Misc: Drop support for older browsers; update support comments

That includes IE<8, Opera 12.x, Firefox<29, Safari<6.0 and some hacks
for old Blackberry.

Fixes jquerygh-1835
Fixes jquerygh-1701
Refs jquerygh-1815
Refs jquerygh-1820

README.md

@@ -14,7 +14,7 @@ In the spirit of open source software development, jQuery always encourages comm
 Environments in which to use jQuery
 --------------------------------------
 
-- [Browser support](http://jquery.com/browser-support/) differs between the master branch and the compat branch. Specifically, the master branch does not support legacy browsers such as IE6-8. The jQuery team continues to provide support for legacy browsers on the compat branch. Use the latest compat release if support for those browsers is required. See [browser support](http://jquery.com/browser-support/) for more info.
+- [Browser support](http://jquery.com/browser-support/) differs between the master branch and the compat branch. Specifically, the master branch does not support legacy browsers such as IE8. The jQuery team continues to provide support for legacy browsers on the compat branch. Use the latest compat release if support for those browsers is required. See [browser support](http://jquery.com/browser-support/) for more info.
 - To use jQuery in Node, browser extensions, and other non-browser environments, use only master branch releases given the name "jquery" rather than "jquery-compat". The compat branch does not support these environments.
 
 

src/ajax.js

@@ -44,7 +44,7 @@ var
 	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
 	allTypes = "*/".concat("*");
 
-// Support: IE<8
+// Support: IE8
 // #8138, IE may throw an exception when accessing
 // a field from window.location if document.domain has been set
 try {
@@ -509,7 +509,7 @@ jQuery.extend({
 		jqXHR.error = jqXHR.fail;
 
 		// Remove hash character (#7531: and string promotion)
-		// Add protocol if not provided (#5866: IE7 issue with protocol-less urls)
+		// Add protocol if not provided (prefilters might expect it)
 		// Handle falsy url in the settings object (#10093: consistency with old signature)
 		// We also use the url parameter if available
 		s.url = ( ( url || s.url || ajaxLocation ) + "" )

src/ajax/script.js

@@ -77,9 +77,7 @@ jQuery.ajaxTransport( "script", function(s) {
 					}
 				};
 
-				// Circumvent IE6 bugs with base elements (#2709 and #4378) by prepending
-				// Use native DOM manipulation to avoid our domManip AJAX trickery
-				head.insertBefore( script, head.firstChild );
+				head.appendChild( script );
 			},
 
 			abort: function() {

src/ajax/xhr.js

@@ -7,13 +7,13 @@ define([
 // Create the request object
 // (This is still attached to ajaxSettings for backward compatibility)
 jQuery.ajaxSettings.xhr = window.ActiveXObject !== undefined ?
-	// Support: IE6+
+	// Support: IE8
 	function() {
 
 		// XHR cannot access local files, always use ActiveX for that case
 		return !this.isLocal &&
 
-			// Support: IE7-8
+			// Support: IE8
 			// oldIE XHR does not support non-RFC2616 methods (#13240)
 			// See http://msdn.microsoft.com/en-us/library/ie/ms536648(v=vs.85).aspx
 			// and http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9
@@ -167,10 +167,6 @@ if ( xhrSupported ) {
 					if ( !options.async ) {
 						// if we're in sync mode we fire the callback
 						callback();
-					} else if ( xhr.readyState === 4 ) {
-						// (IE6 & IE7) if it's in cache and has been
-						// retrieved directly we need to fire the callback
-						setTimeout( callback );
 					} else {
 						// Add to the list of active xhr callbacks
 						xhr.onreadystatechange = xhrCallbacks[ id ] = callback;

src/attributes/attr.js

@@ -10,7 +10,6 @@ define([
 var nodeHook, boolHook,
 	attrHandle = jQuery.expr.attrHandle,
 	ruseDefault = /^(?:checked|selected)$/i,
-	getSetAttribute = support.getSetAttribute,
 	getSetInput = support.input;
 
 jQuery.fn.extend({
@@ -88,21 +87,17 @@ jQuery.extend({
 				// Boolean attributes get special treatment (#10870)
 				if ( jQuery.expr.match.bool.test( name ) ) {
 					// Set corresponding property to false
-					if ( getSetInput && getSetAttribute || !ruseDefault.test( name ) ) {
+					if ( getSetInput || !ruseDefault.test( name ) ) {
 						elem[ propName ] = false;
 					// Support: IE<9
 					// Also clear defaultChecked/defaultSelected (if appropriate)
 					} else {
 						elem[ jQuery.camelCase( "default-" + name ) ] =
 							elem[ propName ] = false;
 					}
-
-				// See #9699 for explanation of this approach (setting first, then removal)
-				} else {
-					jQuery.attr( elem, name, "" );
 				}
 
-				elem.removeAttribute( getSetAttribute ? name : propName );
+				elem.removeAttribute( name );
 			}
 		}
 	},
@@ -111,7 +106,7 @@ jQuery.extend({
 		type: {
 			set: function( elem, value ) {
 				if ( !support.radioValue && value === "radio" && jQuery.nodeName(elem, "input") ) {
-					// Setting the type on a radio button after the value resets the value in IE6-9
+					// Setting the type on a radio button after the value resets the value in IE8-9
 					// Reset value to default in case type is set after value during creation
 					var val = elem.value;
 					elem.setAttribute( "type", value );
@@ -131,12 +126,11 @@ boolHook = {
 		if ( value === false ) {
 			// Remove boolean attributes when set to false
 			jQuery.removeAttr( elem, name );
-		} else if ( getSetInput && getSetAttribute || !ruseDefault.test( name ) ) {
-			// IE<8 needs the *property* name
-			elem.setAttribute( !getSetAttribute && jQuery.propFix[ name ] || name, name );
+		} else if ( getSetInput || !ruseDefault.test( name ) ) {
+			elem.setAttribute( jQuery.propFix[ name ] || name, name );
 
-		// Use defaultChecked and defaultSelected for oldIE
 		} else {
+			// Use defaultChecked and defaultSelected for oldIE
 			elem[ jQuery.camelCase( "default-" + name ) ] = elem[ name ] = true;
 		}
 
@@ -149,7 +143,7 @@ jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name )
 
 	var getter = attrHandle[ name ] || jQuery.find.attr;
 
-	attrHandle[ name ] = getSetInput && getSetAttribute || !ruseDefault.test( name ) ?
+	attrHandle[ name ] = getSetInput || !ruseDefault.test( name ) ?
 		function( elem, name, isXML ) {
 			var ret, handle;
 			if ( !isXML ) {
@@ -173,7 +167,7 @@ jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name )
 });
 
 // fix oldIE attroperties
-if ( !getSetInput || !getSetAttribute ) {
+if ( !getSetInput ) {
 	jQuery.attrHooks.value = {
 		set: function( elem, value, name ) {
 			if ( jQuery.nodeName( elem, "input" ) ) {
@@ -187,74 +181,6 @@ if ( !getSetInput || !getSetAttribute ) {
 	};
 }
 
-// IE6/7 do not support getting/setting some attributes with get/setAttribute
-if ( !getSetAttribute ) {
-
-	// Use this for any attribute in IE6/7
-	// This fixes almost every IE6/7 issue
-	nodeHook = {
-		set: function( elem, value, name ) {
-			// Set the existing or create a new attribute node
-			var ret = elem.getAttributeNode( name );
-			if ( !ret ) {
-				elem.setAttributeNode(
-					(ret = elem.ownerDocument.createAttribute( name ))
-				);
-			}
-
-			ret.value = value += "";
-
-			// Break association with cloned elements by also using setAttribute (#9646)
-			if ( name === "value" || value === elem.getAttribute( name ) ) {
-				return value;
-			}
-		}
-	};
-
-	// Some attributes are constructed with empty-string values when not defined
-	attrHandle.id = attrHandle.name = attrHandle.coords =
-		function( elem, name, isXML ) {
-			var ret;
-			if ( !isXML ) {
-				return (ret = elem.getAttributeNode( name )) && ret.value !== "" ?
-					ret.value :
-					null;
-			}
-		};
-
-	// Fixing value retrieval on a button requires this module
-	jQuery.valHooks.button = {
-		get: function( elem, name ) {
-			var ret = elem.getAttributeNode( name );
-			if ( ret && ret.specified ) {
-				return ret.value;
-			}
-		},
-		set: nodeHook.set
-	};
-
-	// Set contenteditable to false on removals(#10429)
-	// Setting to empty string throws an error as an invalid value
-	jQuery.attrHooks.contenteditable = {
-		set: function( elem, value, name ) {
-			nodeHook.set( elem, value === "" ? false : value, name );
-		}
-	};
-
-	// Set width and height to auto instead of 0 on empty string( Bug #8150 )
-	// This is for removals
-	jQuery.each([ "width", "height" ], function( i, name ) {
-		jQuery.attrHooks[ name ] = {
-			set: function( elem, value ) {
-				if ( value === "" ) {
-					elem.setAttribute( name, "auto" );
-					return value;
-				}
-			}
-		};
-	});
-}
-
 if ( !support.style ) {
 	jQuery.attrHooks.style = {
 		get: function( elem ) {

src/attributes/prop.js

@@ -80,19 +80,6 @@ jQuery.extend({
 	}
 });
 
-// Some attributes require a special call on IE
-// http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
-if ( !support.hrefNormalized ) {
-	// href/src property should get the full normalized URL (#10299/#12915)
-	jQuery.each([ "href", "src" ], function( i, name ) {
-		jQuery.propHooks[ name ] = {
-			get: function( elem ) {
-				return elem.getAttribute( name, 4 );
-			}
-		};
-	});
-}
-
 // Support: Safari, IE9+
 // mis-reports the default selected property of an option
 // Accessing the parent's selectedIndex property fixes it
@@ -129,9 +116,4 @@ jQuery.each([
 	jQuery.propFix[ this.toLowerCase() ] = this;
 });
 
-// IE6/7 call enctype encoding
-if ( !support.enctype ) {
-	jQuery.propFix.enctype = "encoding";
-}
-
 });

src/attributes/support.js

@@ -8,8 +8,7 @@ define([
 
 	// Setup
 	div = document.createElement( "div" );
-	div.setAttribute( "className", "t" );
-	div.innerHTML = "  <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";
+	div.innerHTML = "  <link/><a href='/a'>a</a><input type='checkbox'/>";
 	a = div.getElementsByTagName("a")[ 0 ];
 
 	// First batch of tests.
@@ -19,28 +18,17 @@ define([
 
 	a.style.cssText = "top:1px";
 
-	// Test setAttribute on camelCase class.
-	// If it works, we need attrFixes when doing get/setAttribute (ie6/7)
-	support.getSetAttribute = div.className !== "t";
-
 	// Get the style information from getAttribute
 	// (IE uses .cssText instead)
 	support.style = /top/.test( a.getAttribute("style") );
 
-	// Make sure that URLs aren't manipulated
-	// (IE normalizes it by default)
-	support.hrefNormalized = a.getAttribute("href") === "/a";
-
 	// Check the default checkbox/radio value ("" on WebKit; "on" elsewhere)
 	support.checkOn = !!input.value;
 
 	// Make sure that a selected-by-default option has a working selected property.
 	// (WebKit defaults to false instead of true, IE too, if it's in an optgroup)
 	support.optSelected = opt.selected;
 
-	// Tests for enctype support on a form (#6743)
-	support.enctype = !!document.createElement("form").enctype;
-
 	// Make sure that the options inside disabled selects aren't marked as disabled
 	// (WebKit marks them as disabled)
 	select.disabled = true;

src/attributes/val.js

@@ -129,24 +129,8 @@ jQuery.extend({
 
 				while ( i-- ) {
 					option = options[ i ];
-
-					if ( jQuery.inArray( jQuery.valHooks.option.get( option ), values ) >= 0 ) {
-
-						// Support: IE6
-						// When new option element is added to select box we need to
-						// force reflow of newly added node in order to workaround delay
-						// of initialization properties
-						try {
-							option.selected = optionSet = true;
-
-						} catch ( _ ) {
-
-							// Will be executed only in IE6
-							option.scrollHeight;
-						}
-
-					} else {
-						option.selected = false;
+					if ( (option.selected = jQuery.inArray( option.value, values ) >= 0) ) {
+						optionSet = true;
 					}
 				}
 
@@ -172,8 +156,6 @@ jQuery.each([ "radio", "checkbox" ], function() {
 	};
 	if ( !support.checkOn ) {
 		jQuery.valHooks[ this ].get = function( elem ) {
-			// Support: Webkit
-			// "" is returned instead of "on" if a value isn't specified
 			return elem.getAttribute("value") === null ? "on" : elem.value;
 		};
 	}

src/core.js

@@ -285,9 +285,7 @@ jQuery.extend({
 
 		script.text = data;
 
-		// Support: IE6
-		// Circumvent bugs with base elements (#2709 and #4378) by prepending
-		head.insertBefore( script, head.firstChild );
+		head.appendChild( script );
 		head.removeChild( script );
 	},
 

src/core/init.js

@@ -72,15 +72,7 @@ var rootjQuery,
 				} else {
 					elem = document.getElementById( match[2] );
 
-					// Check parentNode to catch when Blackberry 4.6 returns
-					// nodes that are no longer in the document #6963
-					if ( elem && elem.parentNode ) {
-						// Handle the case where IE and Opera return items
-						// by name instead of ID
-						if ( elem.id !== match[2] ) {
-							return rootjQuery.find( selector );
-						}
-
+					if ( elem ) {
 						// Otherwise, we inject the element directly into the jQuery object
 						this.length = 1;
 						this[0] = elem;

src/css.js

@@ -38,7 +38,7 @@ var
 		fontWeight: "400"
 	},
 
-	cssPrefixes = [ "Webkit", "O", "Moz", "ms" ];
+	cssPrefixes = [ "Webkit", "Moz", "ms" ];
 
 // BuildExclude
 curCSS = curCSS.curCSS;
@@ -174,8 +174,7 @@ function getWidthOrHeight( elem, name, extra ) {
 	var valueIsBorderBox = true,
 		val = name === "width" ? elem.offsetWidth : elem.offsetHeight,
 		styles = getStyles( elem ),
-		isBorderBox = support.boxSizing &&
-			jQuery.css( elem, "boxSizing", false, styles ) === "border-box";
+		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box";
 
 	// some non-html elements return undefined for offsetWidth, so check for null/undefined
 	// svg - https://bugzilla.mozilla.org/show_bug.cgi?id=649285
@@ -302,7 +301,7 @@ jQuery.extend({
 			if ( !hooks || !("set" in hooks) ||
 				(value = hooks.set( elem, value, extra )) !== undefined ) {
 
-				// Support: IE
+				// Support: IE8
 				// Swallow errors from 'invalid' CSS values (#5509)
 				try {
 					style[ name ] = value;
@@ -380,8 +379,7 @@ jQuery.each([ "height", "width" ], function( i, name ) {
 					elem,
 					name,
 					extra,
-					support.boxSizing &&
-						jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
+					jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
 					styles
 				) : 0
 			);
@@ -437,6 +435,7 @@ if ( !support.opacity ) {
 	};
 }
 
+// Support: Android 2.3
 jQuery.cssHooks.marginRight = addGetHookIf( support.reliableMarginRight,
 	function( elem, computed ) {
 		if ( computed ) {