I just follow the tutorial in https://youtu.be/FduLSXEHLng?t=302, as below

const WebSocket = require("ws");

const wss = new WebSocket.Server({ port: 8082 });

wss.on("connection", ws => {
    console.log("New client connected");

    ws.on("close", () => {
        console.log("Client has disconnected!")
    })
})

When I run it with node index.js, it seems to just end immediately (i.e. back to the prompt).

Anything wrong from my end? How can I check what terminate it? (or is it not terminated, but just the prompt showing?)

Sorry, I'm new to node.js and ws. Any guide on how can I debug from there will be great!

** Update ** After adding console.log("Hello");

const WebSocket = require("ws");

const wss = new WebSocket.Server({ port: 8082 });

console.log("Hello");

wss.on("connection", ws => {
    console.log("New client connected");

    ws.on("close", () => {
        console.log("Client has disconnected!")
    })
})

Then it seems to stay there.

CodePudding user response：

I suggested to you check the oroginal documentation. Here is the Link

https://github.com/theturtle32/WebSocket-Node

<iframe name="sif1" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe> good luck :)

CodePudding user response：

Your implementation is correct and worked for me. I've tested it with a client and it's connected nicely.

To realize the cause of onclose and onerror methods with the WebSocket, you can pass an event parameter to the callback function and log it out.

const WebSocket = require("ws");

const wss = new WebSocket.Server({ port: 8082 });

console.log("Hello");

wss.on("connection", ws => {
    console.log("New client connected");

    ws.on("close", (event) => {
        console.log("Websocket on close", event)
    })

    ws.on("error", (event) => {
        console.log("Websocket on error", event)
    })
})