger( 'add', value );
+			// Propagate a 'change' event on an item up to the collection.
+			if ( instance.extended( api.Value ) ) {
+				instance.bind( collection._change );
+			}
+
+			collection.trigger( 'add', instance );
 
-			if ( this._deferreds[ id ] )
-				this._deferreds[ id ].resolve();
+			// If a deferred object exists for this item,
+			// resolve it.
+			if ( collection._deferreds[ id ] ) {
+				collection._deferreds[ id ].resolve();
+			}
 
-			return this._value[ id ];
+			return collection._value[ id ];
 		},
 
+		/**
+		 * Create a new item of the collection using the collection's default constructor
+		 * and store it in the collection.
+		 *
+		 * @param  {string} id    The ID of the item.
+		 * @param  {mixed}  value Any extra arguments are passed into the item's initialize method.
+		 * @return {mixed}  The new item's instance.
+		 */
 		create: function( id ) {
 			return this.add( id, new this.defaultConstructor( api.Class.applicator, slice.call( arguments, 1 ) ) );
 		},
 
+		/**
+		 * Iterate over all items in the collection invoking the provided callback.
+		 *
+		 * @param  {Function} callback Function to invoke.
+		 * @param  {object}   context  Object context to invoke the function with. Optional.
+		 */
 		each: function( callback, context ) {
 			context = typeof context === 'undefined' ? this : context;
 
@@ -325,19 +442,32 @@
 			});
 		},
 
+		/**
+		 * Remove an item from the collection.
+		 *
+		 * @param  {string} id The ID of the item to remove.
+		 */
 		remove: function( id ) {
-			var value;
+			var value = this.value( id );
 
-			if ( this.has( id ) ) {
-				value = this.value( id );
+			if ( value ) {
+
+				// Trigger event right before the element is removed from the collection.
 				this.trigger( 'remove', value );
-				if ( value.extended( api.Value ) )
+
+				if ( value.extended( api.Value ) ) {
 					value.unbind( this._change );
+				}
 				delete value.parent;
 			}
 
 			delete this._value[ id ];
 			delete this._deferreds[ id ];
+
+			// Trigger removed event after the item has been eliminated from the collection.
+			if ( value ) {
+				this.trigger( 'removed', value );
+			}
 		},
 
 		/**
@@ -359,10 +489,18 @@
 			if ( $.isFunction( ids[ ids.length - 1 ] ) )
 				dfd.done( ids.pop() );
 
+			/*
+			 * Create a stack of deferred objects for each item that is not
+			 * yet available, and invoke the supplied callback when they are.
+			 */
 			$.when.apply( $, $.map( ids, function( id ) {
 				if ( self.has( id ) )
 					return;
 
+				/*
+				 * The requested item is not available yet, create a deferred
+				 * object to resolve when it becomes available.
+				 */
 				return self._deferreds[ id ] = self._deferreds[ id ] || $.Deferred();
 			})).done( function() {
 				var values = $.map( ids, function( id ) {
@@ -385,11 +523,16 @@
 			return dfd.promise();
 		},
 
+		/**
+		 * A helper function to propagate a 'change' event from an item
+		 * to the collection itself.
+		 */
 		_change: function() {
 			this.parent.trigger( 'change', this );
 		}
 	});
 
+	// Create a global events bus on the Customizer.
 	$.extend( api.Values.prototype, api.Events );
 
 
@@ -407,11 +550,14 @@
 	 *
 	 * Handles inputs, selects, and textareas by default.
 	 *
-	 * @constuctor
+	 * @memberOf wp.customize
+	 * @alias wp.customize.Element
+	 *
+	 * @constructor
 	 * @augments wp.customize.Value
 	 * @augments wp.customize.Class
 	 */
-	api.Element = api.Value.extend({
+	api.Element = api.Value.extend(/** @lends wp.customize.Element */{
 		initialize: function( element, options ) {
 			var self = this,
 				synchronizer = api.Element.synchronizer.html,
@@ -420,34 +566,26 @@
 			this.element = api.ensure( element );
 			this.events = '';
 
-			if ( this.element.is('input, select, textarea') ) {
-				this.events += 'change';
+			if ( this.element.is( 'input, select, textarea' ) ) {
+				type = this.element.prop( 'type' );
+				this.events += ' change input';
 				synchronizer = api.Element.synchronizer.val;
 
-				if ( this.element.is('input') ) {
-					type = this.element.prop('type');
-					if ( api.Element.synchronizer[ type ] ) {
-						synchronizer = api.Element.synchronizer[ type ];
-					}
-					if ( 'text' === type || 'password' === type ) {
-						this.events += ' keyup';
-					} else if ( 'range' === type ) {
-						this.events += ' input propertychange';
-					}
-				} else if ( this.element.is('textarea') ) {
-					this.events += ' keyup';
+				if ( this.element.is( 'input' ) && api.Element.synchronizer[ type ] ) {
+					synchronizer = api.Element.synchronizer[ type ];
 				}
 			}
 
 			api.Value.prototype.initialize.call( this, null, $.extend( options || {}, synchronizer ) );
 			this._value = this.get();
 
-			update  = this.update;
+			update = this.update;
 			refresh = this.refresh;
 
 			this.update = function( to ) {
-				if ( to !== refresh.call( self ) )
+				if ( to !== refresh.call( self ) ) {
 					update.apply( this, arguments );
+				}
 			};
 			this.refresh = function() {
 				self.set( refresh.call( self ) );
@@ -502,13 +640,16 @@
 	$.support.postMessage = !! window.postMessage;
 
 	/**
-	 * Messenger for postMessage.
+	 * A communicator for sending data from one window to another over postMessage.
 	 *
-	 * @constuctor
+	 * @memberOf wp.customize
+	 * @alias wp.customize.Messenger
+	 *
+	 * @constructor
 	 * @augments wp.customize.Class
 	 * @mixes wp.customize.Events
 	 */
-	api.Messenger = api.Class.extend({
+	api.Messenger = api.Class.extend(/** @lends wp.customize.Messenger.prototype */{
 		/**
 		 * Create a new Value.
 		 *
@@ -524,22 +665,25 @@
 		/**
 		 * Initialize Messenger.
 		 *
-		 * @param  {object} params        Parameters to configure the messenger.
-		 *         {string} .url          The URL to communicate with.
-		 *         {window} .targetWindow The window instance to communicate with. Default window.parent.
-		 *         {string} .channel      If provided, will send the channel with each message and only accept messages a matching channel.
-		 * @param  {object} options       Extend any instance parameter or method with this object.
+		 * @param  {object} params - Parameters to configure the messenger.
+		 *         {string} params.url - The URL to communicate with.
+		 *         {window} params.targetWindow - The window instance to communicate with. Default window.parent.
+		 *         {string} params.channel - If provided, will send the channel with each message and only accept messages a matching channel.
+		 * @param  {object} options - Extend any instance parameter or method with this object.
 		 */
 		initialize: function( params, options ) {
 			// Target the parent frame by default, but only if a parent frame exists.
-			var defaultTarget = window.parent == window ? null : window.parent;
+			var defaultTarget = window.parent === window ? null : window.parent;
 
 			$.extend( this, options || {} );
 
 			this.add( 'channel', params.channel );
 			this.add( 'url', params.url || '' );
 			this.add( 'origin', this.url() ).link( this.url ).setter( function( to ) {
-				return to.replace( /([^:]+:\/\/[^\/]+).*/, '$1' );
+				var urlParser = document.createElement( 'a' );
+				urlParser.href = to;
+				// Port stripping needed by IE since it adds to host but not to event.origin.
+				return urlParser.protocol + '//' + urlParser.host.replace( /:(80|443)$/, '' );
 			});
 
 			// first add with no value
@@ -581,13 +725,19 @@
 			$( window ).off( 'message', this.receive );
 		},
 
+		/**
+		 * Receive data from the other window.
+		 *
+		 * @param  {jQuery.Event} event Event with embedded data.
+		 */
 		receive: function( event ) {
 			var message;
 
 			event = event.originalEvent;
 
-			if ( ! this.targetWindow() )
+			if ( ! this.targetWindow || ! this.targetWindow() ) {
 				return;
+			}
 
 			// Check to make sure the origin is valid.
 			if ( this.origin() && event.origin !== this.origin() )
@@ -611,6 +761,12 @@
 			this.trigger( message.id, message.data );
 		},
 
+		/**
+		 * Send data to the other window.
+		 *
+		 * @param  {string} id   The event name.
+		 * @param  {object} data Data.
+		 */
 		send: function( id, data ) {
 			var message;
 
@@ -630,8 +786,132 @@
 	// Add the Events mixin to api.Messenger.
 	$.extend( api.Messenger.prototype, api.Events );
 
-	// Core customize object.
+	/**
+	 * Notification.
+	 *
+	 * @class
+	 * @augments wp.customize.Class
+	 * @since 4.6.0
+	 *
+	 * @memberOf wp.customize
+	 * @alias wp.customize.Notification
+	 *
+	 * @param {string}  code - The error code.
+	 * @param {object}  params - Params.
+	 * @param {string}  params.message=null - The error message.
+	 * @param {string}  [params.type=error] - The notification type.
+	 * @param {boolean} [params.fromServer=false] - Whether the notification was server-sent.
+	 * @param {string}  [params.setting=null] - The setting ID that the notification is related to.
+	 * @param {*}       [params.data=null] - Any additional data.
+	 */
+	api.Notification = api.Class.extend(/** @lends wp.customize.Notification.prototype */{
+
+		/**
+		 * Template function for rendering the notification.
+		 *
+		 * This will be populated with template option or else it will be populated with template from the ID.
+		 *
+		 * @since 4.9.0
+		 * @var {Function}
+		 */
+		template: null,
+
+		/**
+		 * ID for the template to render the notification.
+		 *
+		 * @since 4.9.0
+		 * @var {string}
+		 */
+		templateId: 'customize-notification',
+
+		/**
+		 * Additional class names to add to the notification container.
+		 *
+		 * @since 4.9.0
+		 * @var {string}
+		 */
+		containerClasses: '',
+
+		/**
+		 * Initialize notification.
+		 *
+		 * @since 4.9.0
+		 *
+		 * @param {string}   code - Notification code.
+		 * @param {object}   params - Notification parameters.
+		 * @param {string}   params.message - Message.
+		 * @param {string}   [params.type=error] - Type.
+		 * @param {string}   [params.setting] - Related setting ID.
+		 * @param {Function} [params.template] - Function for rendering template. If not provided, this will come from templateId.
+		 * @param {string}   [params.templateId] - ID for template to render the notification.
+		 * @param {string}   [params.containerClasses] - Additional class names to add to the notification container.
+		 * @param {boolean}  [params.dismissible] - Whether the notification can be dismissed.
+		 */
+		initialize: function( code, params ) {
+			var _params;
+			this.code = code;
+			_params = _.extend(
+				{
+					message: null,
+					type: 'error',
+					fromServer: false,
+					data: null,
+					setting: null,
+					template: null,
+					dismissible: false,
+					containerClasses: ''
+				},
+				params
+			);
+			delete _params.code;
+			_.extend( this, _params );
+		},
+
+		/**
+		 * Render the notification.
+		 *
+		 * @since 4.9.0
+		 *
+		 * @returns {jQuery} Notification container element.
+		 */
+		render: function() {
+			var notification = this, container, data;
+			if ( ! notification.template ) {
+				notification.template = wp.template( notification.templateId );
+			}
+			data = _.extend( {}, notification, {
+				alt: notification.parent && notification.parent.alt
+			} );
+			container = $( notification.template( data ) );
+
+			if ( notification.dismissible ) {
+				container.find( '.notice-dismiss' ).on( 'click keydown', function( event ) {
+					if ( 'keydown' === event.type && 13 !== event.which ) {
+						return;
+					}
+
+					if ( notification.parent ) {
+						notification.parent.remove( notification.code );
+					} else {
+						container.remove();
+					}
+				});
+			}
+
+			return container;
+		}
+	});
+
+	// The main API object is also a collection of all customizer settings.
 	api = $.extend( new api.Values(), api );
+
+	/**
+	 * Get all customize settings.
+	 *
+	 * @memberOf wp.customize
+	 *
+	 * @return {object}
+	 */
 	api.get = function() {
 		var result = {};
 
@@ -642,6 +922,47 @@
 		return result;
 	};
 
-	// Expose the API publicly on window.wp.customize
+	/**
+	 * Utility function namespace
+	 *
+	 * @namespace wp.customize.utils
+	 */
+	api.utils = {};
+
+	/**
+	 * Parse query string.
+	 *
+	 * @since 4.7.0
+	 * @access public
+	 * @memberOf wp.customize.utils
+	 *
+	 * @param {string} queryString Query string.
+	 * @returns {object} Parsed query string.
+	 */
+	api.utils.parseQueryString = function parseQueryString( queryString ) {
+		var queryParams = {};
+		_.each( queryString.split( '&' ), function( pair ) {
+			var parts, key, value;
+			parts = pair.split( '=', 2 );
+			if ( ! parts[0] ) {
+				return;
+			}
+			key = decodeURIComponent( parts[0].replace( /\+/g, ' ' ) );
+			key = key.replace( / /g, '_' ); // What PHP does.
+			if ( _.isUndefined( parts[1] ) ) {
+				value = null;
+			} else {
+				value = decodeURIComponent( parts[1].replace( /\+/g, ' ' ) );
+			}
+			queryParams[ key ] = value;
+		} );
+		return queryParams;
+	};
+
+	/**
+	 * Expose the API publicly on window.wp.customize
+	 *
+	 * @namespace wp.customize
+	 */
 	exports.customize = api;
 })( wp, jQuery );