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简易留言板的实现
安超
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765 people have browsed it

本文实现一个简易的留言板

本文的看点在于实现了留言的动态插入。
效果图如下：
留言板效果

  1.   <style>
  2.       /* 留言框 */
  3.         form fieldset{
  4.             width: 200px;
  5.         }
  6.         /* 留言区CSS */
  7.         .container{
  8.           /* border: 1px solid gray; */
  9.           max-width: 600px;
  10.         }
  11.         .container .note{
  12.           border: 1px solid burlywood;
  13.           display: grid;
  14.         }
  15.         .container .note div:last-of-type{
  16.           text-align: right;
  17.           font-size: x-small;
  18.           font-family: 'Courier New', Courier, monospace;
  19.         }
  20.         .container .reply{
  21.           border-bottom: 2px solid red;
  23.         }
  24.     </style>
  25. </head>
  26. <body>
  27.     <!-- 1. 改写留言板案例,适当添加CSS美化 2. (选做), 将留言板案例改成"智能客服系统",实现机器人回复 -->
  28.   <h4>意见框：</h4>
  29.   <form action="#" method="post" name="myForms_1" >
  30.     <fieldset>
  31.         <legend>请留下您的宝贵意见:</legend>
  32.   <textarea name="note" id="note" cols="30" rows="10" placeholder="留言后点击'提交'"  autofocus></textarea><br><br>
  33.   <button type="button" onclick = "tijiao()">提交</button>
  34. </fieldset>
  35.   </form>
  36.   <br>
  37.   <br>
  38.   <!-- 以下为留言区 -->
  39.   <p>留言区</p>
  40.   <div class="container">
  41.     <div class="note">
  42.       <div></div>
  43.       <div></div>
  44.     </div>
  45.     <div class="reply"></div>
  46.   </div>
  1.     // 获取form表单
  2.    let forms = document.forms.myForms_1;
  3.   //  获取留言区的DOM元素
  4.    let container = document.querySelector('.container');
  5.    let note = document.querySelector('.note');
  6.    let note_1 = note.firstElementChild;
  7.    let note_2 = note.lastElementChild;
  8.    let reply = document.querySelector('.reply');
  9.   // 留言提交函数
  10.    function tijiao(){
  11.     let trLength = note.children.length;
  12.     console.log(trLength);
  13.     console.log(forms.note.value);
  14.     let value = forms.note.value;
  15.     let date = new Date();
  16.     let time = date.getFullYear()+"年"+date.getMonth()+"月"+date.getDay()+"日"+date.getHours()+"点"+date.getMinutes()+"分";
  17.     // 将内容放到模板字面量里
  18.     let noteDiv = `<div class = "note"><div>${value}</div><div>${time}</div></div><div class="reply">"您好，你的留言已经收到"</div>`;
  19.     //  将内容插入留言区
  20.     container.insertAdjacentHTML("afterbegin",noteDiv);
  22.     forms.note.value="";
  23.    }
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：好, 一如既往, 看的出用心了, 继续加油
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