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Editorial Team
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Asked: 2026-05-25T06:38:48+00:00

I don’t understand at all what <meta http-equiv=X-UA-Compatible content=… /> is for… Can someone

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I don’t understand at all what <meta http-equiv="X-UA-Compatible" content="..." /> is for…

Can someone explain…

  • What it does for different values of content?
  • What omitting it does for different browsers?
  • What the motivation for it is?
  • Why it exists?
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1 Answer

  1. Editorial Team

    It’s a horrible hack to cater for different bugs or incomplete implementations in various versions of the Internet Explorer browser. For example, this:

    <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7">

    will instruct IE9 to pretend it’s really IE7 to avoid any problems that might occur if your site works in IE7 but not IE9.

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