How do I implement Pub/Sub in Node.js?

How do I implement Pub/Sub in Node.js?

To implement Pub/Sub in Node.js, you can use libraries like 'node-pubsub' or 'Redis'. Which one would you prefer?

I think I'll go with Redis. How do I set it up?

First, install Redis and the 'redis' package using npm. Then, you can create a publisher and subscriber using the Redis client.

Can you show me a code example?

Sure! 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!');

That looks great! How do I handle multiple channels?

You can subscribe to multiple channels by calling subscriber.subscribe('channel1', 'channel2') and handle messages in the same way.