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jQuery.support = (function() {
var support, all, a, select, opt, input, fragment,
div = document.createElement("div");
// Setup
div.setAttribute( "className", "t" );
div.innerHTML = " <link/><table></table><a>a</a><input type='checkbox'/>";
// Support tests won't run in some limited or non-browser environments
all = div.getElementsByTagName("*");
a = div.getElementsByTagName("a")[ 0 ];
if ( !all || !a || !all.length ) {
return {};
}
// First batch of tests
select = document.createElement("select");
opt = select.appendChild( document.createElement("option") );
input = div.getElementsByTagName("input")[ 0 ];
a.style.cssText = "float:left;opacity:.5";
support = {
// Verify style float existence
// (IE uses styleFloat instead of cssFloat)
cssFloat: !!a.style.cssFloat,
// Check the default checkbox/radio value ("" on WebKit; "on" elsewhere)
checkOn: !!input.value,
// Must access the parent to make an option select properly
// Support: IE9, IE10
optSelected: opt.selected,
// jQuery.support.boxModel DEPRECATED in 1.8 since we don't support Quirks Mode
boxModel: document.compatMode === "CSS1Compat",
// Will be defined later
noCloneEvent: true,
reliableMarginRight: true,
boxSizingReliable: true,
pixelPosition: false
};
// Make sure checked status is properly cloned
input.checked = true;
support.noCloneChecked = input.cloneNode( true ).checked;
// Make sure that the options inside disabled selects aren't marked as disabled
// (WebKit marks them as disabled)
select.disabled = true;
support.optDisabled = !opt.disabled;
// Check if an input maintains its value after becoming a radio
input = document.createElement("input");
input.value = "t";
input.setAttribute( "type", "radio" );
support.radioValue = input.value === "t";
// #11217 - WebKit loses check when the name is after the checked attribute
input.setAttribute( "checked", "t" );
input.setAttribute( "name", "t" );
fragment = document.createDocumentFragment();
fragment.appendChild( input );
// Check if a disconnected checkbox will retain its checked
// value of true after appended to the DOM (IE6/7)
support.appendChecked = input.checked;
// WebKit doesn't clone checked state correctly in fragments
support.checkClone = fragment.cloneNode( true ).cloneNode( true ).lastChild.checked;
// Support: IE<9
// Opera does not clone events (and typeof div.attachEvent === undefined).
// IE9-10 clones events bound via attachEvent, but they don't trigger with .click()
if ( div.attachEvent ) {
div.attachEvent( "onclick", function() {
support.noCloneEvent = false;
});
div.cloneNode( true ).click();
}
// Support: Firefox 17+
// Beware of CSP restrictions (https://developer.mozilla.org/en/Security/CSP), test/csp.php
div.setAttribute( "onfocusin", "t" );
support.focusinBubbles = "onfocusin" in window || div.attributes.onfocusin.expando === false;
// Run tests that need a body at doc ready
jQuery(function() {
var container, marginDiv, tds,
divReset = "padding:0;margin:0;border:0;display:block;box-sizing:content-box;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;",
body = document.getElementsByTagName("body")[0];
if ( !body ) {
// Return for frameset docs that don't have a body
return;
}
container = document.createElement("div");
container.style.cssText = "border:0;width:0;height:0;position:absolute;top:0;left:-9999px;margin-top:1px";
// Check box-sizing and margin behavior
body.appendChild( container ).appendChild( div );
div.innerHTML = "";
div.style.cssText = "box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;padding:1px;border:1px;display:block;width:4px;margin-top:1%;position:absolute;top:1%;";
support.boxSizing = ( div.offsetWidth === 4 );
support.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== 1 );
// Use window.getComputedStyle because jsdom on node.js will break without it.
if ( window.getComputedStyle ) {
support.pixelPosition = ( window.getComputedStyle( div, null ) || {} ).top !== "1%";
support.boxSizingReliable = ( window.getComputedStyle( div, null ) || { width: "4px" } ).width === "4px";
// Check if div with explicit width and no margin-right incorrectly
// gets computed margin-right based on width of container. (#3333)
// Fails in WebKit before Feb 2011 nightlies
// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
marginDiv = div.appendChild( document.createElement("div") );
marginDiv.style.cssText = div.style.cssText = divReset;
marginDiv.style.marginRight = marginDiv.style.width = "0";
div.style.width = "1px";
support.reliableMarginRight =
!parseFloat( ( window.getComputedStyle( marginDiv, null ) || {} ).marginRight );
}
body.removeChild( container );
// Null elements to avoid leaks in IE
container = div = tds = marginDiv = null;
});
// Null elements to avoid leaks in IE
all = select = fragment = opt = a = input = null;
return support;
})();
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