新浪微博发送案例--- highlight: an-old-hope --- ![Snipaste_2022-01-20

<!DOCTYPE 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>微博发布</title>
  <style>
    * {
      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 li {
      padding: 20px 0;
      border-bottom: 1px dashed #ccc;
      position: relative;
    }

    .contentList li .info {
      position: relative;
    }

    .contentList li .info span {
      position: absolute;
      top: 15px;
      left: 100px;
      font: bold 16px '宋体';
    }

    .contentList li .info p {
      position: absolute;
      top: 40px;
      left: 100px;
      color: #aaa;
      font-size: 12px;
    }

    .contentList img {
      width: 80px;
      border-radius: 50%;
    }

    .contentList li .content {
      padding-left: 100px;
      color: #666;
      word-break: break-all;
    }

    .contentList li .the_del {
      position: absolute;
      right: 0;
      top: 0;
      font-size: 28px;
      cursor: pointer;
    }
  </style>
  <script src="js/random.js"></script>
</head>

<body>
  <div class="w">
    <!-- 操作的界面 -->
    <div class="controls">
      <img src="./images/9.6/tip.png" alt="" /><br />
      <!-- maxlength 可以用来限制表单输入的内容长度 -->
      <textarea placeholder="说点什么吧..." id="area" cols="30" rows="10" maxlength="200"></textarea>
      <div>
        <span class="useCount" id="useCount">0</span>
        <span>/</span>
        <span>200</span>
        <button id="send">发布</button>
      </div>
    </div>
    <!-- 微博内容列表 -->
    <div class="contentList">
      <ul id="list">
        <!--  <li>
          <div class="info">
            <img class="userpic" src="./images/9.5/01.jpg" />
            <span class="username">名字</span>
            <p class="send-time">发布于 时间</p>
          </div>
          <div class="content">内容</div>
          <span class="the_del">X</span>
        </li> -->
      </ul>
    </div>
  </div>

  <script>
    let dataArr = [
      { uname: '司马懿', imgSrc: './images/9.5/01.jpg' },
      { uname: '女娲', imgSrc: './images/9.5/02.jpg' },
      { uname: '百里守约', imgSrc: './images/9.5/03.jpg' },
      { uname: '亚瑟', imgSrc: './images/9.5/04.jpg' },
      { uname: '虞姬', imgSrc: './images/9.5/05.jpg' },
      { uname: '张良', imgSrc: './images/9.5/06.jpg' },
      { uname: '安其拉', imgSrc: './images/9.5/07.jpg' },
      { uname: '李白', imgSrc: './images/9.5/08.jpg' },
      { uname: '阿珂', imgSrc: './images/9.5/09.jpg' },
      { uname: '墨子', imgSrc: './images/9.5/10.jpg' },
      { uname: '鲁班', imgSrc: './images/9.5/11.jpg' },
      { uname: '嬴政', imgSrc: './images/9.5/12.jpg' },
      { uname: '孙膑', imgSrc: './images/9.5/13.jpg' },
      { uname: '周瑜', imgSrc: './images/9.5/14.jpg' },
      { uname: '老夫子', imgSrc: './images/9.5/15.jpg' },
      { uname: '狄仁杰', imgSrc: './images/9.5/16.jpg' },
      { uname: '扁鹊', imgSrc: './images/9.5/17.jpg' },
      { uname: '马可波罗', imgSrc: './images/9.5/18.jpg' },
      { uname: '露娜', imgSrc: './images/9.5/19.jpg' },
      { uname: '孙悟空', imgSrc: './images/9.5/20.jpg' },
      { uname: '黄忠', imgSrc: './images/9.5/21.jpg' },
      { uname: '百里玄策', imgSrc: './images/9.5/22.jpg' }
    ]
    // 获取元素
    let area = document.querySelector('#area')
    let useCount = document.querySelector('#useCount')
    let send = document.querySelector('#send')
    let list = document.querySelector('#list')

    // 绑定发送键
    send.addEventListener('click', function () {

      // 文本内容    .trim去除空格
      let count = area.value.trim()
      // 空文本不能发送
      if (area.value == 0) {
        return
      }
      // 创建li元素
      let li = document.createElement('li')
      // 获得一个随机数作为用户来源
      let random = parseInt(Math.random() * dataArr.length)
      // 填入li
      li.innerHTML = `<div class="info">
            <img class="userpic" src=${dataArr[random].imgSrc} />
            <span class="username">${dataArr[random].uname}</span>
            <p class="send-time">发布于 ${dateFormat()}</p>
          </div>
          <div class="content">${count}</div>
          <span class="the_del">X</span>`
      // 把li插入list
      list.insertBefore(li, list.children[0])
      //绑定删除按钮
      let the_del = document.querySelector('.the_del')
      console.log(the_del);
      the_del.addEventListener('click', function () {
        list.removeChild(li)
      })
      // 发布之后清空文本域
      area.value = ''
      useCount.innerHTML = 0
    })
    // 添加输入框检测文本内容
    area.addEventListener('input', function () {
      useCount.innerHTML = area.value.trim().length
    })
    // 
    // 获取时间，封装
    let dateFormat = function () {
      let date = new Date()
      console.log(date);
      let year = date.getFullYear()
      console.log(year);
      let month = date.getMonth() + 1
      console.log(month);
      let day = date.getDay()
      console.log(day);
      let hours = date.getHours()
      console.log(hours);
      return `${year}-${month}-${day}-${hours}`
    }
  </script>
</body>

</html>