前端

1. html部分

<div class="container">
        <h2 class="text-center">在线聊天室</h2>
        <p>昵称:{{nickName}}</p>
        <form action="" class="form-horizontal">
            <div class="form-group">
                <div class="chat-list form-control">
                    <p v-for="item in chatList">{{item.nickName}} : {{item.content}}</p>
                </div>
            </div>
            <div class="form-group">
                <div class="col-sm-11">
                    <input type="text" class="form-control" v-model="content" placeholder="请输入内容">
                </div>
                <button class="btn btn-primary col-sm-1" @click.prevent="send">发送</button>
            </div>
        </form>
    </div>

2.js部分

<script src="vue.js"></script>
    <script>
        new Vue({
            el: ".container",
            mounted: function () {
                this.nickName = prompt("input your name")
                this.ws = new WebSocket("ws://localhost:3000")
                this.ws.onopen = function () {
                    console.log("连接成功")
                }
                var _this = this
                this.ws.onmessage = function (ev) {
                    var item = JSON.parse(ev.data)
                    _this.chatList.push(item)
                }
            },
            data: {
                ws: null,
                nickName: "",
                chatList: [],
                content: ""
            },
            methods: {
                send() {
                    var data = {
                        nickName: this.nickName,
                        content: this.content
                    }
                    //将信息发送到后端
                    this.ws.send(JSON.stringify(data))
                }
            }
        })
    </script>

后端

//引入ws模块
var webSocket = require('ws')

var wss = new webSocket.Server({port:3000})
//监听客户端的连接事件
wss.on("connection",function(ws){
    console.log("新用户连接") 
    //接收前端的信息
    ws.on("message",function(data){
        wss.clients.forEach(function(client){
            //将信息广播
            client.send(data)
        })
    })  
})

console.log("websocket server is running")