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Asked: 2026-05-23T17:08:34+00:00

I have a JavaScript function within an html file: <!DOCTYPE HTML PUBLIC -//W3C//DTD HTML

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I have a JavaScript function within an html file:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
 <html>
    <head>
        <script type="text/javascript">
            function redirect() {
                var queryString = location.search.replace(/^?commonHelpLocation=/, '');
                alert(queryString);
                window.location = queryString;
            }
        </script>
    </head>
    <body onload="redirect();"></body>
</html>

The url I am on is:
http://somesuperlongstring.mydomain.com/somedirectory/index.html?commonHelpLocation=http://someothersuperlongstring.somedomain.com/help/index.html

Thus, location.search returns: http://someothersuperlongstring.somedomain.com/help/index.html

But the function returns the same string as well, however, the regex should return only ?commonHelpLocation=http://someothersuperlongstring.somedomain.com/help/index.html

Is there something wrong with my regex?

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1 Answer

  1. Editorial Team

    Is there something wrong with my regex?

    Yes, ? is a regular expression reserved character. You need to escape it for a literal ?.

    var queryString = location.search.replace(/^\?commonHelpLocation=/, '');
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