html简单实现b站评论回车发布-蒲公英云

html简单实现b站评论回车发布

心已赠人 2024-03-17 11:43 107阅读 0赞

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>评论回车发布</title>
  <style>
    .wrapper {
      min-width: 400px;
      max-width: 800px;
      display: flex;
      justify-content: flex-end;
    }
    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      overflow: hidden;
      background: url(./images/avatar.jpg) no-repeat center / cover;
      margin-right: 20px;
    }
    .wrapper textarea {
      outline: none;
      border-color: transparent;
      resize: none;
      background: #f5f5f5;
      border-radius: 4px;
      flex: 1;
      padding: 10px;
      transition: all 0.5s;
      height: 30px;
    }
    .wrapper textarea:focus {
      border-color: #e4e4e4;
      background: #fff;
      height: 50px;
    }
    .wrapper button {
      background: #00aeec;
      color: #fff;
      border: none;
      border-radius: 4px;
      margin-left: 10px;
      width: 70px;
      cursor: pointer;
    }
    .wrapper .total {
      margin-right: 80px;
      color: #999;
      margin-top: 5px;
      opacity: 0;
      transition: all 0.5s;
    }
    .list {
      min-width: 400px;
      max-width: 800px;
      display: flex;
    }
    .list .item {
      width: 100%;
      display: flex;
    }
    .list .item .info {
      flex: 1;
      border-bottom: 1px dashed #e4e4e4;
      padding-bottom: 10px;
    }
    .list .item p {
      margin: 0;
    }
    .list .item .name {
      color: #FB7299;
      font-size: 14px;
      font-weight: bold;
    }
    .list .item .text {
      color: #333;
      padding: 10px 0;
    }
    .list .item .time {
      color: #999;
      font-size: 12px;
    }
  </style>
</head>
<body>
  <div class="wrapper">
    <i class="avatar"></i>
    <textarea id="tx" placeholder="发一条友善的评论" rows="2" maxlength="200"></textarea>
    <button>发布</button>
  </div>
  <div class="wrapper">
    <span class="total">0/200字</span>
  </div>
  <div class="list">
    <div class="item" style="display: none;">
      <i class="avatar"></i>
      <div class="info">
        <p class="name">Big_Peng</p>
        <p class="text">大家都辛苦啦，感谢各位大大的努力，能圆满完成真是太好了[笑哭][支持]</p>
        <p class="time">2023-07-01 20:29:21</p>
      </div>
    </div>
  </div>
  <script>
    const textarea = document.querySelector('.wrapper textarea')
    const span = document.querySelector('.wrapper .total')
    const item = document.querySelector('.item')
    const text = document.querySelector('.text')
    const btn = document.querySelector('button')
    // 1.获得焦点
    textarea.addEventListener('focus',function(){
      span.style.opacity =  1
    })
    // 2.失去焦点
    textarea.addEventListener('blur',function(){
      span.style.opacity =  0
    })
    // 显示下方字数
    textarea.addEventListener('input',function(){
      const num = textarea.value.length
      span.innerText = `${num}/200字`
    })
    textarea.addEventListener('keyup',function(e){
      if(e.key === 'Enter') {
        if(textarea.value.trim() !== '') {
          item.style.display = 'block'
          text.innerHTML = textarea.value
        }
        textarea.value = ''
      }
    })
    btn.addEventListener('click',function(){
      if(textarea.value.trim() !== '') {
          item.style.display = 'block'
          text.innerHTML = textarea.value
        }
        textarea.value = ''
    })
  </script>
</body>
</html>