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Run offset support tests at doc ready. Fixes #10613.

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timmywil
2011-10-31 09:50:21 -04:00
parent 38f087b5ae
commit 93750cee36
2 changed files with 27 additions and 27 deletions
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53
src/support.js
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@@ -20,8 +20,7 @@ jQuery.support = (function() {
events,
eventName,
i,
isSupported,
offsetSupport;
isSupported;
// Preliminary tests
div.setAttribute("className", "t");
@@ -231,9 +230,6 @@ jQuery.support = (function() {
( parseInt( ( document.defaultView.getComputedStyle( marginDiv, null ) || { marginRight: 0 } ).marginRight, 10 ) || 0 ) === 0;
}
// Remove the body element we added
testElement.innerHTML = "";
// Technique from Juriy Zaytsev
// http://perfectionkills.com/detecting-event-support-without-browser-sniffing/
// We only care about the case where non-standard event systems
@@ -256,29 +252,31 @@ jQuery.support = (function() {
}
}
// Determine fixed-position support early
testElement.style.position = "static";
testElement.style.top = "0px";
testElement.style.marginTop = "1px";
offsetSupport = (function( body, container ) {
var outer, inner, table, td, supports,
bodyMarginTop = parseFloat( body.style.marginTop ) || 0,
// Run fixed position tests at doc ready to avoid a crash
// related to the invisible body in IE8
jQuery(function() {
var outer, inner, table, td, offsetSupport,
bodyMarginTop = 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'>" +
"<tr><td></td></tr></table>";
"<tbody><tr><td></td></tr></tbody></table>";
container.style.cssText = ptlm + "border:0;visibility:hidden";
body = document.getElementsByTagName("body")[0];
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";
container.innerHTML = html;
body.insertBefore( container, body.firstChild );
outer = container.firstChild;
testElement.innerHTML = html;
body.appendChild( testElement );
outer = testElement.firstChild;
inner = outer.firstChild;
td = outer.nextSibling.firstChild.firstChild;
td = outer.nextSibling.firstChild.firstChild.firstChild;
supports = {
offsetSupport = {
doesNotAddBorder: ( inner.offsetTop !== 5 ),
doesAddBorderForTableAndCells: ( td.offsetTop === 5 )
};
@@ -287,20 +285,21 @@ jQuery.support = (function() {
inner.style.top = "20px";
// safari subtracts parent border width here which is 5px
supports.supportsFixedPosition = ( inner.offsetTop === 20 || inner.offsetTop === 15 );
offsetSupport.supportsFixedPosition = ( inner.offsetTop === 20 || inner.offsetTop === 15 );
inner.style.position = inner.style.top = "";
outer.style.overflow = "hidden";
outer.style.position = "relative";
supports.subtractsBorderForOverflowNotVisible = ( inner.offsetTop === -5 );
supports.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== bodyMarginTop );
offsetSupport.subtractsBorderForOverflowNotVisible = ( inner.offsetTop === -5 );
offsetSupport.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== bodyMarginTop );
return supports;
body.removeChild( testElement );
jQuery.extend( jQuery.offset, offsetSupport );
jQuery.extend( support, offsetSupport );
});
})( testElement, div );
jQuery.extend( support, offsetSupport );
testElement.innerHTML = "";
testElementParent.removeChild( testElement );
// Null connected elements to avoid leaks in IE