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Editorial Team
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Asked: 2026-05-25T10:20:32+00:00

When doing this: var a = new Array(a, b); a.map(function() { }); in IE8

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When doing this:

var a = new Array("a", "b");
a.map(function() { });

in IE8 I get:

"Object doesn't support this property or method"

Is this method not supported in IE8, or do I have some other problem? I’ve had a Google, but get lots of Google Maps javascript issues/questions…

Edit: OK so IE8 and below DO NOT support the .map() function. Copy-paste the code from MDN here which will add the .map() function to the Array prototype exactly per the specs if not natively supported (and it seems to work perfectly).

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1 Answer

  1. Editorial Team

    IE8 doesn’t support map(). When in doubt, check MDN (Mozilla Developer Network):

    map – MDN

    Looks like IE added support for map() in version 9.

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