How can I implement a pub/sub system using Node.js?

How can I implement a pub/sub system using Node.js?

You can implement a pub/sub system in Node.js using libraries like Redis, MQTT, or even native EventEmitter. Which one are you interested in?

I think Redis would be a good choice. How do I set it up?

To set up Redis for pub/sub, first install the Redis client for Node.js using npm. Then, you can create a publisher and a subscriber. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

const redis = require('redis');

const publisher = redis.createClient();
const subscriber = redis.createClient();

subscriber.on('message', (channel, message) => {
    console.log(`Received message from ${channel}: ${message}`);
});

subscriber.subscribe('my-channel');

publisher.publish('my-channel', 'Hello, World!');