x-ua-compatible

I just saw this meta tag in the wild and was wondering it does and why it's used? <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> Reading the documentation on About.com, it says: "IE=edge" tells Internet Explorer to use the highest mode available to that version of IE. Internet Explorer 8 can support up to IE8 modes, IE9 can support IE9 modes and so on. But what about the chrome=1 tag? Bosworth99 It's for Google's Chrome Frame browser add-on. ChromeFrame can be installed on various versions of IE (especially handy for older versions that don't play nicely with modern web

I read Chrome Frame closed last month, I thus tried to understand what it'd mean for the X-UA tag and after 3 hours of research I still didn't find the answer I'm looking for, my question is the following : Is it still valid nowdays to use IE=edge,chrome=1 or should I stop at IE-edge from now on ? Or what would be the best pratice to do regarding X-UA, should it be avoided ? <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> serves two purposes. IE=edge : specifies that IE should run in the highest mode available to that version of IE as opposed to a compatability mode; IE8 can

I am wondering how do you stop people who are using IE 8 from going to Compatibility mode? <meta http-equiv="X-UA-Compatible" content="IE=8" /> I found this tag and I think this forces people to stay in IE-8 mode but I am not too sure and can't check as I have IE 9. If people are in IE 9 mode I force them to not go into IE 8 or IE 7 Compatibility mode? I tried to put the above line in my code and went to IE 9 -> Tools -> Compatibility View(Grayed Out) but "Compatibility View Settings" was not grayed out and it seems you could add the site through there. So should that not disable? Sriranga

I've taken several online courses lately and I still see some instructors add the following meta tag to the top of their documents by default: <meta http-equiv="X-UA-Compatible" content="IE=edge"> The thinking appears to be that this is just as important and useful as <meta charset="UTF-8"> . But why? According to Microsoft's Modern.ie documentation it's "best practice" which "ensures Internet Explorer uses the latest engine". Ok, fair enough. However, if you follow the flow diagram on MSDN it clearly shows that a document without `X-UA-Compatible information is forwarded to the user's

As the question states basically. If you have X-UA-Compatible in both your HTTP headers and a meta tag on your document, and they conflict, which one gets respected by IE? TL;DR: The meta tag wins I found the following (updated) flowchart here (link is broken) and associated blog post that provides an explanation of how IE9 determines document mode: 来源： https://stackoverflow.com/questions/9128739/which-x-ua-compatible-takes-precedence-http-header-or-meta-tags

Is this possible at all? I tried adding this to the page but it didn't change a thing. <meta http-equiv="X-UA-Compatible" content="IE=8"> UPDATE- I'm trying to do this because our site has some IE9 specific CSS issues, which wouldn't appear in IE8. Thanks jsims281 You can use the document compatibility mode to do this, which is what you were trying.. However, thing to note is: It must appear in the Web page's header (the HEAD section) before all other elements, except for the title element and other meta elements Hope that was the issue.. Also, The X-UA-compatible header is not case sensitive

I have a website depending on vector drawing, for Internet Explorer I'm using VML and for other browsers I'm using SVG . IE8 however, doesn't have support for neither without falling back to IE7-mode which has VML. Therefore I'm including <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /> . The problem (well, actually a good thing) is that IE9 now has support for SVG so I don't want it to fall back to IE7-mode which has much worse performance and compatibility. How do I tell only IE8 to fall back to IE7-mode but let IE9 stay in IE9-mode? Right now I'm doing a server side check on

In a domain-controlled environment I'm finding that the compatibility mode is triggered on certain clients (winXP/Win7, IE8/IE9) even when we are providing a X-UA tags, a !DOCTYPE definition and "IE=Edge" response headers. These clients have the "display intranet sites in compatibility view" checkbox ticked. Which is precisely what I'm trying to override. The following is the documentation that I've used to try understand how IE decides to actually trigger the compatibility mode. http://msdn.microsoft.com/en-us/library/ff406036%28v=VS.85%29.aspx http://blogs.msdn.com/b/ie/archive/2009/02/16