For users on slow connections such as 2G, the performance penalty from third-party scripts loaded via document.write is often so severe as to delay display of main page content for tens of seconds. This feature will block the load of cross-origin, parser-blocking scripts inserted via document.write in case of an HTTP cache miss for users on a 2G connection. The feature will only be applicable to such scripts in the main frame.

Documentation

Specification

Public discussion

Status in Chromium

Blink


Browser Intervention (tracking bug) in:

  • Chrome for desktop release 55
  • Chrome for Android release 55
  • Chrome for iOS release 55
  • Android WebView release 55

Consensus & Standardization

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

  • No signal
  • No signal
  • No signal
  • Positive

Owners

Search tags

intervention,

Last updated on 2021-03-19