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HowTo: Tell IE to use compatibility mode without editing your web pages

at http://www.mono-software.com/Mono/Pages/Discussion/dtopic/_YyUBIlx5kiqHaNqAQeltg/br-brake-bug-in-IE11-and-clipflair-text-editor/

one reads:

We are using Telerik’s rich text editor (RadEditor), and it seems that RadEditor has specific behaviour regarding insertion of break tags.

To circumvent this issue please try to add host header in ISS 7 (website level):

Name = "X-UA-Compatible"
Value = "IE=EmulateIE10"

Or, you can insert Html Meta tag on a PreRender event (of Page that uses RadEditor):

HtmlMeta meta = new HtmlMeta();

meta.Attributes.Add("http-equiv", "X-UA-Compatible");

meta.Attributes.Add("content", "IE=EmulateIE10");

Page.Header.Controls.Add(meta);

 

This is a very handy trick, one can open up a website at IIS console and open HTTP Response Headers node and then add the Name / Value pair X-UA-Compatible / IE=EmulateIE10 to force say Internet Explorer 11 to behave like Internet Explorer 10

To confirm it works, press F12 to show developer tools in IE11 and see at the right that it says “IE10” instead of “Edge” at the HTML engine selection dropdown list (compatibility mode).

 

Screenshot 2014-08-22 19.05.29

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