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Editorial Team
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Asked: 2026-05-25T19:30:46+00:00

I am making a javascript greasemonkey script that redirects you when it finds a

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I am making a javascript greasemonkey script that redirects you when it finds a certain string in a webpage. Here is my code:

// ==UserScript==<br>
// @name No 009 Sound System!<br>
// @version 1.0<br>
// @namespace http://www.cakeman.biz/<br>
// @description Warn user when about to view a youtube video with 009 Sound System audio<br>
// @include http://*/*<br>
// @copyright  2011+, Zack Marotta 
// ==/UserScript==

var result, search_term = 'somerandomsearchterm';
var str = document.URL;
var url_check = str.search(search_term);
if (url_check !== -1) {
var result = search_term;
alert(str);
    window.location = "http://www.web.site";
}

Nothing happens when the script runs. What did I do wrong?

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1 Answer

  1. Editorial Team

    For some specific functions, you have to use unsafeWindow instead of window in a Greasemonkey UserScript. If you want to get your script work at GreaseMonkey and other locations, use this:

    var win = typeof unsafeWindow != "undefined" ? unsafeWindow : window;

    I’ve shrinkened by original answer, because that seems not to be your issue. Most likely, you’ve forgot to add // @include to your meta block.

    If your script has to redirect a certain, fixed page using GreaseMonkey, you can also shorten your scrip to:

    // ==UserScript==
// @name Redirect
// @include *i-am-afraid-of-this-word*
// ==/UserScript==

location.href = "http://www.google.com/search?q=need-help-getting-courage";

    For more information about the meta block, see: http://wiki.greasespot.net/Metadata_block

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