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

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1 parent 93750ce commit 299cccded9a01eb8b6a61e888f2499cac185b356 @timmywil timmywil committed Oct 31, 2011
Showing with 14 additions and 8 deletions.
  1. +14 −8 src/support.js
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@@ -256,22 +256,25 @@ jQuery.support = (function() {
// related to the invisible body in IE8
jQuery(function() {
var outer, inner, table, td, offsetSupport,
- bodyMarginTop = 1,
+ conMarginTop = 1,
ptlm = "position:absolute;top:0;left:0;width:1px;height:1px;margin:0;",
style = "style='" + ptlm + "border:5px solid #000;padding:0;'",
html = "<div " + style + "><div></div></div>" +
"<table " + style + " cellpadding='0' cellspacing='0'>" +
"<tbody><tr><td></td></tr></tbody></table>";
+ // Reconstruct a container
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");
- body.style.position = "static";
- body.style.top = "0px";
- body.style.marginTop = bodyMarginTop + "px";
testElement.style.cssText = ptlm + "border:0;visibility:hidden";
testElement.innerHTML = html;
- body.appendChild( testElement );
+ container.appendChild( testElement );
outer = testElement.firstChild;
inner = outer.firstChild;
td = outer.nextSibling.firstChild.firstChild.firstChild;
@@ -292,9 +295,12 @@ jQuery.support = (function() {
outer.style.position = "relative";
offsetSupport.subtractsBorderForOverflowNotVisible = ( inner.offsetTop === -5 );
- offsetSupport.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== bodyMarginTop );
+ offsetSupport.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== conMarginTop );
+
+ body.removeChild( container );
+ testElement = container = null;
- body.removeChild( testElement );
+ // Extend both jQuery.offset and jQuery.support
jQuery.extend( jQuery.offset, offsetSupport );
jQuery.extend( support, offsetSupport );
});
@@ -303,7 +309,7 @@ jQuery.support = (function() {
testElementParent.removeChild( testElement );
// 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;
})();

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