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Rewrite of globalEval. Uses window.execScript or window.eval with a trick to ensure proper context. Unit tests added.

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This commit is contained in:
jaubourg 2011-04-07 06:47:15 +02:00
parent 4552d135f4
commit f3c6077da0
2 changed files with 30 additions and 17 deletions
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27
src/core.js
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@ -561,24 +561,17 @@ jQuery.extend({
noop: function() {},
// Evalulates a script in a global context
// Evaluates a script in a global context
// Workarounds based on findings by Jim Driscoll
// http://weblogs.java.net/blog/driscoll/archive/2009/09/08/eval-javascript-global-context
globalEval: function( data ) {
if ( data && rnotwhite.test(data) ) {
// Inspired by code by Andrea Giammarchi
// http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
var head = document.head || document.getElementsByTagName( "head" )[0] || document.documentElement,
script = document.createElement( "script" );
if ( jQuery.support.scriptEval() ) {
script.appendChild( document.createTextNode( data ) );
} else {
script.text = data;
}
// Use insertBefore instead of appendChild to circumvent an IE6 bug.
// This arises when a base node is used (#2709).
head.insertBefore( script, head.firstChild );
head.removeChild( script );
if ( data && rnotwhite.test( data ) ) {
// We use execScript on Internet Explorer
// We use an anonymous function so that context is window
// rather than jQuery in Firefox
( window.execScript || function( data ) {
window[ "eval" ].call( window, data );
} )( data );
}
},

20
test/unit/core.js
View file

@ -172,6 +172,26 @@ test("selector state", function() {
);
});
test( "globalEval", function() {
expect( 3 );
jQuery.globalEval( "var globalEvalTest = true;" );
ok( window.globalEvalTest, "Test variable declarations are global" );
window.globalEvalTest = false;
jQuery.globalEval( "globalEvalTest = true;" );
ok( window.globalEvalTest, "Test variable assignments are global" );
window.globalEvalTest = false;
jQuery.globalEval( "this.globalEvalTest = true;" );
ok( window.globalEvalTest, "Test context (this) is the window object" );
window.globalEvalTest = undefined;
});
if ( !isLocal ) {
test("browser", function() {
stop();