如何将数据从javascript发送到node.js TCP服务器？

const net = require('net');

const server = net.createServer((socket) => {
  // 当有客户端连接时触发
  console.log('Client connected');

  // 监听客户端发送的数据
  socket.on('data', (data) => {
    console.log('Received data:', data.toString());
  });

  // 监听客户端断开连接
  socket.on('end', () => {
    console.log('Client disconnected');
  });
});

// 监听指定的端口
const port = 3000;
server.listen(port, () => {
  console.log('Server listening on port', port);
});

const net = require('net');

// 创建TCP客户端并连接到服务器
const client = net.createConnection({ port: 3000 }, () => {
  console.log('Connected to server');

  // 发送数据到服务器
  client.write('Hello from JavaScript');
});

// 监听服务器返回的数据
client.on('data', (data) => {
  console.log('Received data from server:', data.toString());
});

// 监听与服务器的连接断开
client.on('end', () => {
  console.log('Disconnected from server');
});