<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>DOM实战:模拟在线客服系统</title>
<style>
div:nth-child(1){width: 450px;height: 650px;background: lightskyblue;
margin: 30px auto;color: #333;box-shadow: 2px 2px 2px #808080;}
h2{text-align: center;margin-bottom: -10px;}
div:nth-child(2){width: 400px;height: 500px;border: 4px double green;
background: #efefef;margin: 20px auto 10px; }
ul{list-style-type: none;line-height: 2em;overflow: hidden;padding: 15px;}
table{width: 90%;height: 80px;margin: auto;}
textarea{border:0;resize: none;background: lightyellow;}
button{width: 60px;height: 40px;background: seagreen;color: white;border:0;}
button:hover{cursor: pointer;background: orange;}
li span{background: #ff6800;}
</style>
</head>
<body>
<div>
<h2>在线客服</h2>
<div>
<ul>
<li></li>
</ul>
</div>
<table>
<tr>
<td><textarea name="text" cols="50" rows="4"></textarea></td>
<td align="left"><button type="button">发送</button></td>
</tr>
</table>
</div>
</body>
</html>
<script>
// 获取到页面中相关元素
let btn = document.getElementsByTagName('button')[0];
let text = document.getElementsByName('text')[0];
let ul = document.getElementsByTagName('ul')[0];
let sum = 0; // 计数器初始化
// 添加点击事件,获取用户信息并发送到窗口
btn.onclick = function(){
let msg = text.value; // 获取用户提交的信息内容并保存到变量中
text.value = '';
// 创建一个li元素存放发送的信息
let li = document.createElement('li');
// 用户头像
let Img = '<img src="images/2.jpg" width="30" style="border-radius:50%;margin-left:0px;">';
li.innerHTML = '<span style="background:lightgreen;margin-left:70%;"> '+msg+'</span>'+Img;
ul.appendChild(li);
sum += 1;
// 自动回复信息
setTimeout(function(){
let info = [
'200卖不卖',
'怎么没反应了',
'你还在吗?',
'价钱不好可以商量啊!',
'这样子恐怕不好吧!',
'我先转账给你,'
];
let tmp = info[Math.floor(Math.random()*5)];
let server = document.createElement('li');
let img = '<img src="images/1.jpg" width="30" style="border-radius:50%;">';
server.innerHTML = img+'<span style="background:#ccc;"> '+tmp+'</span>';
ul.appendChild(server);
sum += 1;
},2000);
}
</script>
