X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fsupport.js;h=cddd3dc3b962af886a59cf9d3c6468bfe66b787d;hb=8effe3a7dee91c833cc1774646da9d743600c64c;hp=332839df87f3560ccb4292fad17d3e9a21945160;hpb=5ac2e0837cd5c86acc526c5bc5c3abbe91303116;p=jquery.git

diff --git a/src/support.js b/src/support.js
index 332839d..cddd3dc 100644
--- a/src/support.js
+++ b/src/support.js
@@ -1,14 +1,14 @@
-(function(){
+(function() {
 
 	jQuery.support = {};
 
 	var root = document.documentElement,
 		script = document.createElement("script"),
 		div = document.createElement("div"),
-		id = "script" + (new Date).getTime();
+		id = "script" + jQuery.now();
 
 	div.style.display = "none";
-	div.innerHTML = '   <link/><table></table><a href="/a" style="color:red;float:left;opacity:.55;">a</a><select><option>text</option></select>';
+	div.innerHTML = "   <link/><table></table><a href='/a' style='color:red;float:left;opacity:.55;'>a</a><input type='checkbox'/>";
 
 	var all = div.getElementsByTagName("*"),
 		a = div.getElementsByTagName("a")[0];
@@ -20,7 +20,7 @@
 
 	jQuery.support = {
 		// IE strips leading whitespace when .innerHTML is used
-		leadingWhitespace: div.firstChild.nodeType == 3,
+		leadingWhitespace: div.firstChild.nodeType === 3,
 
 		// Make sure that tbody elements aren't automatically inserted
 		// IE will insert them into empty tables
@@ -40,13 +40,24 @@
 
 		// Make sure that element opacity exists
 		// (IE uses filter instead)
-		opacity: a.style.opacity === "0.55",
+		// Use a regex to work around a WebKit issue. See #5145
+		opacity: /^0.55$/.test( a.style.opacity ),
 
 		// Verify style float existence
 		// (IE uses styleFloat instead of cssFloat)
 		cssFloat: !!a.style.cssFloat,
 
+		// Make sure that if no value is specified for a checkbox
+		// that it defaults to "on".
+		// (WebKit defaults to "" instead)
+		checkOn: div.getElementsByTagName("input")[0].value === "on",
+
+		// 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: document.createElement("select").appendChild( document.createElement("option") ).selected,
+
 		// Will be defined later
+		checkClone: false,
 		scriptEval: false,
 		noCloneEvent: true,
 		boxModel: null
@@ -55,7 +66,7 @@
 	script.type = "text/javascript";
 	try {
 		script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
-	} catch(e){}
+	} catch(e) {}
 
 	root.insertBefore( script, root.firstChild );
 
@@ -70,7 +81,7 @@
 	root.removeChild( script );
 
 	if ( div.attachEvent && div.fireEvent ) {
-		div.attachEvent("onclick", function click(){
+		div.attachEvent("onclick", function click() {
 			// Cloning a node shouldn't copy over any
 			// bound event handlers (IE does this)
 			jQuery.support.noCloneEvent = false;
@@ -79,9 +90,18 @@
 		div.cloneNode(true).fireEvent("onclick");
 	}
 
+	div = document.createElement("div");
+	div.innerHTML = "<input type='radio' name='radiotest' checked='checked'/>";
+
+	var fragment = document.createDocumentFragment();
+	fragment.appendChild( div.firstChild );
+
+	// WebKit doesn't clone checked state correctly in fragments
+	jQuery.support.checkClone = fragment.cloneNode(true).cloneNode(true).lastChild.checked;
+
 	// Figure out if the W3C box model works as expected
 	// document.body must exist before we can do this
-	jQuery(function(){
+	jQuery(function() {
 		var div = document.createElement("div");
 		div.style.width = div.style.paddingLeft = "1px";
 
@@ -91,6 +111,25 @@
 		div = null;
 	});
 
+	// Technique from Juriy Zaytsev
+	// http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/
+	var eventSupported = function( eventName ) { 
+		var el = document.createElement("div"); 
+		eventName = "on" + eventName; 
+
+		var isSupported = (eventName in el); 
+		if ( !isSupported ) { 
+			el.setAttribute(eventName, "return;"); 
+			isSupported = typeof el[eventName] === "function"; 
+		} 
+		el = null; 
+
+		return isSupported; 
+	};
+	
+	jQuery.support.submitBubbles = eventSupported("submit");
+	jQuery.support.changeBubbles = eventSupported("change");
+
 	// release memory in IE
 	root = script = div = all = a = null;
 })();