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;
105 return jQuery.support._scriptEval;
108 // Test to see if it's possible to delete an expando from an element
109 // Fails in Internet Explorer
114 jQuery.support.deleteExpando = false;
117 if ( !div.addEventListener && div.attachEvent && div.fireEvent ) {
118 div.attachEvent("onclick", function click() {
119 // Cloning a node shouldn't copy over any
120 // bound event handlers (IE does this)
121 jQuery.support.noCloneEvent = false;
122 div.detachEvent("onclick", click);
124 div.cloneNode(true).fireEvent("onclick");
127 div = document.createElement("div");
128 div.innerHTML = "<input type='radio' name='radiotest' checked='checked'/>";
130 var fragment = document.createDocumentFragment();
131 fragment.appendChild( div.firstChild );
133 // WebKit doesn't clone checked state correctly in fragments
134 jQuery.support.checkClone = fragment.cloneNode(true).cloneNode(true).lastChild.checked;
136 // Figure out if the W3C box model works as expected
137 // document.body must exist before we can do this
139 var div = document.createElement("div"),
140 body = document.getElementsByTagName("body")[0];
142 // Frameset documents with no body should not run this code
147 div.style.width = div.style.paddingLeft = "1px";
148 body.appendChild( div );
149 jQuery.boxModel = jQuery.support.boxModel = div.offsetWidth === 2;
151 if ( "zoom" in div.style ) {
152 // Check if natively block-level elements act like inline-block
153 // elements when setting their display to 'inline' and giving
155 // (IE < 8 does this)
156 div.style.display = "inline";
158 jQuery.support.inlineBlockNeedsLayout = div.offsetWidth === 2;
160 // Check if elements with layout shrink-wrap their children
162 div.style.display = "";
163 div.innerHTML = "<div style='width:4px;'></div>";
164 jQuery.support.shrinkWrapBlocks = div.offsetWidth !== 2;
167 div.innerHTML = "<table><tr><td style='padding:0;border:0;display:none'></td><td>t</td></tr></table>";
168 var tds = div.getElementsByTagName("td");
170 // Check if table cells still have offsetWidth/Height when they are set
171 // to display:none and there are still other visible table cells in a
172 // table row; if so, offsetWidth/Height are not reliable for use when
173 // determining if an element has been hidden directly using
174 // display:none (it is still safe to use offsets if a parent element is
175 // hidden; don safety goggles and see bug #4512 for more information).
176 // (only IE 8 fails this test)
177 jQuery.support.reliableHiddenOffsets = tds[0].offsetHeight === 0;
179 tds[0].style.display = "";
180 tds[1].style.display = "none";
182 // Check if empty table cells still have offsetWidth/Height
183 // (IE < 8 fail this test)
184 jQuery.support.reliableHiddenOffsets = jQuery.support.reliableHiddenOffsets && tds[0].offsetHeight === 0;
187 body.removeChild( div ).style.display = "none";
191 // Technique from Juriy Zaytsev
192 // http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/
193 var eventSupported = function( eventName ) {
194 var el = document.createElement("div");
195 eventName = "on" + eventName;
197 // We only care about the case where non-standard event systems
198 // are used, namely in IE. Short-circuiting here helps us to
199 // avoid an eval call (in setAttribute) which can cause CSP
200 // to go haywire. See: https://developer.mozilla.org/en/Security/CSP
201 if ( !el.attachEvent ) {
205 var isSupported = (eventName in el);
206 if ( !isSupported ) {
207 el.setAttribute(eventName, "return;");
208 isSupported = typeof el[eventName] === "function";
215 jQuery.support.submitBubbles = eventSupported("submit");
216 jQuery.support.changeBubbles = eventSupported("change");
218 // release memory in IE
219 div = all = a = null;