define( [
"../core",
"../var/document",
"../var/documentElement",
"../var/support"
], function( jQuery, document, documentElement, support ) {
"use strict";
( function() {
// Executing both pixelPosition & boxSizingReliable tests require only one layout
// so they're executed at the same time to save the second computation.
function computeStyleTests() {
// This is a singleton, we need to execute it only once
if ( !div ) {
return;
}
container.style.cssText = "position:absolute;left:-11111px;width:60px;" +
"margin-top:1px;padding:0;border:0";
div.style.cssText =
"position:relative;display:block;box-sizing:border-box;overflow:scroll;" +
"margin:auto;border:1px;padding:1px;" +
"width:60%;top:1%";
documentElement.appendChild( container ).appendChild( div );
var divStyle = window.getComputedStyle( div );
pixelPositionVal = divStyle.top !== "1%";
// Support: Android 4.0 - 4.3 only, Firefox <=3 - 44
reliableMarginLeftVal = roundPixelMeasures( divStyle.marginLeft ) === 12;
// Support: Android 4.0 - 4.3 only, Safari <=9.1 - 10.1, iOS <=7.0 - 9.3
// Some styles come back with percentage values, even though they shouldn't
div.style.right = "60%";
pixelBoxStylesVal = roundPixelMeasures( divStyle.right ) === 36;
// Support: IE 9 - 11 only
// Detect misreporting of content dimensions for box-sizing:border-box elements
boxSizingReliableVal = roundPixelMeasures( divStyle.width ) === 36;
// Support: IE 9 only
// Detect overflow:scroll screwiness (gh-3699)
div.style.position = "absolute";
scrollboxSizeVal = div.offsetWidth === 36 || "absolute";
documentElement.removeChild( container );
// Nullify the div so it wouldn't be stored in the memory and
// it will also be a sign that checks already performed
div = null;
}
function roundPixelMeasures( measure ) {
return Math.round( parseFloat( measure ) );
}
var pixelPositionVal, boxSizingReliableVal, scrollboxSizeVal, pixelBoxStylesVal,
reliableMarginLeftVal,
container = document.createElement( "div" ),
div = document.createElement( "div" );
// Finish early in limited (non-browser) environments
if ( !div.style ) {
return;
}
// Support: IE <=9 - 11 only
// Style of cloned element affects source element cloned (#8908)
div.style.backgroundClip = "content-box";
div.cloneNode( true ).style.backgroundClip = "";
support.clearCloneStyle = div.style.backgroundClip === "content-box";
jQuery.extend( support, {
boxSizingReliable: function() {
computeStyleTests();
return boxSizingReliableVal;
},
pixelBoxStyles: function() {
computeStyleTests();
return pixelBoxStylesVal;
},
pixelPosition: function() {
computeStyleTests();
return pixelPositionVal;
},
reliableMarginLeft: function() {
computeStyleTests();
return reliableMarginLeftVal;
},
scrollboxSize: function() {
computeStyleTests();
return scrollboxSizeVal;
}
} );
} )();
return support;
} );