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 gh-1836
Fixes gh-1701
Refs gh-1815
Refs gh-1820

src/attributes/attr.js

@@ -7,10 +7,9 @@ define([
 	"../selector"
 ], function( jQuery, rnotwhite, access, support ) {
 
-var nodeHook, boolHook,
+var boolHook,
 	attrHandle = jQuery.expr.attrHandle,
 	ruseDefault = /^(?:checked|selected)$/i,
-	getSetAttribute = support.getSetAttribute,
 	getSetInput = support.input;
 
 jQuery.fn.extend({
@@ -45,7 +44,7 @@ jQuery.extend({
 		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
 			name = name.toLowerCase();
 			hooks = jQuery.attrHooks[ name ] ||
-				( jQuery.expr.match.bool.test( name ) ? boolHook : nodeHook );
+				( jQuery.expr.match.bool.test( name ) ? boolHook : undefined );
 		}
 
 		if ( value !== undefined ) {
@@ -88,7 +87,7 @@ 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)
@@ -96,13 +95,9 @@ jQuery.extend({
 						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 +126,12 @@ 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 {
+			// Support: IE<9
+			// Use defaultChecked and defaultSelected for oldIE
 			elem[ jQuery.camelCase( "default-" + name ) ] = elem[ name ] = true;
 		}
 
@@ -149,7 +144,7 @@ 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 ) {
@@ -173,88 +168,17 @@ 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 ) {
+		set: function( elem, value ) {
 			if ( jQuery.nodeName( elem, "input" ) ) {
 				// Does not return so that setAttribute is also used
 				elem.defaultValue = value;
-			} else {
-				// Use nodeHook if defined (#1954); otherwise setAttribute is fine
-				return nodeHook && nodeHook.set( elem, value, name );
 			}
 		}
 	};
 }
 
-// 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

@@ -80,22 +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
 if ( !support.optSelected ) {
 	jQuery.propHooks.selected = {
 		get: function( elem ) {
@@ -129,9 +113,4 @@ 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 +18,18 @@ 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;
 
+	// Support: IE8-11+
 	// 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)
+	// (IE defaults to false instead of true 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

@@ -96,7 +96,8 @@ jQuery.extend({
 				for ( ; i < max; i++ ) {
 					option = options[ i ];
 
-					// oldIE doesn't update selected after form reset (#2551)
+					// Support: IE<10
+					// IE8-9 doesn't update selected after form reset (#2551)
 					if ( ( option.selected || i === index ) &&
 							// Don't return options that are disabled or in a disabled optgroup
 							( support.optDisabled ?
@@ -129,24 +130,9 @@ 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( jQuery.valHooks.option.get( option ), values ) >= 0) ) {
+						optionSet = true;
 					}
 				}
 
@@ -172,8 +158,6 @@ 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;
 		};
 	}