在这之前用node.js的环境配置
1、在app.js中设置引入socket.io文件
var express = require('express');
var app = express();
var server = require('http').Server(app);(自己添加的)
var io = require('socket.io')(server);(自己添加的)
2、在index.html中写入输入框和要用的按钮
html代码片段
<input type="" name="" id="info">
<button type="" id="btn2">登录</button>
<button id="btn">发送</button>
<ul id="ul"></ul>
js代码片段
var socket = io.connect('http://localhost:9000');
var username = ""
btn2.onclick = function(){
username = info.value;
socket.emit("login",username)
info.value =""
}
btn.onclick = function(){
socket.emit("info",info.value);
info.value =""
}
socket.on('msg', function (name,data) {
var node = document.createElement("li")
if(name == username){
node.style.textAlign = "right"
}
node.innerHTML = name+":"+data;
ul.appendChild(node);
});
3、在app.js中监听并广播html发送过来的数据
io.on('connection', function (socket) {
socket.on("login",function(username){
socket.name = username;
});
socket.on('info', function (data) {
//console.log(data);
io.emit("msg",socket.name,data)
});
});
server.listen(9000);
4、在cmd命令行中执行nodemon app.js
在浏览器中打开localhost:9000
