jQuery.support = {};
- var root = document.documentElement,
- script = document.createElement("script"),
- div = document.createElement("div"),
- id = "script" + jQuery.now();
+ var div = document.createElement("div");
div.style.display = "none";
div.innerHTML = " <link/><table></table><a href='/a' style='color:red;float:left;opacity:.55;'>a</a><input type='checkbox'/>";
optSelected: opt.selected,
// Will be defined later
+ deleteExpando: true,
optDisabled: false,
checkClone: false,
- scriptEval: false,
+ _scriptEval: null,
noCloneEvent: true,
boxModel: null,
inlineBlockNeedsLayout: false,
+ shrinkWrapBlocks: false,
reliableHiddenOffsets: true
};
select.disabled = true;
jQuery.support.optDisabled = !opt.disabled;
- script.type = "text/javascript";
- try {
- script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
- } catch(e) {}
+ jQuery.support.scriptEval = function() {
+ if ( jQuery.support._scriptEval === null ) {
+ var root = document.documentElement,
+ script = document.createElement("script"),
+ id = "script" + jQuery.now();
+
+ script.type = "text/javascript";
+ try {
+ script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
+ } catch(e) {}
+
+ root.insertBefore( script, root.firstChild );
+
+ // Make sure that the execution of code works by injecting a script
+ // tag with appendChild/createTextNode
+ // (IE doesn't support this, fails, and uses .text instead)
+ if ( window[ id ] ) {
+ jQuery.support._scriptEval = true;
+ delete window[ id ];
+ } else {
+ jQuery.support._scriptEval = false;
+ }
+
+ root.removeChild( script );
+ // release memory in IE
+ root = script = id = null;
+ }
+
+ return jQuery.support._scriptEval;
+ };
- root.insertBefore( script, root.firstChild );
+ // Test to see if it's possible to delete an expando from an element
+ // Fails in Internet Explorer
+ try {
+ delete div.test;
- // Make sure that the execution of code works by injecting a script
- // tag with appendChild/createTextNode
- // (IE doesn't support this, fails, and uses .text instead)
- if ( window[ id ] ) {
- jQuery.support.scriptEval = true;
- delete window[ id ];
+ } catch(e) {
+ jQuery.support.deleteExpando = false;
}
- root.removeChild( script );
-
if ( div.attachEvent && div.fireEvent ) {
div.attachEvent("onclick", function click() {
// Cloning a node shouldn't copy over any
// Figure out if the W3C box model works as expected
// document.body must exist before we can do this
jQuery(function() {
- var div = document.createElement("div");
- div.style.width = div.style.paddingLeft = "1px";
+ var div = document.createElement("div"),
+ body = document.getElementsByTagName("body")[0];
- document.body.appendChild( div );
- jQuery.boxModel = jQuery.support.boxModel = div.offsetWidth === 2;
+ // Frameset documents with no body should not run this code
+ if ( !body ) {
+ return;
+ }
- // Check if natively block-level elements act like inline-block
- // elements when setting their display to 'inline'
- // (IE < 8 does this)
- if ( 'zoom' in div.style ) {
- div.style.display = 'inline';
+ div.style.width = div.style.paddingLeft = "1px";
+ body.appendChild( div );
+ jQuery.boxModel = jQuery.support.boxModel = div.offsetWidth === 2;
- // Layout is necessary to trigger this “feature”
+ if ( "zoom" in div.style ) {
+ // Check if natively block-level elements act like inline-block
+ // elements when setting their display to 'inline' and giving
+ // them layout
+ // (IE < 8 does this)
+ div.style.display = "inline";
div.style.zoom = 1;
jQuery.support.inlineBlockNeedsLayout = div.offsetWidth === 2;
+
+ // Check if elements with layout shrink-wrap their children
+ // (IE 6 does this)
+ div.style.display = "";
+ div.innerHTML = "<div style='width:4px;'></div>";
+ jQuery.support.shrinkWrapBlocks = div.offsetWidth !== 2;
}
+ div.innerHTML = "<table><tr><td style='padding:0;border:0;display:none'></td><td>t</td></tr></table>";
+ var tds = div.getElementsByTagName("td");
+
// Check if table cells still have offsetWidth/Height when they are set
// to display:none and there are still other visible table cells in a
// table row; if so, offsetWidth/Height are not reliable for use when
// display:none (it is still safe to use offsets if a parent element is
// hidden; don safety goggles and see bug #4512 for more information).
// (only IE 8 fails this test)
- div.innerHTML = '<table><tr><td style="display:none"></td><td>t</td></tr></table>';
- jQuery.support.reliableHiddenOffsets = div.getElementsByTagName('td')[0].offsetHeight === 0;
- div.innerHTML = '';
+ jQuery.support.reliableHiddenOffsets = tds[0].offsetHeight === 0;
+
+ tds[0].style.display = "";
+ tds[1].style.display = "none";
- document.body.removeChild( div ).style.display = 'none';
- div = null;
+ // Check if empty table cells still have offsetWidth/Height
+ // (IE < 8 fail this test)
+ jQuery.support.reliableHiddenOffsets = jQuery.support.reliableHiddenOffsets && tds[0].offsetHeight === 0;
+ div.innerHTML = "";
+
+ body.removeChild( div ).style.display = "none";
+ div = tds = 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;
+ var eventSupported = function( eventName ) {
+ var el = document.createElement("div");
+ eventName = "on" + eventName;
+
+ // We only care about the case where non-standard event systems
+ // are used, namely in IE. Short-circuiting here helps us to
+ // avoid an eval call (in setAttribute) which can cause CSP
+ // to go haywire. See: https://developer.mozilla.org/en/Security/CSP
+ if ( !el.attachEvent ) {
+ return true;
+ }
+
+ 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;
+ div = all = a = null;
})();
-
-jQuery.props = {
- "for": "htmlFor",
- "class": "className",
- readonly: "readOnly",
- maxlength: "maxLength",
- cellspacing: "cellSpacing",
- rowspan: "rowSpan",
- colspan: "colSpan",
- tabindex: "tabIndex",
- usemap: "useMap",
- frameborder: "frameBorder"
-};
-
})( jQuery );
git.asbjorn.biz / jquery.git / blobdiff