编程语言   发布时间:2022-06-26  发布网站:大佬教程  code.js-code.com
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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>Document</title>
    <script>
      document.documentElement.style.fontSize = document.documentElement.clientWidth / 37.5 + 'px'
    </script>
    <style>
      body {
        margin: 0;
        font-size: 5rem;
      }
      html,
      body,
      #app {
        height: 100%;
      }
      .slider-container {
        position: relative;
        height: 100%;
        width: 100%;
        overflow: hidden;
      }
      .scroll-wrapper {
        height: 100%;
        width: 400%;
        display: flex;
        position: absolute;
      }
      .slider-item {
        height: 100%;
        width: 25%;
      }
      .inner {
        height: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
      }
      .slider-item:nth-child(1) {
        background: cornflowerblue;
      }
      .slider-item:nth-child(2) {
        background: chocolate;
      }
      .slider-item:nth-child(3) {
        background: antiquewhite;
      }
      .slider-item:nth-child(4) {
        background: chartreuse;
      }
    </style>
  </head>
  <body>
    <div id="app">
      <div class="slider-container">
        <div class="scroll-wrapper">
          <div class="slider-item">
            <div class="inner">PAGE-1</div>
          </div>
          <div class="slider-item">
            <div class="inner">PAGE-2</div>
          </div>
          <div class="slider-item">
            <div class="inner">PAGE-3</div>
          </div>
          <div class="slider-item">
            <div class="inner">PAGE-4</div>
          </div>
        </div>
      </div>
    </div>
  </body>
  <script>
    let sliderContainer = document.querySelector('.slider-container'),
      scrollWrapper = document.querySelector('.scroll-wrapper'),
      oldSliderItems = sliderContainer.querySelectorAll('.slider-item'),
      innerWidth = document.documentElement.clientWidth

    let startX = 0,
      moveX = 0,
      distance = 0,
      pageIndex = 0,
      isMove = false

    const init = () => {
      bindEvent()
    }
    function bindEvent() {
      scrollWrapper.addEventListener('touchstart', handleTouchStart)
      scrollWrapper.addEventListener('touchmove', handleTouchMove)
      scrollWrapper.addEventListener('touchend', handleTouchEnd)
    }
    function handleTouchStart(e) {
      startX = e.touches[0].clientX
    }
    function handleTouchMove(e) {
      moveX = e.touches[0].clientX
      if ((moveX < startX && pageIndex === oldSliderItems.length - 1) || (moveX > startX && pageIndex === 0)) {
        return
      }
      distance = moveX - startX
      setTranslateX(-innerWidth * pageIndex + distance)
      isMove = true
    }
    function handleTouchEnd(e) {
      if (isMove) {
        if (Math.abs(distance) >= innerWidth / 3) {
          if (distance > 0) {
            pageIndex--
          }
          if (distance < 0) {
            pageIndex++
          }
        }
        setTranslateX(-innerWidth * pageIndex)
      }
      // 还原状态
      startX = 0
      distance = 0
      isMove = false
    }
    function setTranslateX(tranX) {
      scrollWrapper.style.transition = 'all .1s'
      scrollWrapper.style.transform = `translateX(${tranX}px)`
    }
    init()
  </script>
</html>

 

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