All: Drop support for jQueries different than the latest for each major

Also, remove the ability to run the test suite in jQuery <1.12.4 & <2.2.4.

Closes gh-2249

6 files changed, 12 insertions, 70 deletions

diff --git a/ui/data.js b/ui/data.js
index 5a1c650d4..e37461ac7 100644
--- a/ui/data.js
+++ b/ui/data.js
@@ -28,16 +28,10 @@
 "use strict";
 
 return $.extend( $.expr.pseudos, {
-	data: $.expr.createPseudo ?
-		$.expr.createPseudo( function( dataName ) {
-			return function( elem ) {
-				return !!$.data( elem, dataName );
-			};
-		} ) :
-
-		// Support: jQuery <1.8
-		function( elem, i, match ) {
-			return !!$.data( elem, match[ 3 ] );
-		}
+	data: $.expr.createPseudo( function( dataName ) {
+		return function( elem ) {
+			return !!$.data( elem, dataName );
+		};
+	} )
 } );
 } );
diff --git a/ui/effect.js b/ui/effect.js
index 2232e041d..ac9b0c809 100644
--- a/ui/effect.js
+++ b/ui/effect.js
@@ -125,15 +125,6 @@ function styleDifference( oldStyle, newStyle ) {
 	return diff;
 }
 
-// Support: jQuery <1.8
-if ( !$.fn.addBack ) {
-	$.fn.addBack = function( selector ) {
-		return this.add( selector == null ?
-			this.prevObject : this.prevObject.filter( selector )
-		);
-	};
-}
-
 $.effects.animateClass = function( value, duration, easing, callback ) {
 	var o = $.speed( duration, easing, callback );
 
diff --git a/ui/jquery-patch.js b/ui/jquery-patch.js
index 07254d959..e03b32edf 100644
--- a/ui/jquery-patch.js
+++ b/ui/jquery-patch.js
@@ -27,18 +27,6 @@
 } )( function( $ ) {
 "use strict";
 
-// Support: jQuery 1.9.x or older
-// $.expr[ ":" ] is deprecated.
-if ( !$.expr.pseudos ) {
-	$.expr.pseudos = $.expr[ ":" ];
-}
-
-// Support: jQuery 1.11.x or older
-// $.unique has been renamed to $.uniqueSort
-if ( !$.uniqueSort ) {
-	$.uniqueSort = $.unique;
-}
-
 // Support: jQuery 2.2.x or older.
 // This method has been defined in jQuery 3.0.0.
 // Code from https://github.com/jquery/jquery/blob/e539bac79e666bba95bba86d690b4e609dca2286/src/selector/escapeSelector.js
diff --git a/ui/widgets/datepicker.js b/ui/widgets/datepicker.js
index a271351e0..605760572 100644
--- a/ui/widgets/datepicker.js
+++ b/ui/widgets/datepicker.js
@@ -910,11 +910,8 @@ $.extend( Datepicker.prototype, {
 		}
 	},
 
-	// #6694 - don't focus the input if it's already focused
-	// this breaks the change event in IE
-	// Support: IE and jQuery <1.9
 	_shouldFocusInput: function( inst ) {
-		return inst.input && inst.input.is( ":visible" ) && !inst.input.is( ":disabled" ) && !inst.input.is( ":focus" );
+		return inst.input && inst.input.is( ":visible" ) && !inst.input.is( ":disabled" );
 	},
 
 	/* Check positioning to remain on screen. */
@@ -971,8 +968,7 @@ $.extend( Datepicker.prototype, {
 				$.datepicker._tidyDialog( inst );
 			};
 
-			// DEPRECATED: after BC for 1.8.x $.effects[ showAnim ] is not needed
-			if ( $.effects && ( $.effects.effect[ showAnim ] || $.effects[ showAnim ] ) ) {
+			if ( $.effects && ( $.effects.effect[ showAnim ] ) ) {
 				inst.dpDiv.hide( showAnim, $.datepicker._get( inst, "showOptions" ), duration, postProcess );
 			} else {
 				inst.dpDiv[ ( showAnim === "slideDown" ? "slideUp" :
diff --git a/ui/widgets/dialog.js b/ui/widgets/dialog.js
index e04598dcc..cbda81636 100644
--- a/ui/widgets/dialog.js
+++ b/ui/widgets/dialog.js
@@ -857,8 +857,6 @@ $.widget( "ui.dialog", {
 			return;
 		}
 
-		var jqMinor = $.fn.jquery.substring( 0, 4 );
-
 		// We use a delay in case the overlay is created from an
 		// event that we're going to be cancelling (#2804)
 		var isOpening = true;
@@ -880,18 +878,6 @@ $.widget( "ui.dialog", {
 				if ( !instance._allowInteraction( event ) ) {
 					event.preventDefault();
 					instance._focusTabbable();
-
-					// Support: jQuery >=3.4 <3.7 only
-					// In jQuery 3.4-3.6, there are multiple issues with focus/blur
-					// trigger chains or when triggering is done on a hidden element
-					// at least once.
-					// Trigger focus in a delay in addition if needed to avoid the issues.
-					// See https://github.com/jquery/jquery/issues/4382
-					// See https://github.com/jquery/jquery/issues/4856
-					// See https://github.com/jquery/jquery/issues/4950
-					if ( jqMinor === "3.4." || jqMinor === "3.5." || jqMinor === "3.6." ) {
-						instance._delay( instance._restoreTabbableFocus );
-					}
 				}
 			}.bind( this ) );
 		}
diff --git a/ui/widgets/tabs.js b/ui/widgets/tabs.js
index be4fe7e7a..465b48cec 100644
--- a/ui/widgets/tabs.js
+++ b/ui/widgets/tabs.js
@@ -857,32 +857,19 @@ $.widget( "ui.tabs", {
 
 		this.xhr = $.ajax( this._ajaxSettings( anchor, event, eventData ) );
 
-		// Support: jQuery <1.8
-		// jQuery <1.8 returns false if the request is canceled in beforeSend,
-		// but as of 1.8, $.ajax() always returns a jqXHR object.
-		if ( this.xhr && this.xhr.statusText !== "canceled" ) {
+		if ( this.xhr.statusText !== "canceled" ) {
 			this._addClass( tab, "ui-tabs-loading" );
 			panel.attr( "aria-busy", "true" );
 
 			this.xhr
 				.done( function( response, status, jqXHR ) {
+					panel.html( response );
+					that._trigger( "load", event, eventData );
 
-					// support: jQuery <1.8
-					// https://bugs.jquery.com/ticket/11778
-					setTimeout( function() {
-						panel.html( response );
-						that._trigger( "load", event, eventData );
-
-						complete( jqXHR, status );
-					}, 1 );
+					complete( jqXHR, status );
 				} )
 				.fail( function( jqXHR, status ) {
-
-					// support: jQuery <1.8
-					// https://bugs.jquery.com/ticket/11778
-					setTimeout( function() {
-						complete( jqXHR, status );
-					}, 1 );
+					complete( jqXHR, status );
 				} );
 		}
 	},