X-ua-compatible failure problem

Sometimes found on the page written <meta http-equiv= "x-ua-compatible" content= "ie=8"/>, but the document mode is still unchanged;

Reason:

1. DOCTYPE statement

<! DOCTYPE HTML PUBLIC "-//w3c//dtd XHTML 1.1//en" "Http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" >

(<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "HTTP://WWW.W3.ORG/TR/HTML4/LOOSE.DTD" > This declaration found not to be so, The estimated version is too low)

2, in order to prevent failure, x-ua-compatible preferably immediately after the head, do not have any nonstandard label.

(The x-ua-compatible header is not case-sensitive; However, it must appear in the Web page before all other elements except the title element and other meta elements)

It's best to start with the insurance:

<! DOCTYPE HTML PUBLIC "-//w3c//dtd XHTML 1.1//en" "Http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" >
<meta http-equiv= "x-ua-compatible" content= "ie=8"/>

X-ua-compatible failure problem