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Defer scriptEval test until first use to prevent Content Security Policy inline-script violations from occuring. Fixes #7371.

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This commit is contained in:
Brandon Sterne 2011-01-17 16:31:12 -05:00 committed by jeresig
parent f01ef93aab
commit 220a0ce162
2 changed files with 32 additions and 22 deletions
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2
src/core.js
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@ -583,7 +583,7 @@ jQuery.extend({
script.type = "text/javascript";
if ( jQuery.support.scriptEval ) {
if ( jQuery.support.scriptEval() ) {
script.appendChild( document.createTextNode( data ) );
} else {
script.text = data;

30
src/support.js
View file

@ -4,10 +4,7 @@
jQuery.support = {};
var root = document.documentElement,
script = document.createElement("script"),
div = document.createElement("div"),
id = "script" + jQuery.now();
var div = document.createElement("div");
div.style.display = "none";
div.innerHTML = " <link/><table></table><a href='/a' style='color:red;float:left;opacity:.55;'>a</a><input type='checkbox'/>";
@ -64,7 +61,7 @@
deleteExpando: true,
optDisabled: false,
checkClone: false,
scriptEval: false,
_scriptEval: null,
noCloneEvent: true,
boxModel: null,
inlineBlockNeedsLayout: false,
@ -77,6 +74,12 @@
select.disabled = true;
jQuery.support.optDisabled = !opt.disabled;
jQuery.support.scriptEval = function() {
if ( jQuery.support._scriptEval === null) {
var root = document.documentElement,
script = document.createElement("script"),
id = "script" + jQuery.now();
script.type = "text/javascript";
try {
script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
@ -88,21 +91,28 @@
// tag with appendChild/createTextNode
// (IE doesn't support this, fails, and uses .text instead)
if ( window[ id ] ) {
jQuery.support.scriptEval = true;
jQuery.support._scriptEval = true;
delete window[ id ];
} else {
jQuery.support._scriptEval = false;
}
root.removeChild( script );
// release memory in IE
root = script = id = null;
}
return jQuery.support._scriptEval;
};
// Test to see if it's possible to delete an expando from an element
// Fails in Internet Explorer
try {
delete script.test;
delete div.test;
} catch(e) {
jQuery.support.deleteExpando = false;
}
root.removeChild( script );
if ( div.attachEvent && div.fireEvent ) {
div.attachEvent("onclick", function click() {
// Cloning a node shouldn't copy over any
@ -191,6 +201,6 @@
jQuery.support.changeBubbles = eventSupported("change");
// release memory in IE
root = script = div = all = a = null;
div = all = a = null;
})();
})( jQuery );