仿苹果鼠标滚轮控制文字渐入淡出效果

news2024/7/4 5:14:51

废话不多说，上代码，纯js+css3

<!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>Document</title>
</head>


<body>

  <div id="iphone">

    <div id="ui">
      <ul>
        <li>
          哔哩哔哩 (゜-゜)つロ 干杯~-bilibili
        </li>
        <li>
          哔哩哔哩 (゜-゜)つロ 干杯~-bilibili
        </li>
        <li>
          哔哩哔哩 (゜-゜)つロ 干杯~-bilibili
        </li>
        <li>
          哔哩哔哩 (゜-゜)つロ 干杯~-bilibili
        </li>
        <li>
          哔哩哔哩 (゜-゜)つロ 干杯~-bilibili
        </li>
        <li>
          哔哩哔哩 (゜-゜)つロ 干杯~-bilibili
        </li>
        <li>
          哔哩哔哩 (゜-゜)つロ 干杯~-bilibili
        </li>
      </ul>
    </div>
  </div>
  <style>
    :root {
      --device-width: 770px;
      --device-height: 300vh;
      --ui-width: 640px;
      font-size: 15px;
    }

    #iphone {
      height: 800vh
    }

    #ui {
      position: sticky;
      top: 30%;
      left: 50%;
    }


    #ui ul li {
      display: block;
      width: var(--ui-width);
      height: 30px;
      margin: 10px auto;
      padding-bottom: 10px;
      border-bottom: 1px solid #222;
      transform: ranslateY(calc(-60px * (1 - var(--progress))));
      opacity: var(--progress);
    }
  </style>

  <script>
    const rows = document.querySelectorAll('#ui ul li')
    const html = document.documentElement

    document.addEventListener('scroll', (e) => {
      let scrolled = html.scrollTop / (html.scrollHeight - html.clientHeight)

      let total = 1 / rows.length

      for (let [index, row] of rows.entries()) {
        let start = total * index
        let end = total * (index + 1)

        let progress = (scrolled - start) / (end - start)
        if (progress >= 1) progress = 1
        if (progress <= 0) progress = 0

        row.style.setProperty('--progress', progress)
      }
    })
  </script>
</body>

</html>