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2020
09-24

JavaScript实现留言板案例

本文实例为大家分享了JavaScript实现留言板功能的具体代码，供大家参考，具体内容如下

<!DOCTYPE html>
<html>
 <head>
 <meta charset="utf-8">
 <title>留言板</title>
 <style type="text/css">
 #div1{
 width: 400px;
 height: 200px;
 background-color: antiquewhite;
 }
 span{
 color: blue;
 text-decoration: underline;
 }
 </style>
 </head>
 <body>
 <div id="div1">
 姓名：<input type="text" name="user" id="username" /><br />
 内容：<textarea rows="10" cols="40" id="info">
 
 </textarea>
 <input type="button" value="留言" id="btn" /><br />
 </div>
 <h3>留言板</h3><br />
 <div id="div2">
 
 </div>
 
 
 </body>
 <script type="text/javascript">
 var userInput = document.getElementById("username");
 var infoInput = document.getElementById("info");
 var btn = document.getElementById("btn");
 var div2 = document.getElementById("div2");
 
 btn.onclick = function(){
 
 var user = userInput.value;
 var info = infoInput.value;
 
 var divUser = document.createElement("div");
 divUser.innerText = user;
 divUser.style.backgroundColor = "darkgrey";
 divUser.style.width = "400px";
 divUser.style.height = "30px";
 div2.appendChild(divUser);
 
 var divInfo = document.createElement("div");
 divInfo.innerText = info;
 divInfo.style.backgroundColor = "antiquewhite";
 divInfo.style.width = "400px";
 divInfo.style.height = "80px";
 div2.appendChild(divInfo);
 
 var del = document.createElement("span");
 del.innerText = "删除";
 del.style.float = "right";
 divInfo.appendChild(del);
 
 
 del.onclick = function(){
 divUser.remove();
 divInfo.remove();
 del.remove();
 }
 
 
 }
 
 
 </script>
</html>

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