X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fsupport.js;h=febff15973f3e7722883118744da1e67511d738b;hb=a44ec402771f6d622506f39073d0be260400dd21;hp=04c3a2a69d6c16fc155f56d9ecbc9489b3699ff5;hpb=f8ef75eb9124ce924be5fb521c783efd5c996e33;p=jquery.git
diff --git a/src/support.js b/src/support.js
index 04c3a2a..febff15 100644
--- a/src/support.js
+++ b/src/support.js
@@ -1,14 +1,16 @@
-(function(){
+(function( jQuery ) {
+
+(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 = '
a';
+ div.innerHTML = " a";
var all = div.getElementsByTagName("*"),
a = div.getElementsByTagName("a")[0];
@@ -20,7 +22,7 @@
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 +42,24 @@
// Make sure that element opacity exists
// (IE uses filter instead)
- opacity: a.style.opacity === "0.5",
+ // 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 +68,7 @@
script.type = "text/javascript";
try {
script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
- } catch(e){}
+ } catch(e) {}
root.insertBefore( script, root.firstChild );
@@ -70,7 +83,7 @@
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;
@@ -79,17 +92,49 @@
div.cloneNode(true).fireEvent("onclick");
}
+ div = document.createElement("div");
+ div.innerHTML = "";
+
+ 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";
document.body.appendChild( div );
jQuery.boxModel = jQuery.support.boxModel = div.offsetWidth === 2;
document.body.removeChild( div ).style.display = 'none';
+ 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;
+})( jQuery );
jQuery.props = {
"for": "htmlFor",
@@ -98,5 +143,10 @@ jQuery.props = {
maxlength: "maxLength",
cellspacing: "cellSpacing",
rowspan: "rowSpan",
- tabindex: "tabIndex"
+ colspan: "colSpan",
+ tabindex: "tabIndex",
+ usemap: "useMap",
+ frameborder: "frameBorder"
};
+
+})( jQuery );