Add X-UA-Compatible HTTP header

Posted by JohnAlbin on April 1, 2012 at 8:42am

Project:

Drupal core

Introduced in branch:

8.x

Issues:

#1203112: Add X-UA-Compatible HTTP header

Description:

We now send the X-UA-Compatible HTTP header to force IE to use the most recent rendering engine or use Chrome's frame rendering engine if available.

This also prevents the IE compatibility mode button to appear if certain markup makes IE think it is dealing with legacy pages (such as when using IE conditional classes on the html tag.)

This is the HTTP header that now appears in Drupal 8:

X-UA-Compatible: IE=edge,chrome=1

Impacts:

Site builders, administrators, editors

Themers

Updates Done (doc team, etc.)

Online documentation:

Not done

Theming guide:

Not done

Module developer documentation:

Not done

Examples project:

Not done

Coder Review:

Not done

Coder Upgrade:

Not done

Other:

Other updates done