Service Worker: Client.postMessage() and ServiceWorkerMessageEvent

Category: Service Worker
Type: New or changed feature
Status: Enabled by default (Chrome 45)
Intent stage: None

Summary

Before Chrome 45, a Service Worker sending a message via Client.postMessage() results in a MessageEvent fired on the Client's global scope (e.g., window). Since Chrome 45, the event is a ServiceWorkerMessageEvent fired on navigator.serviceWorker rather than window. Until Chrome 45, Client.postMessage displayed an "experimental, may change" deprecation warning.

Standards & signals

Specification: https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#serviceworkermessage-event-section
Firefox: Positive
Safari: No signal
Web developers: No signals
Tracking bug: https://code.google.com/p/chromium/issues/detail?id=498596

Docs: https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerMessageEvent https://developer.mozilla.org/en-US/docs/Web/API/Client/postMessage

Samples: https://googlechrome.github.io/samples/service-worker/post-message/index.html

View on chromestatus.com