Communicating between 2 tabs opens up exciting opportunities while creating web applications. Before we dive into its use cases, let's learn to send and receive messages between two tabs.

We should instantiate BroadcastChannel with a channel_name as a parameter:

After instantiating, we can listen for event message

we can use postMessage method, to broadcast the message to all the tabs connected to the same channel

Some of the use cases of this are:

Detect user actions in other tabs
Know when a user logs into an account in another window/tab.
Instruct a worker to perform some background work
Know when a service is done performing some action.

Example: If use logouts in one tab, we can automatically logout user in all the tabs

This article was originally published on https://dev.anjalbinayak.com.np/js-broadcast-channel-api