How we built it

Blocking sync XHR during microtask execution (removed)

Certain blocking APIs spin up nested message loops. Invoking those APIs during microtask execution has undesirable effects, e.g., it is possible that events are dispatched during microtasks. Those APIs currently are alert, prompt, confirm, print, and send() on synchronous XHRs.


Status in Chromium

Removed (launch bug) in:

  • Chrome for desktop release 54
  • Chrome for Android release 54
  • Android WebView release 54
  • Opera release 41
  • Opera for Android release 41

Consensus & Standardization

  • Public support
  • No public signals
  • No public signals
  • No signals


Last updated on 2016-07-14