X-UA-Compatible is set to IE edge but it still doesn t stop Compatibility Mode

Question

I am quite confused  I should be able to set    lt meta http-equiv  X-UA-Compatible  content  IE edge    gt    and IE8 and IE9 should render the page using the latest rendering engine  However  I just tested it  and if Compatibility Mode is turned on elsewhere on our site  it will stay on for our page  even though we should be forcing it not to    How are you supposed to make sure IE does not use Compatibility Mode  even in an intranet    FWIW  I am using the HTML5 DocType declaration   lt  doctype html gt     Here are the first few lines of the page    lt  doctype html gt    lt  -- if lt IE 7   gt   lt html lang  en  class  innerpage no-js ie6  gt   lt   endif -- gt    lt  -- if IE 7   gt      lt html lang  en  class  innerpage no-js ie7  gt   lt   endif -- gt    lt  -- if IE 8   gt      lt html lang  en  class  innerpage no-js ie8  gt   lt   endif -- gt    lt  -- if  gte IE 9    IE   gt  lt  -- gt    lt html lang  en  class  innerpage no-js  gt    lt  -- lt   endif -- gt        lt head gt            lt meta charset  ISO-8859-1    gt            lt meta http-equiv  X-UA-Compatible  content  IE edge    gt     EDIT  I just learned that the default setting on IE8 is to use IE7 compatibility mode for intranet sites  Would this override the X-UA-Compatible meta tag

User · Answer

I also got the same issue of IE9 rendering in IE7 Document standards for local host. I tried many conditional comments tags but unsuccesful. In the end I just removed all conditional tags and just added meta tag immediatly after head like below and it worked like charm.

<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">

Hope it helps

User · Answer

If you need to override IE s Compatibility View Settings for intranet sites you can do so in the web config  IIS7  or through the custom HTTP headers in the web site s properties  IIS6  and set X-UA-Compatible there   The meta tag doesn t override IE s intranet setting in Compatibility View Settings  but if you set it at the hosting server it will override the compatibility   Example for web config in IIS7    lt system webServer gt       lt httpProtocol gt         lt customHeaders gt           lt add name  X-UA-Compatible  value  IE EmulateIE8    gt         lt  customHeaders gt       lt  httpProtocol gt   lt  system webServer gt    Edit  I removed the clear code from just before the add  it was an unnecessary oversight from copying and pasting   Good catch  commenters

User · Answer

As it turns out  this has to do with Microsoft s  intelligent  choice to make all intranet sites force to compatibility mode  even if X-UA-Compatible is set to IE edge

User · Answer

Server Side solution is the recommended one  as  TimmyFranks proposed in his answer  but if one needs to implement the X-UA-Compatible rule on the page level  please read the following tips  to benefit from the experience of the one who already got burned  The X-UA-Compatible meta tag must appear straight after the title in the  lt head gt  element  No other meta tags  css links and js scripts calls can be placed before it   lt head gt       lt title gt Site Title lt  title gt       lt meta http-equiv  quot X-UA-Compatible quot  content  quot IE edge chrome 1 quot  gt       lt meta charset  quot utf-8 quot  gt       lt script type  quot text javascript quot  src  quot  jsFile js quot  gt  lt  script gt       lt meta name  quot viewport quot  content  quot width device-width  initial-scale 1 0 quot    gt       lt link rel  quot apple-touch-icon quot  href  quot  apple-touch-icon png quot    gt       lt link rel  quot shortcut icon quot  href  quot  apple-touch-icon png quot    gt   lt  head gt   If there are any conditional comments in the page  lets say located in the  lt html gt    they must be placed under  after the  lt head gt      DON T  place class inside the HTML tag   lt  -- if gt IE 8  gt  lt  -- gt        lt html class  quot aboveIe8 quot  gt    lt  -- lt   endif -- gt      DO  place the class inside the BODY tag  lt  -- if gt IE 8  gt  lt  -- gt        lt body class  quot aboveIe8 quot  gt    lt  -- lt   endif -- gt   Html5BoilerPlate s team wrote about this bug - http   h5bp com i 378 They have several solutions  Regarding Intranet  amp  Compatibility view  there re settings when you go to tools  gt  Compatibility view settings

User · Answer

I was experiencing the same issue in IE11  None of these answers solved my issue  After digging a bit  I noticed that the browser was running in Enterprise mode   verify by hitting F12 and click the emulation tab  look for browser profile dropdown  The setting was locked  not allowing me to change the setting   I was able to change the profile to Desktop after deleting CurrentVersion from the following registry key   HKEY CURRENT USER Software Policies Microsoft Internet Explorer Main EnterpriseMode   After changing the mode to Desktop the answers on this post will work

User · Answer

As NEOSWF points out above  the Paul Irish conditional comments stops the meta tag having any affect   There are several fixes all here  http   nicolasgallagher com better-conditional-classnames-for-hack-free-css    These include   Adding two HTML classes  using server headers and adding a conditional comment above the doctype   On my latest project I decided to remove the Paul Irish conditional comments  I didn t like the idea of adding anything before the html without doing LOTS of testing first and it s nice to see what has been set just by looking at the HTML   In the end I surrounded a div straight after the body and used conditional comments eg     lt  -- if IE 7  gt  lt div class  ie7  gt  lt  -- lt   endif -- gt        regular body stuff    lt  -- if IE 7  gt  lt  div gt  lt  -- lt   endif -- gt    I could have done this around the body but its more difficult with CMSs like Wordpress    Obviously its another DIV inside the markup  but its only for older browsers   I think it could be a per project based decision though   I ve also read something about the charset meta tag needing to come in the first 1024 bytes so this ensures that   Sometimes the simplest  easiest to read ideas are the best and its definitely worth thinking about  Thanks to the 6th comment on the link above for pointing this out

User · Answer

I added the following to my htaccess file  which did the trick   BrowserMatch MSIE ie Header set X-UA-Compatible  IE Edge chrome 1  env ie

User · Answer

If you are using LAMP stack  then add this into your  htaccess file in your web root folder   No need to add it to every PHP file    lt IfModule mod headers c gt      Header add X-UA-Compatible  IE Edge   lt  IfModule gt

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Additionally  X-UA-Compatible must be the first meta tag in the head section   lt head gt       lt meta http-equiv  X-UA-Compatible  content  IE edge chrome 1  gt   lt  head gt    By the way  the correct order or the main head tags are    lt head gt       lt meta http-equiv  X-UA-Compatible  content  IE edge chrome 1  gt       lt meta charset  utf-8  gt       lt title gt Site Title lt  title gt       lt  -- other tags -- gt   lt  head gt    This way    we set the render engine to use before IExplorer begins to process the document then we set the encoding to use for all browser  then we print the title  which will be processed with the already defined encoding

User · Answer

IE 11 doesn t allow you to override the browser compatibility view setting anymore by sending the header      lt meta http-equiv  X-UA-Compatible  content  IE edge    gt      It appears the only way to force the browser to not use compatibility view is to have the user disable it in their browser   Ours is an Intranet site  and the default IE option is to use compatibility view for Intranet sites   What a pain   We were able to prevent the need for the user to change their browser settings for users of IE 9 and 10  but it no longer works in IE 11   Our IE users are switching to Chrome  where this is not a problem  and never has been

User · Answer

Note that if you are serving it from PHP  you can use the following code to fix it as well   header  X-UA-Compatible  IE Edge

User · Answer

X-UA-Compatible will only override the Document Mode  not the Browser Mode  and will not work for all intranet sites  if this is your case  the best solution is to disable  Display intranet sites in Compatibility View  and set a group policy setting to specify which intranet sites need compatibility mode

User · Answer

Timmy Franks had it right for me  We just had the issue today where the client had IE8 company-wide  and it was forcing the site we wrote for their intranet into compatibility mode  Setting  IE-Edge  seemed to fix it    lt httpProtocol gt     lt customHeaders gt       lt clear   gt       lt add name  X-UA-Compatible  value  IE Edge    gt     lt  customHeaders gt   lt  httpProtocol gt

User · Answer

I had the same issue after trying many combination I had this working  note I have compatibility checked for intranet    lt  DOCTYPE html PUBLIC  -  W3C  DTD XHTML 1 0 Transitional  EN   http   www w3 org TR xhtml1 DTD xhtml1-transitional dtd  gt   lt html xmlns  http   www w3 org 1999 xhtml  gt   lt meta http-equiv  X-UA-Compatible  content  IE edge  gt   lt head runat  server  gt

User · Answer

I was able to get around this loading the headers before the HTML with php  and it worked very well    lt  php  header   X-UA-Compatible  IE edge chrome 1     header   content  width device-width  initial-scale 1 0  maximum-scale 1 0  user-scalable no     include  ix html      gt     ix html is the content I wanted to load after sending the headers

User · Answer

Even if you have unchecked the  Display intranet sites in Compatibility View  option  and have the X-UA-Compatible in your response headers  there is another reason why your browser might default to  Compatibility View  anyways - your Group Policy  Look at your console for the following message      HTML1203  xxx xxx has been configured to run in Compatibility View through Group Policy     Where xxx xxx is the domain for your site  i e  test com   If you see this then the group policy for your domain is set so that any site ending in test com will automatically render in Compatibility mode regardless of doctype  headers  etc   For more information  please see the following link  explains the html codes   http   msdn microsoft com en-us library ie hh180764 v vs 85  aspx

User · Answer

For Nginx   add header  X-UA-Compatible   IE Edge chrome 1     ref   https   github com h5bp server-configs commit a5b0a8f736d68f7de27cdcb202e32975a74bd2c5

User · Answer

When your browser opens with  Compatibility Modes   even you remove and turn off all compability modes configuration from your web browser and Local Group Policy Editor  you can try to disable from register key   This also happen to me on using domain and sub-domain to connect server side  The machine is restricted to open in compability mode for all sub-domain   DISABLE COMPABILITY MODE FOR INTRANET  HKEY LOCAL MACHINE - SOFTWARE - Policies - Microsoft - Internet Explorer - BrowserEmulation -  IntranetCompalityMode Value should be 0  zero   And also remove existing domain name from PolicyList   Otherwise  you can add a new value  DWORD  that contain 0  zero  value data

[internet-explorer] X-UA-Compatible is set to IE=edge, but it still doesn't stop Compatibility Mode

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