Notifies the receiver when a posted message could not be decoded. Currently its only use is when a SharedArrayBuffer cannot be shared. There are also plans to use it for other objects (WebAssembly modules, for example). The messageerror event and associated onmessageerror handler attaches to windows, message ports, broadcast channels, and workers.




Specification link

Specification being incubated in a Community Group

Status in Chromium


In development (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 2021-10-25