7 var div = document.createElement("div");
9 div.style.display = "none";
10 div.innerHTML = " <link/><table></table><a href='/a' style='color:red;float:left;opacity:.55;'>a</a><input type='checkbox'/>";
12 var all = div.getElementsByTagName("*"),
13 a = div.getElementsByTagName("a")[0],
14 select = document.createElement("select"),
15 opt = select.appendChild( document.createElement("option") );
17 // Can't get basic test support
18 if ( !all || !all.length || !a ) {
23 // IE strips leading whitespace when .innerHTML is used
24 leadingWhitespace: div.firstChild.nodeType === 3,
26 // Make sure that tbody elements aren't automatically inserted
27 // IE will insert them into empty tables
28 tbody: !div.getElementsByTagName("tbody").length,
30 // Make sure that link elements get serialized correctly by innerHTML
31 // This requires a wrapper element in IE
32 htmlSerialize: !!div.getElementsByTagName("link").length,
34 // Get the style information from getAttribute
35 // (IE uses .cssText insted)
36 style: /red/.test( a.getAttribute("style") ),
38 // Make sure that URLs aren't manipulated
39 // (IE normalizes it by default)
40 hrefNormalized: a.getAttribute("href") === "/a",
42 // Make sure that element opacity exists
43 // (IE uses filter instead)
44 // Use a regex to work around a WebKit issue. See #5145
45 opacity: /^0.55$/.test( a.style.opacity ),
47 // Verify style float existence
48 // (IE uses styleFloat instead of cssFloat)
49 cssFloat: !!a.style.cssFloat,
51 // Make sure that if no value is specified for a checkbox
52 // that it defaults to "on".
53 // (WebKit defaults to "" instead)
54 checkOn: div.getElementsByTagName("input")[0].value === "on",
56 // Make sure that a selected-by-default option has a working selected property.
57 // (WebKit defaults to false instead of true, IE too, if it's in an optgroup)
58 optSelected: opt.selected,
60 // Will be defined later
67 inlineBlockNeedsLayout: false,
68 shrinkWrapBlocks: false,
69 reliableHiddenOffsets: true
72 // Make sure that the options inside disabled selects aren't marked as disabled
73 // (WebKit marks them as diabled)
74 select.disabled = true;
75 jQuery.support.optDisabled = !opt.disabled;
77 jQuery.support.scriptEval = function() {
78 if ( jQuery.support._scriptEval === null) {
79 var root = document.documentElement,
80 script = document.createElement("script"),
81 id = "script" + jQuery.now();
83 script.type = "text/javascript";
85 script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
88 root.insertBefore( script, root.firstChild );
90 // Make sure that the execution of code works by injecting a script
91 // tag with appendChild/createTextNode
92 // (IE doesn't support this, fails, and uses .text instead)
94 jQuery.support._scriptEval = true;
97 jQuery.support._scriptEval = false;
100 root.removeChild( script );
101 // release memory in IE
102 root = script = id = null;
104 return jQuery.support._scriptEval;
107 // Test to see if it's possible to delete an expando from an element
108 // Fails in Internet Explorer
113 jQuery.support.deleteExpando = false;
116 if ( div.attachEvent && div.fireEvent ) {
117 div.attachEvent("onclick", function click() {
118 // Cloning a node shouldn't copy over any
119 // bound event handlers (IE does this)
120 jQuery.support.noCloneEvent = false;
121 div.detachEvent("onclick", click);
123 div.cloneNode(true).fireEvent("onclick");
126 div = document.createElement("div");
127 div.innerHTML = "<input type='radio' name='radiotest' checked='checked'/>";
129 var fragment = document.createDocumentFragment();
130 fragment.appendChild( div.firstChild );
132 // WebKit doesn't clone checked state correctly in fragments
133 jQuery.support.checkClone = fragment.cloneNode(true).cloneNode(true).lastChild.checked;
135 // Figure out if the W3C box model works as expected
136 // document.body must exist before we can do this
138 var div = document.createElement("div");
139 div.style.width = div.style.paddingLeft = "1px";
141 document.body.appendChild( div );
142 jQuery.boxModel = jQuery.support.boxModel = div.offsetWidth === 2;
144 if ( "zoom" in div.style ) {
145 // Check if natively block-level elements act like inline-block
146 // elements when setting their display to 'inline' and giving
148 // (IE < 8 does this)
149 div.style.display = "inline";
151 jQuery.support.inlineBlockNeedsLayout = div.offsetWidth === 2;
153 // Check if elements with layout shrink-wrap their children
155 div.style.display = "";
156 div.innerHTML = "<div style='width:4px;'></div>";
157 jQuery.support.shrinkWrapBlocks = div.offsetWidth !== 2;
160 div.innerHTML = "<table><tr><td style='padding:0;border:0;display:none'></td><td>t</td></tr></table>";
161 var tds = div.getElementsByTagName("td");
163 // Check if table cells still have offsetWidth/Height when they are set
164 // to display:none and there are still other visible table cells in a
165 // table row; if so, offsetWidth/Height are not reliable for use when
166 // determining if an element has been hidden directly using
167 // display:none (it is still safe to use offsets if a parent element is
168 // hidden; don safety goggles and see bug #4512 for more information).
169 // (only IE 8 fails this test)
170 jQuery.support.reliableHiddenOffsets = tds[0].offsetHeight === 0;
172 tds[0].style.display = "";
173 tds[1].style.display = "none";
175 // Check if empty table cells still have offsetWidth/Height
176 // (IE < 8 fail this test)
177 jQuery.support.reliableHiddenOffsets = jQuery.support.reliableHiddenOffsets && tds[0].offsetHeight === 0;
180 document.body.removeChild( div ).style.display = "none";
184 // Technique from Juriy Zaytsev
185 // http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/
186 var eventSupported = function( eventName ) {
187 var el = document.createElement("div");
188 eventName = "on" + eventName;
190 var isSupported = (eventName in el);
191 if ( !isSupported ) {
192 el.setAttribute(eventName, "return;");
193 isSupported = typeof el[eventName] === "function";
200 jQuery.support.submitBubbles = eventSupported("submit");
201 jQuery.support.changeBubbles = eventSupported("change");
203 // release memory in IE
204 div = all = a = null;