No ticket: reduce support.js

src/support.js

-jQuery.support = (function() {
+jQuery.support = (function( support ) {
 
-	var support, all, a,
-		input, select, fragment,
-		opt, eventName, isSupported, i,
+	var all, a, input, select, fragment, opt, eventName, isSupported, i,
 		div = document.createElement("div");
 
 	// Setup
 	div.setAttribute( "className", "t" );
 	div.innerHTML = "  <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";
 
-	// Support tests won't run in some limited or non-browser environments
+	// Finish early in limited (non-browser) environments
 	all = div.getElementsByTagName("*");
 	a = div.getElementsByTagName("a")[ 0 ];
 	if ( !all || !a || !all.length ) {
-		return {};
+		return support;
 	}
 
 	// First batch of tests
@@ -22,64 +20,63 @@ jQuery.support = (function() {
 	input = div.getElementsByTagName("input")[ 0 ];
 
 	a.style.cssText = "top:1px;float:left;opacity:.5";
-	support = {
-		// Test setAttribute on camelCase class. If it works, we need attrFixes when doing get/setAttribute (ie6/7)
-		getSetAttribute: div.className !== "t",
 
-		// IE strips leading whitespace when .innerHTML is used
-		leadingWhitespace: div.firstChild.nodeType === 3,
+	// Test setAttribute on camelCase class. If it works, we need attrFixes when doing get/setAttribute (ie6/7)
+	support.getSetAttribute = div.className !== "t";
 
-		// Make sure that tbody elements aren't automatically inserted
-		// IE will insert them into empty tables
-		tbody: !div.getElementsByTagName("tbody").length,
+	// IE strips leading whitespace when .innerHTML is used
+	support.leadingWhitespace = div.firstChild.nodeType === 3;
 
-		// Make sure that link elements get serialized correctly by innerHTML
-		// This requires a wrapper element in IE
-		htmlSerialize: !!div.getElementsByTagName("link").length,
+	// Make sure that tbody elements aren't automatically inserted
+	// IE will insert them into empty tables
+	support.tbody = !div.getElementsByTagName("tbody").length;
 
-		// Get the style information from getAttribute
-		// (IE uses .cssText instead)
-		style: /top/.test( a.getAttribute("style") ),
+	// Make sure that link elements get serialized correctly by innerHTML
+	// This requires a wrapper element in IE
+	support.htmlSerialize = !!div.getElementsByTagName("link").length;
 
-		// Make sure that URLs aren't manipulated
-		// (IE normalizes it by default)
-		hrefNormalized: a.getAttribute("href") === "/a",
+	// Get the style information from getAttribute
+	// (IE uses .cssText instead)
+	support.style = /top/.test( a.getAttribute("style") );
 
-		// Make sure that element opacity exists
-		// (IE uses filter instead)
-		// Use a regex to work around a WebKit issue. See #5145
-		opacity: /^0.5/.test( a.style.opacity ),
+	// Make sure that URLs aren't manipulated
+	// (IE normalizes it by default)
+	support.hrefNormalized = a.getAttribute("href") === "/a";
 
-		// Verify style float existence
-		// (IE uses styleFloat instead of cssFloat)
-		cssFloat: !!a.style.cssFloat,
+	// Make sure that element opacity exists
+	// (IE uses filter instead)
+	// Use a regex to work around a WebKit issue. See #5145
+	support.opacity = /^0.5/.test( a.style.opacity );
 
-		// Check the default checkbox/radio value ("" on WebKit; "on" elsewhere)
-		checkOn: !!input.value,
+	// Verify style float existence
+	// (IE uses styleFloat instead of cssFloat)
+	support.cssFloat = !!a.style.cssFloat;
 
-		// 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)
-		optSelected: opt.selected,
+	// Check the default checkbox/radio value ("" on WebKit; "on" elsewhere)
+	support.checkOn = !!input.value;
 
-		// Tests for enctype support on a form (#6743)
-		enctype: !!document.createElement("form").enctype,
+	// 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;
 
-		// Makes sure cloning an html5 element does not cause problems
-		// Where outerHTML is undefined, this still works
-		html5Clone: document.createElement("nav").cloneNode( true ).outerHTML !== "<:nav></:nav>",
+	// Tests for enctype support on a form (#6743)
+	support.enctype = !!document.createElement("form").enctype;
 
-		// jQuery.support.boxModel DEPRECATED in 1.8 since we don't support Quirks Mode
-		boxModel: document.compatMode === "CSS1Compat",
+	// Makes sure cloning an html5 element does not cause problems
+	// Where outerHTML is undefined, this still works
+	support.html5Clone = document.createElement("nav").cloneNode( true ).outerHTML !== "<:nav></:nav>";
 
-		// Will be defined later
-		deleteExpando: true,
-		noCloneEvent: true,
-		inlineBlockNeedsLayout: false,
-		shrinkWrapBlocks: false,
-		reliableMarginRight: true,
-		boxSizingReliable: true,
-		pixelPosition: false
-	};
+	// jQuery.support.boxModel DEPRECATED in 1.8 since we don't support Quirks Mode
+	support.boxModel = document.compatMode === "CSS1Compat";
+
+	// Will be defined later
+	support.inlineBlockNeedsLayout = false;
+	support.shrinkWrapBlocks = false;
+	support.pixelPosition = false;
+	support.deleteExpando = true;
+	support.noCloneEvent = true;
+	support.reliableMarginRight = true;
+	support.boxSizingReliable = true;
 
 	// Make sure checked status is properly cloned
 	input.checked = true;
@@ -237,5 +234,5 @@ jQuery.support = (function() {
 	all = select = fragment = opt = a = input = null;
 
 	return support;
-})();
+})({});