How to use JavaScript and WebSocket to achieve real-time online home purchase consultation

How to use JavaScript and WebSocket to achieve real-time online home purchase consultation

Introduction:
With the development of the Internet, online shopping has become indispensable in our lives a part of. In order to further enhance user shopping experience, more and more websites are beginning to introduce real-time online consultation functions so that users can instantly obtain product information and communicate with customer service. This article will introduce how to use JavaScript and WebSocket technology to achieve real-time online home purchase consultation. I hope readers can learn about relevant development methods and techniques through this article.

1. Understand WebSocket technology
WebSocket is a brand new communication protocol in HTML5. Different from the traditional HTTP protocol, WebSocket allows real-time two-way communication between the server and the client. Traditional HTTP requests can only be initiated by the client, and the server cannot actively send data to the client. However, with WebSocket, the server can send data to the client at any time after the online connection is established. This gives WebSocket a great advantage when implementing real-time communication functions.

2. Build a WebSocket server
Before realizing the real-time online house purchase consultation function, we need to build a WebSocket server first. WebSocket servers can be implemented using various programming languages, such as Java, Node.js, etc. This article takes Node.js as an example. The specific code implementation is as follows:

// 导入WebSocket模块
const WebSocket = require('ws');
 
// 创建WebSocket服务器
const wss = new WebSocket.Server({ port: 8080 });
 
// 监听连接事件
wss.on('connection', function connection(ws) {
  // 监听消息事件
  ws.on('message', function incoming(message) {
    console.log('received: %s', message);
    
    // 处理消息并向客户端发送响应
    ws.send('Hello, ' + message);
  });
});

The above code creates a WebSocket server and monitors message events after the connection is established. When a client sends a message, the server receives and processes the message and sends a response to the client.

3. Real-time online house purchase consultation function
After setting up the WebSocket server, we can introduce JavaScript code into the website to realize the real-time online house purchase consultation function. The specific code implementation is as follows:

// 创建WebSocket连接
const ws = new WebSocket('ws://localhost:8080');
 
// 监听连接事件
ws.onopen = function() {
  console.log('WebSocket连接已建立');
};
 
// 监听消息事件
ws.onmessage = function(event) {
  console.log('received: %s', event.data);
  
  // 处理消息并展示在网页上
  const message = document.createElement('div');
  message.innerHTML = event.data;
  document.body.appendChild(message);
};
 
// 监听关闭事件
ws.onclose = function() {
  console.log('WebSocket连接已关闭');
};
 
// 提交表单并发送消息
const form = document.querySelector('form');
form.addEventListener('submit', function(event) {
  event.preventDefault();
  
  const input = document.querySelector('input');
  const message = input.value;
  
  // 向服务器发送消息
  ws.send(message);
  
  input.value = '';
});

The above code creates a WebSocket connection and listens to connection events, message events and closing events. When the connection is established, messages can be submitted through the form and the messages returned by the server are displayed on the web page.

Conclusion:
Through the above code examples, we can use JavaScript and WebSocket technology to implement real-time online house purchase consultation function. Through the construction of the WebSocket server and interaction with the web page, users can communicate with customer service in real time and obtain instant product information and consulting services. I hope this article will be helpful to readers so that they can better apply JavaScript and WebSocket technology to realize real-time online home purchase consultation function.

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