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Editorial Team
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Asked: 2026-06-13T23:38:59+00:00

I have a web site that works perfectly fine in IE9 when compatibility mode

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I have a web site that works perfectly fine in IE9 when compatibility mode is turned OFF (the compatibility symbol is gray). When compatibility mode is turned on (blue), the jQuery doesn’t work at all. I have added the following tag to the site to tell the browser that compatibility mode should NOT be used. 

 <meta http-equiv="X-UA-Compatible" content="IE=Edge" >

I have the doctype as this:

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Still, the browser doesn’t seem to default to standard mode and the user must manually ensure that they are NOT in compatibility mode.

Can I disable IE 9 Compatibility Mode? Have I done what I need to do to disable IE 9 Compatibility Mode? Can the user always override IE 9 Standards Mode?

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1 Answer

  1. Editorial Team

    Try using this DOCTYPE declaration:

    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

    As found in:
    https://stackoverflow.com/a/6049675/796404

    Another answer was to use the new HTML5 DOCTYPE:

    <!DOCTYPE html>

    As stated by:
    http://msdn.microsoft.com/en-us/library/gg699338(v=vs.85).aspx

    I hope this helps!

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