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Fixes #9239. If the body is already present in the DOM, use a div within it to perform boxModel-related support tests. Unit test added.

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This commit is contained in:
jaubourg 2011-05-13 17:43:32 +02:00
parent b60c8560ce
commit ceba855c01
2 changed files with 45 additions and 10 deletions
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32
src/support.js
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@ -13,7 +13,9 @@ jQuery.support = (function() {
support,
fragment,
body,
bodyStyle,
testElementParent,
testElement,
testElementStyle,
tds,
events,
eventName,
@ -136,9 +138,11 @@ jQuery.support = (function() {
// Figure out if the W3C box model works as expected
div.style.width = div.style.paddingLeft = "1px";
// We use our own, invisible, body
body = document.createElement( "body" );
bodyStyle = {
body = document.getElementsByTagName( "body" )[ 0 ];
// We use our own, invisible, body unless the body is already present
// in which case we use a div (#9239)
testElement = document.createElement( body ? "div" : "body" );
testElementStyle = {
visibility: "hidden",
width: 0,
height: 0,
@ -147,11 +151,19 @@ jQuery.support = (function() {
// Set background to avoid IE crashes when removing (#9028)
background: "none"
};
for ( i in bodyStyle ) {
body.style[ i ] = bodyStyle[ i ];
if ( body ) {
jQuery.extend( testElementStyle, {
position: "absolute",
left: -1000,
top: -1000
});
}
body.appendChild( div );
documentElement.insertBefore( body, documentElement.firstChild );
for ( i in testElementStyle ) {
testElement.style[ i ] = testElementStyle[ i ];
}
testElement.appendChild( div );
testElementParent = body || documentElement;
testElementParent.insertBefore( testElement, testElementParent.firstChild );
// Check if a disconnected checkbox will retain its checked
// value of true after appended to the DOM (IE6/7)
@ -210,8 +222,8 @@ jQuery.support = (function() {
}
// Remove the body element we added
body.innerHTML = "";
documentElement.removeChild( body );
testElement.innerHTML = "";
testElementParent.removeChild( testElement );
// Technique from Juriy Zaytsev
// http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/

23
test/unit/support.js
View File

@ -30,3 +30,26 @@ function supportIFrameTest( title, url, noDisplay, func ) {
supportIFrameTest( "proper boxModel in compatMode CSS1Compat (IE6 and IE7)", "boxModelIE", function( compatMode, boxModel ) {
ok( compatMode !== "CSS1Compat" || boxModel, "boxModel properly detected" );
});
supportIFrameTest( "body background is not lost if set prior to loading jQuery (#9238)", "bodyBackground", function( color, support ) {
expect( 2 );
var okValue = {
"#000000": true,
"rgb(0, 0, 0)": true
};
ok( okValue[ color ], "color was not reset (" + color + ")" );
var i, passed = true;
for ( i in jQuery.support ) {
if ( jQuery.support[ i ] !== support[ i ] ) {
passed = false;
strictEquals( jQuery.support[ i ], support[ i ], "Support property " + i + " is different" );
}
}
for ( i in support ) {
if ( !( i in jQuery.support ) ) {
ok = false;
strictEquals( src[ i ], dest[ i ], "Unexpected property: " + i );
}
}
ok( passed, "Same support properties" );
});