“X-UA-Compatible” content=”IE=9; IE=8; IE=7; IE=EDGE”

by

If you support IE, for versions of Internet Explorer 8 and above, this:

<meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7" />

Forces the browser to render as that particular version’s standards. It is not supported for IE7 and below.

If you separate with semi-colon, it sets compatibility levels for different versions. For example:

<meta http-equiv="X-UA-Compatible" content="IE=7; IE=9" />

Renders IE7 and IE8 as IE7, but IE9 as IE9. It allows for different levels of backwards compatibility. In real life, though, you should only chose one of the options:

<meta http-equiv="X-UA-Compatible" content="IE=8" />

This allows for much easier testing and maintenance. Although generally the more useful version of this is using Emulate:

<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8" />

For this:

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

It forces the browser the render at whatever the most recent version’s standards are.

For more information, there is plenty to read about on MSDN,

More Related Contents:

  1. What does do?
  2. Force IE9 to emulate IE8. Possible?
  3. Emulate IE7 for IE8 but not for IE9 using “X-UA-Compatible”
  4. IE Compatibility Mode: ‘X-UA-Compatible’ tag ‘Edge’
  5. Hide scroll bar, but while still being able to scroll
  6. Is there a tag to turn off caching in all browsers? [duplicate]
  7. css ‘pointer-events’ property alternative for IE
  9. Download attribute on A tag not working in IE
  10. flex container min-height ignored in IE
  11. How to support placeholder attribute in IE8 and 9
  12. Button inside of anchor link works in Firefox but not in Internet Explorer?
  13. IF IE conditionals not working
  14. Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
  15. Force “Internet Explorer 8” browser mode in intranet
  16. How to change color of disabled html controls in IE8 using css
  17. Flexbox column-reverse in Firefox, Edge and IE
  18. Internet Explorer 11 disable “display intranet sites in compatibility view” via meta tag not working
  19. How to hide drop down arrow in IE8 & IE9?
  20. HTML TAG and local folder path with Internet Explorer
  21. HTML5 Video not working in IE 11
  22. Internet Explorer 11 word wrap is not working
  23. How to save a file from a website as PDF?
  24. What is haslayout?
  25. Use Excel VBA to click on a button in Internet Explorer, when the button has no “name” associated
  26. File opens instead of downloading in internet explorer in a href link
  27. Blank iFrame in IE
  28. @font-face not working with specific version of Internet Explorer 11
  29. Internet Explorer and clip-path
  30. Will targeting IE8 with conditional comments work?

Leave a Comment