Update jquery.uls from upstream

* Update linters

Updating to
d53beca719

Change-Id: Ia7886a13fc17e27344280449d0377e0fa5d0d9f5

lib/jquery.uls/src/jquery.uls.core.js

@@ -149,7 +149,7 @@
 			this.$menu.addClass( widthClasses[ this.menuWidth ] );
 
 			if ( !this.initialized ) {
-				$( 'body' ).prepend( this.$menu );
+				$( document.body ).prepend( this.$menu );
 				this.i18n();
 				this.initialized = true;
 			}
@@ -160,7 +160,7 @@
 			this.shown = true;
 
 			if ( !this.isMobile() ) {
-				this.$languageFilter.focus();
+				this.$languageFilter.trigger( 'focus' );
 			}
 
 			this.visible();
@@ -267,8 +267,8 @@
 
 			this.$languageFilter.on( 'resultsfound.uls', this.success.bind( this ) );
 
-			$( 'html' ).click( this.cancel.bind( this ) );
-			$( window ).resize( $.fn.uls.debounce( this.resize.bind( this ), 250 ) );
+			$( document.body ).on( 'click', this.cancel.bind( this ) );
+			$( window ).on( 'resize', $.fn.uls.debounce( this.resize.bind( this ), 250 ) );
 		},
 
 		resize: function () {
@@ -477,6 +477,7 @@
 				} else {
 					scrollPosition = panelBottom - windowHeight;
 				}
+				// eslint-disable-next-line no-jquery/no-global-selector
 				$( 'html, body' ).stop().animate( {
 					scrollTop: scrollPosition
 				}, 500 );

lib/jquery.uls/src/jquery.uls.languagefilter.js

@@ -103,7 +103,7 @@
 					e.preventDefault();
 					e.stopPropagation();
 
-					query = $.trim( this.$element.val() ).toLowerCase();
+					query = ( this.$element.val() || '' ).trim().toLowerCase();
 
 					if ( this.selectedLanguage ) {
 						// this.selectLanguage will be populated from a matching search
@@ -126,7 +126,7 @@
 			this.$element.val( '' );
 
 			if ( !$.fn.uls.Constructor.prototype.isMobile() ) {
-				this.$element.focus();
+				this.$element.trigger( 'focus' );
 			}
 
 			this.toggleClear();
@@ -160,7 +160,7 @@
 		search: function () {
 			var languages = Object.keys( this.options.languages ),
 				results = [],
-				query = $.trim( this.$element.val() ).toLowerCase();
+				query = ( this.$element.val() || '' ).trim().toLowerCase();
 
 			if ( query === '' ) {
 				this.options.lcd.setGroupByRegionOverride( null );
@@ -189,6 +189,7 @@
 				var autofillLabel,
 					results = [];
 
+				// eslint-disable-next-line no-jquery/no-each-util
 				$.each( result.languagesearch, function ( apiCode, name ) {
 					var code, redirect;
 

lib/jquery.uls/src/jquery.uls.lcd.js

@@ -57,7 +57,7 @@
 		this.$element.addClass( 'uls-lcd' );
 		this.regionLanguages = {};
 		this.renderTimeout = null;
-		this.cachedQuicklist = null;
+		this.$cachedQuicklist = null;
 		this.groupByRegionOverride = null;
 
 		this.render();
@@ -327,17 +327,17 @@
 		buildQuicklist: function () {
 			var quickList, $quickListSection, $quickListSectionTitle;
 
-			if ( this.cachedQuicklist !== null ) {
-				return this.cachedQuicklist;
+			if ( this.$cachedQuicklist !== null ) {
+				return this.$cachedQuicklist;
 			}
 
-			if ( $.isFunction( this.options.quickList ) ) {
+			if ( typeof this.options.quickList === 'function' ) {
 				this.options.quickList = this.options.quickList();
 			}
 
 			if ( !this.options.quickList.length ) {
-				this.cachedQuicklist = $( [] );
-				return this.cachedQuicklist;
+				this.$cachedQuicklist = $( [] );
+				return this.$cachedQuicklist;
 			}
 
 			// Pick only the first elements, because we don't have room for more
@@ -363,8 +363,8 @@
 
 			$quickListSectionTitle.i18n();
 
-			this.cachedQuicklist = $quickListSection;
-			return this.cachedQuicklist;
+			this.$cachedQuicklist = $quickListSection;
+			return this.$cachedQuicklist;
 		},
 
 		show: function () {
@@ -382,7 +382,7 @@
 		},
 
 		focus: function () {
-			this.$element.focus();
+			this.$element.trigger( 'focus' );
 		},
 
 		/**