Restrict usage of synchronous XMLHttpRequest by feature policy

Issue #16194090 • Assigned to Travis L.


Mar 2, 2018
This issue is public.
Reported by 1 person

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Steps to reproduce

XMLHttpRequest objects can have their behavior controlled by feature policy
(, not merged yet)

If the policy in the active document disallows the ‘sync-xhr’ feature, then calling .send() on the XMLHttpRequest object should throw a NetworkError (and ideally log a message to the developer console)

GitHub issue:
Web Platform Tests:

(I didn’t see feature policy itself on the features roadmap, so I posted


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Steven K.”

      Changed Assigned To to “Travis L.”

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