- * {
- margin: 0;
- padding: 0;
- }
-
- ul{
- list-style: none;
- }
-
- .w {
- width: 900px;
- margin: 0 auto;
- }
-
- .controls textarea {
- width: 878px;
- height: 100px;
- resize: none;
- border-radius: 10px;
- outline: none;
- padding-left: 20px;
- padding-top: 10px;
- font-size: 18px;
- }
-
- .controls {
- overflow: hidden;
- }
-
- .controls div {
- float: right;
- }
-
- .controls div span {
- color: #666;
- }
-
- .controls div .useCount {
- color: red;
- }
-
- .controls div button {
- width: 100px;
- outline: none;
- border: none;
- background: rgb(0, 132, 255);
- height: 30px;
- cursor: pointer;
- color: #fff;
- font: bold 14px '宋体';
- transition: all 0.5s;
- }
-
- .controls div button:hover {
- background: rgb(0, 225, 255);
- }
-
- .controls div button:disabled {
- background: rgba(0, 225, 255, 0.5);
- }
-
- .contentList {
- margin-top: 50px;
- }
-
- .contentList ul {
- height: 800px;
- }
-
- .contentList li {
- /* display: none; */
- padding: 20px 0;
- border-bottom: 1px dashed #ccc;
- height: 60px;
- }
-
- .contentList li a {
- margin-left: 800px;
- }
- html>
- <html lang="en">
-
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <meta http-equiv="X-UA-Compatible" content="ie=edge">
- <title>Documenttitle>
- <link rel="stylesheet" href="./css/weibo.css">
- <script src="../发布微博案例/jquery-3.7.1.min.js">script>
- head>
-
- <body>
- <div class="w">
- <div class="controls">
- <img src="images/tip.png" alt=""><br>
- <textarea placeholder="说点什么吧..." id="area" cols="30" rows="10" maxlength="200">textarea>
- <div>
- <span class="useCount">0span>
- <span>/span>
- <span>200span>
- <button id="send">发布button>
- div>
- div>
- <div class="contentList">
- <ul id="list">
- ul>
- div>
- div>
- <script src="./index.js">script>
- body>
-
- html>
- const user=[{usname:'未命名',imgSrc:'images/03.jpg'}]
- let textarea=document.querySelector('textarea')
- let useCount=document.querySelector('.useCount')
- let btn=document.querySelector('#send')
- let ul=document.querySelector('#list')
- //检测输入字数:
- textarea.addEventListener('input',function(){
- useCount.innerHTML=this.value.length
- })
- btn.addEventListener('click',function(){
- //输入不能为空
- if(textarea.value.trim()==='')
- {
- return alert('内容不能为空')
- }
- function getrandom(min,max){
- return Math.floor(Math.random()*(max-min+1))+min
- }
- let a=getrandom(0,user.length-1)
- // 新增留言 应写在点击事件内部
- // 创建一个小li 然后里面通过innerHTML追加数据
- let li=document.createElement('li')
- li.innerHTML=`
- ${user[a].imgSrc}>
- ${user[a].usname}
-
- ${textarea.value}
- ${new Date().toLocaleString()}`
- //删除
- let del = li.querySelector('.del');
- del.addEventListener('click', function () {
- ul.removeChild(li);
- });
- //
- ul.insertBefore(li, ul.children[0]);
- textarea.value = '';
- useCount.innerHTML = 0;
-
- })
- //再按下回车同时发送
- textarea.addEventListener('keyup',function(a){
- if(a.key === 'Enter'){
- btn.click()
- }
- })