<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.content{width: 500px;margin: 0 auto;background-color: blue;padding-top: 20px;padding-bottom: 20px}
.chat{width:400px;margin: 0 auto;height: 400px;background-color: #fff;}
.send{width:400px;margin: 0 auto;margin-top: 20px;}
.clear{overflow: hidden}
textarea{resize: none;width: 270px;height: 50px;float: left}
button{width: 120px;height: 55px;float: right;font-size: 20px}
li{list-style: none;margin-top: 10px}
li img{display: inline}
</style>
</head>
<body>
<div class="content">
<!--聊天区-->
<div class="chat"><ul></ul></div>
<!--发送区-->
<div class="send clear">
<textarea></textarea>
<button id="send">发送</button>
</div>
</div>
<script>
window.onload=function () {
var sum=0;
var send=document.querySelector('#send');
var ul=document.querySelector('ul');
var info=[
'hello,worde',
'我饿了',
'我要吃饭',
'你不是好人',
'pbp指纹锁',
'我要回家 ',
'城市太露',
'我要回老家'
]
send.onclick=function () {
var tc=document.querySelector('textarea').value;
var li=document.createElement('li');
li.innerHTML="<img src=\"a.png\"/ style=\"border-radius:50%;width:25px;height:25px\">"+tc;
ul.appendChild(li);
sum++;
setTimeout(function () {
//获取info的随机数据
var one=info[Math.floor(Math.random()*7)];//Math函数
var li0=document.createElement('li');
li0.innerHTML="<img src=\"b.png\"/ style=\"border-radius:50%;width:25px;height:25px\">"+one;
ul.appendChild(li0);
sum++;
if (sum>10){
ul.innerHTML='';
sum=0;
}
},2000)
}
}
</script>
</body>
</html>