This is a test of the pub/sub functionality of bun.
Its just the example from the bun docs, but with a few extra lines to make it work.
I added some console logs to the index.ts file to understand how it works.
- You must be subscribed to a channel to be able to publish via
ws.publish(channel, msg)
. - Your own Websocket will not receive the message you publish via
ws.publish(channel, msg)
.- Make sure to display the message for yourself as well if you want to see it.
- To publish a message without being subscribed, use
server.publish(channel, msg)
. (I think this might even be a bug, but its good that its there.) - Use
server.publish(channel, msg)
to send a message to all subscribers of a channel.- This works even if you are not subscribed to the channel yourself.
Try it in web console with
let ws1 = new WebSocket("ws:https://localhost:3000");
let ws2 = new WebSocket("ws:https://localhost:3000");
let ws3 = new WebSocket("ws:https://localhost:3000");
ws1.onmessage = (e) => console.log(`Websocket 1: ${e.data}`);
ws2.onmessage = (e) => console.log(`Websocket 2: ${e.data}`);
ws3.onmessage = (e) => console.log(`Websocket 2: ${e.data}`);
setTimeout(() => ws1.send("Hello from Websocket1"), 1000);
setTimeout(() => ws2.send("Hello from Websocket2"), 2000);
setTimeout(() => ws3.send("Hello from Websocket3"), 3000);
To install dependencies:
bun install
To run:
bun run index.ts
This project was created using bun init
in bun v1.0.4. Bun is a fast all-in-one JavaScript runtime.