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
66 inlineBlockNeedsLayout: false,
67 shrinkWrapBlocks: false,
68 reliableHiddenOffsets: true
71 // Make sure that the options inside disabled selects aren't marked as disabled
72 // (WebKit marks them as diabled)
73 select.disabled = true;
74 jQuery.support.optDisabled = !opt.disabled;
76 var _scriptEval = null;
77 jQuery.support.scriptEval = function() {
78 if ( _scriptEval === null ) {
79 var root = document.documentElement,
80 script = document.createElement("script"),
81 id = "script" + jQuery.now();
84 script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
87 root.insertBefore( script, root.firstChild );
89 // Make sure that the execution of code works by injecting a script
90 // tag with appendChild/createTextNode
91 // (IE doesn't support this, fails, and uses .text instead)
99 root.removeChild( script );
100 // release memory in IE
101 root = script = id = null;
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.addEventListener && 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 body = document.getElementsByTagName("body")[0];
141 // Frameset documents with no body should not run this code
146 div.style.width = div.style.paddingLeft = "1px";
147 body.appendChild( div );
148 jQuery.boxModel = jQuery.support.boxModel = div.offsetWidth === 2;
150 if ( "zoom" in div.style ) {
151 // Check if natively block-level elements act like inline-block
152 // elements when setting their display to 'inline' and giving
154 // (IE < 8 does this)
155 div.style.display = "inline";
157 jQuery.support.inlineBlockNeedsLayout = div.offsetWidth === 2;
159 // Check if elements with layout shrink-wrap their children
161 div.style.display = "";
162 div.innerHTML = "<div style='width:4px;'></div>";
163 jQuery.support.shrinkWrapBlocks = div.offsetWidth !== 2;
166 div.innerHTML = "<table><tr><td style='padding:0;border:0;display:none'></td><td>t</td></tr></table>";
167 var tds = div.getElementsByTagName("td");
169 // Check if table cells still have offsetWidth/Height when they are set
170 // to display:none and there are still other visible table cells in a
171 // table row; if so, offsetWidth/Height are not reliable for use when
172 // determining if an element has been hidden directly using
173 // display:none (it is still safe to use offsets if a parent element is
174 // hidden; don safety goggles and see bug #4512 for more information).
175 // (only IE 8 fails this test)
176 jQuery.support.reliableHiddenOffsets = tds[0].offsetHeight === 0;
178 tds[0].style.display = "";
179 tds[1].style.display = "none";
181 // Check if empty table cells still have offsetWidth/Height
182 // (IE < 8 fail this test)
183 jQuery.support.reliableHiddenOffsets = jQuery.support.reliableHiddenOffsets && tds[0].offsetHeight === 0;
186 body.removeChild( div ).style.display = "none";
190 // Technique from Juriy Zaytsev
191 // http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/
192 var eventSupported = function( eventName ) {
193 var el = document.createElement("div");
194 eventName = "on" + eventName;
196 // We only care about the case where non-standard event systems
197 // are used, namely in IE. Short-circuiting here helps us to
198 // avoid an eval call (in setAttribute) which can cause CSP
199 // to go haywire. See: https://developer.mozilla.org/en/Security/CSP
200 if ( !el.attachEvent ) {
204 var isSupported = (eventName in el);
205 if ( !isSupported ) {
206 el.setAttribute(eventName, "return;");
207 isSupported = typeof el[eventName] === "function";
214 jQuery.support.submitBubbles = eventSupported("submit");
215 jQuery.support.changeBubbles = eventSupported("change");
217 // release memory in IE
218 div = all = a = null;