Node.js MessageChannel.postMessage() Method

The MessageChannel.postMessage() method is an inbuilt application programming interface of class Worker within worker_threads module which is used to send the message from one port to another.

Syntax:

const MessageChannel.postMessage(value[, transferList])

Parameters: This method takes the value as a parameter which can contain any kind of object.

Return Value: This method sends the message from one port to another.

Example 1: Filename: index.js

Output:

received data in port1 :
{ message: { hello: 'world2' } }
received data in port2 :
{ message: { hello: 'world1' } }

Example 2: Filename: index.js

Output:

GFG
closed!

Run the index.js file using the following command:

node index.js

Reference: https://nodejs.org/dist/latest-v12.x/docs/api/worker_threads.html#worker_threads_port_postmessage_value_transferlist