Node.js 中的原生 WebSocket 客户端

// Creates a new WebSocket connection to the specified URL.
const socket = new WebSocket('ws://:8080');

// Executes when the connection is successfully established.
socket.addEventListener('open', event => {
  console.log('WebSocket connection established!');
  // Sends a message to the WebSocket server.
  socket.send('Hello Server!');
});

// Listen for messages and executes when a message is received from the server.
socket.addEventListener('message', event => {
  console.log('Message from server: ', event.data);
});

// Executes when the connection is closed, providing the close code and reason.
socket.addEventListener('close', event => {
  console.log('WebSocket connection closed:', event.code, event.reason);
});

// Executes if an error occurs during the WebSocket communication.
socket.addEventListener('error', error => {
  console.error('WebSocket error:', error);
});

const socket = new WebSocket('ws://:8080');

socket.addEventListener('open', () => {
  const data = { type: 'message', content: 'Hello from Node.js!' };
  socket.send(JSON.stringify(data));
});

socket.addEventListener('message', event => {
  try {
    const receivedData = JSON.parse(event.data);
    console.log('Received JSON:', receivedData);
  } catch (error) {
    console.error('Error parsing JSON:', error);
    console.log('Received data was:', event.data);
  }
});