Friday, May 26th, 2006
Subscript Loader: Handling JS scope
Category: JavaScript, Tip
Using this you can better handle scoping issues in JavaScript (albeit Mozilla only for now).
JAVASCRIPT:
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const scopeRegistry = {
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subscriptLoader: Components.classes["@mozilla.org/moz/jssubscript-loader;1"]
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.getService(Components.interfaces.mozIJSSubScriptLoader),
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registeredScopes: {},
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getScope: function getScope(aScopeId) {
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if (typeof this.registeredScopes[aScopeId] == "undefined")
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this.registeredScopes[aScopeId] = {};
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return this.registeredScopes[aScopeId];
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},
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loadScriptByScope: function loadScriptByScope(aURL, aScopeId) {
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if (aScopeId) {
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var scopeObj = this.getScope(aScopeId);
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this.subscriptLoader.loadSubScript(aURL, scopeObj);
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} else {
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this.subscriptLoader.loadSubScript(aURL);
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}
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}
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}
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4.1 rating from 43 votes
Hmm, does this solve some problem not already solved by JSAN?
JSAN.use('Foo.Bar');
…that looks a lot easier to me, and JSAN is reasonably cross-browser-happy. Am I missing something?
Seems like this might be a handy way to load external libraries in a GreaseMonkey script? Anyone (with more time on their hands than me) played with this?