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Editorial Team
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Asked: 2026-05-19T00:49:44+00:00

I tested the following code in FF 3.6 and IE 8. The former alerts

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I tested the following code in FF 3.6 and IE 8. The former alerts true, the latter alerts false. Why is this and how can I accomplish the same behavior in both browsers? Thank you!

<!DOCTYPE html>
<html>
    <head>
        <script>
            alert(window.location instanceof Location);
        </script>
    </head>
    <body>
    </body>
</html>
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1 Answer

  1. Editorial Team

    EDIT: With regard to the comment under your question, it sounds like you need to test for the difference between a DOM element, and a Location object.

    You’ll probably be better off testing for the DOM element using the nodeType property.

    if( obj.nodeType ) {
    // it was a DOM element
}

    Then you can test for various properties if nodeType wasn’t found, just to be certain it is a location object.

    if( obj.nodeType ) {
    // it was a DOM element
} else if( obj.hostname && obj.pathname ) {
    // it was a location object
} else {
    // some ERROR
}

    Original answer:

    This works for me in Chrome, Safari, Firefox:

    Object.prototype.toString.call(window.location) == '[object Location]';

    I can’t test in IE right this minute, though.

    This is the method noted in the ECMAScript spec Section 8.6.2 for getting the internal [[Class]] property name.

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