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Construct a new container so that styles on the body are not affected

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timmywil 2011-10-31 10:50:19 -04:00
parent 93750cee36
commit 299cccded9
1 changed files with 14 additions and 8 deletions
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22
src/support.js
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@ -256,22 +256,25 @@ jQuery.support = (function() {
// related to the invisible body in IE8 // related to the invisible body in IE8
jQuery(function() { jQuery(function() {
var outer, inner, table, td, offsetSupport, var outer, inner, table, td, offsetSupport,
bodyMarginTop = 1, conMarginTop = 1,
ptlm = "position:absolute;top:0;left:0;width:1px;height:1px;margin:0;", ptlm = "position:absolute;top:0;left:0;width:1px;height:1px;margin:0;",
style = "style='" + ptlm + "border:5px solid #000;padding:0;'", style = "style='" + ptlm + "border:5px solid #000;padding:0;'",
html = "<div " + style + "><div></div></div>" + html = "<div " + style + "><div></div></div>" +
"<table " + style + " cellpadding='0' cellspacing='0'>" + "<table " + style + " cellpadding='0' cellspacing='0'>" +
"<tbody><tr><td></td></tr></tbody></table>"; "<tbody><tr><td></td></tr></tbody></table>";
// Reconstruct a container
body = document.getElementsByTagName("body")[0]; body = document.getElementsByTagName("body")[0];
container = document.createElement("div");
container.style.cssText = "width:0;height:0;border:0;visibility:hidden;position:static;top:0;marginTop:" + conMarginTop + "px";
body.insertBefore( container, body.firstChild );
// Construct a test element
testElement = document.createElement("div"); testElement = document.createElement("div");
body.style.position = "static";
body.style.top = "0px";
body.style.marginTop = bodyMarginTop + "px";
testElement.style.cssText = ptlm + "border:0;visibility:hidden"; testElement.style.cssText = ptlm + "border:0;visibility:hidden";
testElement.innerHTML = html; testElement.innerHTML = html;
body.appendChild( testElement ); container.appendChild( testElement );
outer = testElement.firstChild; outer = testElement.firstChild;
inner = outer.firstChild; inner = outer.firstChild;
td = outer.nextSibling.firstChild.firstChild.firstChild; td = outer.nextSibling.firstChild.firstChild.firstChild;
@ -292,9 +295,12 @@ jQuery.support = (function() {
outer.style.position = "relative"; outer.style.position = "relative";
offsetSupport.subtractsBorderForOverflowNotVisible = ( inner.offsetTop === -5 ); offsetSupport.subtractsBorderForOverflowNotVisible = ( inner.offsetTop === -5 );
offsetSupport.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== bodyMarginTop ); offsetSupport.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== conMarginTop );
body.removeChild( testElement ); body.removeChild( container );
testElement = container = null;
// Extend both jQuery.offset and jQuery.support
jQuery.extend( jQuery.offset, offsetSupport ); jQuery.extend( jQuery.offset, offsetSupport );
jQuery.extend( support, offsetSupport ); jQuery.extend( support, offsetSupport );
}); });
@ -303,7 +309,7 @@ jQuery.support = (function() {
testElementParent.removeChild( testElement ); testElementParent.removeChild( testElement );
// Null connected elements to avoid leaks in IE // Null connected elements to avoid leaks in IE
testElement = fragment = select = opt = body = marginDiv = div = input = null; fragment = select = opt = body = marginDiv = div = input = null;
return support; return support;
})(); })();