vue项目中使用websocket

<template>
    <div>
        <button @click="send">发消息</button>
    </div>
</template>

<script>
export default {
  data () {
    return {
      path: 'ws://192.168.1.177:17750/imserver/',
      socket: ''
    }
  },
  computed:{
    userId(){
      let userId = this.$store.getters.id;
      return userId
    }
  },
  watch(){
    //监听userid，获取到了再执行websocket连接
      userId(){
        // 初始化
        this.init()
      }
  },
  methods: {
    init() {
      if(typeof(WebSocket) === "undefined"){
        alert("您的浏览器不支持socket")
      }else{
        if(!this.userId){
          alert('用户ID获取失败导致WebSocket连接失败！');
        }else{
          const path = this.path + this.userId;
          // 实例化socket
          this.socket = new WebSocket(path)
          // 监听socket连接
          this.socket.onopen = this.open
          // 监听socket错误信息
          this.socket.onerror = this.error
          // 监听socket消息
          this.socket.onmessage = this.getMessage
          // 监听socket关闭
          this.socket.onclose = this.close;
        }
      }
    },
    open() {
      console.log('socket连接成功')
    },
    error() {
      console.log('连接错误')
    },
    getMessage(msg) {
      console.log('收到消息',msg);
    },
    send() {
      this.socket.send()
    },
    close() {
      console.log("socket已经关闭")
    }
  },
  // 销毁监听
  destroyed(){
    if(this.socket){
      this.socket.close();
    }
  }
}
</script>