BroadcastChannel: BroadcastChannel() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨March 2022⁩.

Note: This feature is available in Web Workers.

The BroadcastChannel() constructor creates a new BroadcastChannel and connects it to the underlying channel.

Syntax

new BroadcastChannel(channelName)

Parameters

channelName: A string representing the name of the channel; there is one single channel with this name for all browsing contexts with the same origin.

Examples

// create a new channel listening to the "internal_notification" channel.

const bc = new BroadcastChannel("internal_notification");
bc.postMessage("New listening connected!");