An optional PostMessageOptions object is being added to the postMessage() function for 6 of the 7 interfaces where it’s supported, specifically, DedicatedWorkerGlobalScope, Worker, ServiceWorker, ServiceWorker, and Window. This gives the function a similar interface on its definitions and allows it to be extended in the future. Since broadcastChannel.postMessage() doesn't take additional arguments (such as transfer) it is not being changed.

Demo

Documentation

Specification

Specification link


Specification currently under development in a Working Group

Status in Chromium

Blink>DOM


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.

Owner

Last updated on 2020-11-09