Problem/Motivation

The X-UA-Compatibleheader allows indicating to Internet Explorer that it should render the page in the document mode for a previous version of Internet Explorer. Setting the value to IE=edge ensures that the page is rendered in standards mode when a valid DOCTYPE is not provided, but otherwise has no effect.

With Drupal 9 only supporting IE 11, and Drupal 10 no longer supporting IE, this header can be removed.

@see
https://docs.microsoft.com/en-us/openspecs/ie_standards/ms-iedoco/380e24...
https://docs.microsoft.com/en-ca/previous-versions/windows/internet-explorer/ie-developer/dev-guides/bg182625(v=vs.85)#document-mode-changes

Steps to reproduce

Proposed resolution

Remove setting X-UA-Compatible from FinishResponseSubscriber

Remaining tasks

Release notes snippet

Issue fork drupal-3214211

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Comments

gapple created an issue. See original summary.

gapple’s picture

gapple
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Issue summary: View changes
Status: Active » Needs review

gapple opened merge request !675

Version: 9.3.x-dev » 9.4.x-dev

Drupal 9.3.0-rc1 was released on November 26, 2021, which means new developments and disruptive changes should now be targeted for the 9.4.x-dev branch. For more information see the Drupal core minor version schedule and the Allowed changes during the Drupal core release cycle.

gapple’s picture

gapple
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Parent issue: » #3252084: [meta] Remove support for Internet Explorer

Setting meta issue as parent

longwave’s picture

longwave
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Status: Needs review » Reviewed & tested by the community

No other instances of X-UA-Compatible in core, so this is straightforward.

longwave’s picture

longwave
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Version: 9.4.x-dev » 10.0.x-dev

But we can only do this in 10.0.x :)

alexpott’s picture

alexpott
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Status: Reviewed & tested by the community » Fixed

Committed 4c6d65d and pushed to 10.0.x. Thanks!

  • alexpott committed 4c6d65d on 10.0.x 
    Issue #3214211 by gapple, longwave: Stop setting X-UA-Compatible header

Status: Fixed » Closed (fixed)

Automatically closed - issue fixed for 2 weeks with no activity.