node启动websocket保持后台一直运行的方法

//cmd
 
mkdir websocket-server  
cd websocket-server  
npm init -y

//cmd
npm install ws

//javascript
 
const WebSocket = require('ws');  
 
const wss = new WebSocket.Server({ port: 8080 });  
 
wss.on('connection', (ws) => {  
    console.log('New client connected');  
 
    ws.on('message', (message) => {  
        console.log(`Received: ${message}`);  
        // Echo the message back to the client  
        ws.send(`You said: ${message}`);  
    });  
 
    ws.on('close', () => {  
        console.log('Client disconnected');  
    });  
});  
 
console.log('WebSocket server is running on ws://localhost:8080');

//cmd
 
npm install -g pm2

//cmd
 
 
pm2 start server.js --name websocket-server

//cmd
pm2 list

//cmd
pm2 stop websocket-server

//cmd
pm2 delete websocket-server

//javascript
const ws = new WebSocket('ws://localhost:8080');  
  
ws.onopen = () => {  
    console.log('Connected to WebSocket server');  
    ws.send('Hello, server!');  
};  
  
ws.onmessage = (event) => {  
    console.log(`Message from server: ${event.data}`);  
};  
  
ws.onclose = () => {  
    console.log('Disconnected from WebSocket server');  
};