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| An extension of the [[Content Script Injection]] technique, this snippet automatically runs the ''entire'' user script in the content scope.
| | As of Greasemonkey 1.0 specifying <code>[[@grant]] none</code> provides the behavior previously available by this technique. |
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| <pre class='sample'>if(typeof __PAGE_SCOPE_RUN__ == 'undefined') {
| | The previous content of this page is available [http://wiki.greasespot.net/index.php?title=Content_Scope_Runner&oldid=7215 via history] only. |
| (function page_scope_runner() {
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| // Grab the anonymous function the entire script is wrapped in
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| var my_src = page_scope_runner.caller.toString();
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| // Alter the script's environment to prevent unbounded recursion...
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| var safe_source = "var __PAGE_SCOPE_RUN__ = 'yes';\n";
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| // ...and then allow it to call our anonymous function.
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| safeSource += "(" + my_src + ")();\n";
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| // Create a script node holding this script, plus a marker that lets us
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| // know we are running in the page scope (not the Greasemonkey sandbox).
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| var script = document.createElement('script');
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| script.setAttribute("type", "application/javascript");
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| script.appendChild(document.createTextNode(safe_src));
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| // Insert the script node into the page, so it will run, and immediately
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| // remove it to clean up.
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| document.documentElement.appendChild(script);
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| document.documentElement.removeChild(script);
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| })();
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| return;
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| }</pre>
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| As long as this is the ''first'' piece of code in your script, it will stop execution of the remainder of the script, and re-start execution completely within the content scope.
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| Thus you need not worry about any of the [[security]] restrictions from [[XPCNativeWrappers]] in the Greasemonkey [[sandbox]].
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| You also will, of course, not have access to any of the [[API]]s.
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| <!-- This still needs work.
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| == @require == | |
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| If used as the first [[Metadata Block#.40require|@require]]d script, this snippet will continue to run and work perfectly.
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| Try it by adding this line as the first @require in the [[Metadata Block]]:
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| <nowiki>// @require http://userscripts.org/scripts/source/68059.user.js</nowiki>
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| -->
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| [[Category:Coding Tips:Interacting With The Page]]
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| [[Category:@require Library]]
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