在Vue3中使用Websocket可以让我们轻松地实现实时数据传输。为了方便使用，我们可以封装一个好用的Websocket类。

安装依赖

首先我们需要安装 ws 库来处理Websocket连接，使用以下命令进行安装：

npm install ws --save 

 使用ts+vue3封装组件

import { onUnmounted } from 'vue';  //设置 interface SocketOptions {   //心跳间隔   heartbeatInterval?: number;   //超时重传   reconnectInterval?: number;   //最大重传次数   maxReconnectAttempts?: number; }  class Socket {   //路径   url: string;   ws: WebSocket | null = null;   opts: SocketOptions;   //重传次数   reconnectAttempts: number = 0;   listeners: { [key: string]: Function[] } = {};   //心跳间隔   heartbeatInterval: number | null = null;   //构造函数   constructor(url: string, opts: SocketOptions = {}) {     this.url = url;     this.opts = {       //心跳间隔       heartbeatInterval: 30000,       //超时重传       reconnectInterval: 5000,       //最大重传次数       maxReconnectAttempts: 5,       ...opts     };      this.init();   }   //初始化   init() {     this.ws = new WebSocket(this.url);     this.ws.onopen = this.onOpen.bind(this);     this.ws.onmessage = this.onMessage.bind(this);     this.ws.onerror = this.onError.bind(this);     this.ws.onclose = this.onClose.bind(this);   }   //打开   onOpen(event: Event) {     console.log('WebSocket opened:', event);     this.reconnectAttempts = 0;     this.startHeartbeat();     this.emit('open', event);   }   //收到的WebSocket消息   onMessage(event: MessageEvent) {     // console.log('WebSocket message received:', event.data);     this.emit('message', event.data);   }   //错误   onError(event: Event) {     console.error('WebSocket error:', event);     this.emit('error', event);   }   //重连逻辑中，在连接失败后自动重新连接   onClose(event: CloseEvent) {     console.log('WebSocket closed:', event);     this.stopHeartbeat();     this.emit('close', event);     //重连逻辑中，在连接失败后自动重新连接，但会限制重连的次数和每次重连之间的间隔时间     if (this.opts.maxReconnectAttempts !== 0 && this.reconnectAttempts < this.opts.maxReconnectAttempts!) {       setTimeout(() => {         // console.log("我有错误了1111111111111111111111111111111111111");         this.reconnectAttempts++;         this.init();       }, this.opts.reconnectInterval);     }   }   //开始心跳检测   startHeartbeat() {     if (!this.opts.heartbeatInterval) return;      this.heartbeatInterval = window.setInterval(() => {       if (this.ws?.readyState === WebSocket.OPEN) {         this.ws.send('ping');       }     }, this.opts.heartbeatInterval);   }   //停止心跳检测   stopHeartbeat() {     if (this.heartbeatInterval) {       clearInterval(this.heartbeatInterval);       this.heartbeatInterval = null;     }   }   //发送消息   send(data: string) {     if (this.ws?.readyState === WebSocket.OPEN) {       this.ws.send(data);     } else {       console.error('WebSocket is not open. Cannot send:', data);     }   }   //事件监听器注册功能的实现   on(event: string, callback: Function) {     if (!this.listeners[event]) {       this.listeners[event] = [];     }     this.listeners[event].push(callback);   }   //从事件监听器中移除   off(event: string) {     if (this.listeners[event]) {       delete this.listeners[event];     }   }   //在事件监听器中触发一个指定的事件   emit(event: string, data: any) {     this.listeners[event]?.forEach(callback => callback(data));   } }  export function useSocket(url: string, opts?: SocketOptions) {   const socket = new Socket(url, opts);    onUnmounted(() => {     socket.off('open');     socket.off('message');     socket.off('error');     socket.off('close');     socket.ws?.close(); // 关闭WebSocket连接     });    return {     socket,     send: socket.send.bind(socket),     on: socket.on.bind(socket),     off: socket.off.bind(socket)   }; }

使用

import { useSocket } from "../../utils/websocket";  const { socket, send, on, off } = useSocket(   `ws://192.168.22.32:8000/v1/user/chats` );   on("close", () => console.log("Socket closed!"));   //webSocket连接上服务器时   on("open", event => {     console.log("webSocket连接上服务器时", event);   }); socket.on("message", data => { console.log("Received data:", data); }）      send(xxxx);