abstrakt：<html><meta charset="utf-8"><head> <style type="text/css"> ul{ list-style: none; padding: 15px; overflow: hidden} &n
<html>
<meta charset="utf-8">
<head>
<style type="text/css">
ul{ list-style: none; padding: 15px; overflow: hidden}
.div1{width: 450px;height: 650px; background: #ccc; box-shadow: 2px 2px 2px #808080;margin: 30px auto;}
.div2{ width: 400px; height: 500px; background: #efefef; border: 4px double green;
margin: 5px auto;}
h1{ text-align: center}
table{ width: 90%; height: 80px; margin: auto}
button:hover{ cursor: pointer}
</style>
</head>
<body>
<div class="div1">
<h1>在線客服</h1>
<div class="div2">
<ul>
<li></li>
</ul>
</div>
<table>
<tr>
<td align="right"><textarea name="text" cols="50" rows="4"></textarea> </td>
<td align="left"> <button type="button">發(fā)送</button></td>
</tr>
</table>
</div>
<script >
//獲取頁面元素
let btn = document.getElementsByTagName("button")[0];
console.log(btn);
let text = document.getElementsByName("text")[0];
console.log(text);
let list = document.getElementsByTagName("ul")[0];
console.log(list);
let sum = 0;
//添加點擊事件，獲取用戶發(fā)送內(nèi)容添加到ul
btn.onclick = function(){
//獲取用戶內(nèi)容
if(text.value.length===0){
alert("您沒有留言！");
return false;
}
let userComment = text.value;
text.value= "";
//創(chuàng)建一個li
let li = document.createElement("li");
li.innerHTML = userComment;
//創(chuàng)建用戶頭像
let userPic = "";
list.appendChild(li);
sum+=1;
//這是定時器，自動回復(fù)
setTimeout(function(){
let info = ["您好","您需要什么？","需要退貨嗎？"];
let temp = info[Math.floor(Math.random()*3)];
let reply = document.createElement("li");
let kefuPic = "";
reply.innerHTML=kefuPic+' <span style=color: "#ff6700;">'+temp+ '</span>';
list.appendChild(reply);
sum+=1;
},2000);
//清空窗口，并將計數(shù)器清零
if(sum>15){
list.innerHTML="";
sum=0;
}
}
</script>
</body>
</html>
Korrigierender Lehrer：查無此人Korrekturzeit：2019-04-23 13:29:19
Zusammenfassung des Lehrers：完成的不錯。更多的數(shù)據(jù)存儲，等學(xué)習(xí)了php后，放到后端來存儲。繼續(xù)加油。