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留言板案例
皮皮志
Original
635 people have browsed it

html代码

  1. <!DOCTYPE html>
  2. <html lang="zh-CN">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.     <title>Document</title>
  8.     <link rel="stylesheet" href="style.css">
  9. </head>
  10. <body>
  11.     <header>
  12.         <div class="nav">
  13.             <div>留言板</div>
  14.             <div>浏览:139</div>
  15.         </div>
  16.     </header>
  17.     <main>
  18.         <div class="box">
  19.             <textarea name="message" class='message' placeholder="说些什么吧" onkeydown="print(this)"></textarea>
  20.             <div class="second">
  21.             <textarea name="name" class='name' placeholder="昵称" onkeydown="Name(this)"></textarea>
  22.             <textarea name="email" class='email' placeholder="邮箱"></textarea>
  23.             <textarea name="url" class='url' placeholder="网址"></textarea>
  24.             </div>
  25.             <button onclick="print(this.previousElementSibling.previousElementSibling)">提交</button>
  26.         </div>        
  27.     </main>
  28.     <footer>
  30.     </footer>
  31.     <script src="js.js"></script>
  32. </body>
  33. </html>

css代码

  1. *{
  2.     margin: 0;
  3.     padding: 0;
  4.     box-sizing: border-box;
  5. }
  6. body{
  7.     margin: 0 200px;
  8.     background-color: #fff;
  9.     width: 1200px;
  10. }
  11. header .nav{
  12.     margin: 50px 0 0 20px;
  13.     display: grid;
  14.     grid-template-columns: 100px 100px;
  15.     gap: 10px;
  16. }
  17. header .nav div{
  18.    background-color: skyblue;
  19.    border-radius: 20px;
  20.    width: 80px;
  21.    height: 50px;
  22.    text-align: center;
  23.    line-height: 50px;
  24. }
  25. main .box{
  26.     margin: 20px 0 0 20px;
  27.     display: grid;
  28.     grid-template-rows: 200px 50px 50px;
  29.     gap: 10px;
  30. }
  31. main .box .message{
  32.     display: block;
  33.     height: 200px;
  34.     width: 1180px;
  35.     border-radius: 10px;
  36.     background-color: skyblue;
  37.     place-items: start;
  38.     font-size: 18px;
  39. }
  40. main .box .second{
  41.     display: grid;
  42.     grid-template-columns: repeat(3,1fr);
  43.     gap:0 10px;
  44.     height: 30px;
  45. }
  46. main .box .second *{
  47.     background-color: skyblue;
  48.     border-radius: 10px;
  49.     line-height: inherit;
  50.     font-size: 22px;
  51. }
  52. footer{
  53.     margin: 20px 0 0 20px;
  54.     background-color: skyblue;
  55.     border-radius: 10px;
  56. }
  57. footer .answer{
  58.     color:red
  59. }

js代码

  1. const print = function (ele){
  2.     let arr = ["老板发财","老板有钱","老板你好","我是你爹","我是你爸爸","你吃了吗","你吃饱了吗"]
  3.     let nameArr = ["张三",'李四','王二麻子','跳跳虎','啊狗','狗蛋','驴']
  4.     if(event.key === 'Enter' || event.type ==='click'){
  5.         if(ele.value.length === 0){
  6.             alert('留言不可为空');
  7.             ele.focus()
  8.             return false
  9.         }
  10.         const div = document.querySelector('footer')
  11.         div.insertAdjacentHTML("afterbegin",`<div class="box1">
  12.         <p>当前时间:${time()}</p>
  13.         <p>${nameArr[(Math.round(Math.random()*(arr.length-1)))]}说:${ele.value}</p>
  14.         <p class="answer">平台回复:${arr[(Math.round(Math.random()*(arr.length-1)))]}</p>
  15.     </div> `)
  16.         ele.value = null
  17.     }  
  18. }
  19. const time =  function show(){
  20.     new Date(); 
  21.     setTimeout(show,1000);//定时器一直调用show()函数
  22.     return new Date();
  23. }

代码展示如下

留言

Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：很好, 效果不错, 整体没什么问题
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