vue使用websocket的方法实例分析

mounted(){ console.log(this)----------------------------------------------------------this指向vue this.initWebpack();},methods: {  initWebpack() {    let websocket = '';    if ('WebSocket' in window) {      websocket = new WebSocket("ws://192.168.1.99:8080/tv/websocket");    } else {      alert('当前浏览器 Not support websocket')    } //连接成功建立的回调方法 websocket.onopen = function () { console.log("WebSocket连接成功")    console.log(this)----------------------------------------------------------this指向websocket  };//接收到消息的回调方法websocket.onmessage = function (event) {console.log(this)console.log(event); this.productinfos=JSON.parse(event.data);//websocket请求过来的是string 需要格式 if(demo.offsetHeight<demo1.offsetHeight){//内部比外部高度大的时候滑动this.upScroll()//这是this指向websocket 所以没有此方法 会报错}this.sliceArray() } } };//连接关闭的回调方法 websocket.onclose = function () {console.log("WebSocket连接关闭");};//连接发生错误的回调方法 websocket.onerror = function () {console.log("WebSocket连接发生错误");};//监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。 window.onbeforeunload = function () {websocket.close();//关闭WebSocket连接 }; },sliceArray(){//截取数组的后四位 }, upScroll(){ },}

methods:{ initWebpack(){//初始化websocket  const wsuri = "ws地址";  this.websock = new WebSocket(wsuri);//这里面的this都指向vue  this.websock.onopen = this.websocketopen;  this.websock.onmessage = this.websocketonmessage;  this.websock.onclose = this.websocketclose;  this.websock.onerror = this.websocketerror; }, websocketopen(){//打开  console.log("WebSocket连接成功") }, websocketonmessage(e){ //数据接收  console.log(e)  this.productinfos = JSON.parse(e.data); }, websocketclose(){ //关闭  console.log("WebSocket关闭"); }, websocketerror(){ //失败  console.log("WebSocket连接失败"); },}