先安裝 sockjs-client 和 stompjs

npm install sockjs-client
npm install stompjs　

import SockJS from  'sockjs-client';
import  Stomp from 'stompjs';
export default {
    data(){
        return {
            stompClient:'',
            timer:'',
        }
    },
    methods:{
        initWebSocket() {
            
 
this.connection();
            let that= this;
            // 斷開重連機制,嘗試傳送訊息,捕獲異常發生時重連
            this.timer = setInterval(() => {
                try {
                    that.stompClient.send("test");
                } catch (err) {
                    console.log("斷線了: " + err);
                    that.connection();
                }
            }, 
 
5000);
        },  
        connection() {
            // 建立連線物件
            let socket = new SockJS('http://10.10.91.4:8081/ws');
            // 獲取STOMP子協議的客戶端物件
            this.stompClient = Stomp.over(socket);
            // 定義客戶端的認證資訊,按需求配置
            let headers = {
                Authorization:''
            }
            
 
// 向伺服器發起websocket連線
            this.stompClient.connect(headers,() => {
                this.stompClient.subscribe('/topic/public', (msg) => { // 訂閱服務端提供的某個topic
                    console.log('廣播成功')
                    console.log(msg);  // msg.body存放的是服務端傳送給我們的資訊
                },headers);
                this.stompClient.send("/app/chat.addUser",
                    headers,
                    JSON.stringify({sender: '',chatType: 'JOIN'}),
                )   //使用者加入介面
            }, (err) => {
                // 連線發生錯誤時的處理函式
                console.log('失敗')
                console.log(err);
            });
        },    //連線 後臺
        disconnect() {
            if (this.stompClient) {
                this.stompClient.disconnect();
            }
        },  // 斷開連線
    },
    mounted(){
        this.initWebSocket();
    },
    beforeDestroy: function () {
        // 頁面離開時斷開連線,清除定時器
        this.disconnect();
        clearInterval(this.timer);
    }
}
 

轉載：紫藤蘿yu的《vue使用SockJS實現webSocket通訊》