XHR now uses the response URL rather than the request URL for responseURL and responseXML. These are only different if a service worker provided the response. If the service worker does respondWith(fetch(url)), then responseURL is url and responseXML.URL is url.


Specification link

Specification being incubated in a Community Group

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • Positive
  • No signal
  • No signals


Last updated on 2021-12-13