使用HTML、CSS和JavaScript构建可触摸控制的视频滑块教程

<div class="slider-container">
  <div class="slide">
    <h2>Airpods</h2>
    <h4>$199</h4>
    <video width="320" height="240" controls>
      <source src="https://player.vimeo.com/external/367564948.sd.mp4?s=d969af3ae466e775628a8d281105fd03a8df12ae&profile_id=165&oauth2_token_id=57447761" type="video/mp4"/>
    </video>
    <a href="#" class="btn">Buy Now</a>
  </div>
  <div class="slide">
    <h2>iPhone 12</h2>
    <h4>$799</h4>
    <video width="320" height="240" controls>
      <source src="https://player.vimeo.com/external/334344435.sd.mp4?s=d367341a941ffa97781ade70e4f4a28f4a1a5fc8&profile_id=165&oauth2_token_id=57447761" type="video/mp4"/>
    </video>
    <a href="#" class="btn">Buy Now</a>
  </div>
  <div class="slide">
    <h2>iPad</h2>
    <h4>$599</h4>
    <video width="320" height="240" controls>
      <source src="https://player.vimeo.com/external/369639344.sd.mp4?s=b892fce959245aa4ae7ab08bc4b1af2766acdf4e&profile_id=165&oauth2_token_id=57447761" type="video/mp4"/>
    </video>
    <a href="#" class="btn">Buy Now</a>
  </div>
</div>

@import url('https://fonts.googleapis.com/css2?family=Open+Sans&display=swap');

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  font-family: 'Open Sans', sans-serif;
  height: 100%;
  width: 100%;
  overflow: hidden;
  background-color: #333;
  color: #fff;
  line-height: 1.7;
}

.slider-container {
  height: 100vh;
  display: inline-flex;
  overflow: hidden;
  transform: translateX(0);
  transition: transform 0.3s ease-out;
  cursor: grab;
}

.slide {
  max-height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  user-select: none;
}

/* 关键样式调整：确保视频元素能正确缩放 */
.slide video { /* 将原有的 .slide img 更改为 .slide video */
  max-width: 100%;
  max-height: 60%;
  transition: transform 0.3s ease-in-out;
}

.slide h2 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.slide h4 {
  font-size: 1.3rem;
}

.btn {
  background-color: #444;
  color: #fff;
  text-decoration: none;
  padding: 1rem 1.5rem;
}

.grabbing {
  cursor: grabbing;
}

.grabbing .slide video { /* 同样，确保拖拽时的缩放效果作用于视频 */
  transform: scale(0.9);
}

/*
  This JS code is from the following project:
  https://github.com/bushblade/Full-Screen-Touch-Slider
*/

const slider = document.querySelector('.slider-container'),
  slides = Array.from(document.querySelectorAll('.slide'))

let isDragging = false,
  startPos = 0,
  currentTranslate = 0,
  prevTranslate = 0,
  animationID = 0,
  currentIndex = 0

slides.forEach((slide, index) => {
  // 关键修正：确保查询的是 'video' 元素而不是 'img' 元素
  const slideVideo = slide.querySelector('video')
  // 阻止视频元素的默认拖拽行为，以免与滑块拖拽冲突
  if (slideVideo) { // 确保视频元素存在
    slideVideo.addEventListener('dragstart', (e) => e.preventDefault())
  }


  // 触摸事件监听
  slide.addEventListener('touchstart', touchStart(index))
  slide.addEventListener('touchend', touchEnd)
  slide.addEventListener('touchmove', touchMove)

  // 鼠标事件监听
  slide.addEventListener('mousedown', touchStart(index))
  slide.addEventListener('mouseup', touchEnd)
  slide.addEventListener('mouseleave', touchEnd)
  slide.addEventListener('mousemove', touchMove)
})

// 禁用右键菜单，避免干扰滑块操作
window.oncontextmenu = function (event) {
  event.preventDefault()
  event.stopPropagation()
  return false
}

// 触摸/鼠标按下事件处理函数
function touchStart(index) {
  return function (event) {
    currentIndex = index
    startPos = getPositionX(event) // 获取初始X坐标
    isDragging = true // 设置拖拽状态为true

    // 使用 requestAnimationFrame 优化动画性能
    animationID = requestAnimationFrame(animation)
    slider.classList.add('grabbing') // 添加抓取样式
  }
}

// 触摸/鼠标抬起事件处理函数
function touchEnd() {
  isDragging = false // 结束拖拽
  cancelAnimationFrame(animationID) // 取消动画帧

  const movedBy = currentTranslate - prevTranslate // 计算移动距离

  // 根据移动距离判断是否切换到上一个或下一个滑块
  if (movedBy < -100 && currentIndex < slides.length - 1) currentIndex += 1
  if (movedBy > 100 && currentIndex > 0) currentIndex -= 1

  setPositionByIndex() // 将滑块定位到当前索引位置

  slider.classList.remove('grabbing') // 移除抓取样式
}

// 触摸/鼠标移动事件处理函数
function touchMove(event) {
  if (isDragging) {
    const currentPosition = getPositionX(event) // 获取当前X坐标
    // 计算当前滑块的偏移量
    currentTranslate = prevTranslate + currentPosition - startPos
  }
}

// 获取事件的X坐标（兼容鼠标和触摸事件）
function getPositionX(event) {
  return event.type.includes('mouse') ? event.pageX : event.touches[0].clientX
}

// 动画函数，用于平滑移动滑块
function animation() {
  setSliderPosition() // 设置滑块位置
  if (isDragging) requestAnimationFrame(animation) // 如果仍在拖拽，继续请求下一帧
}

// 设置滑块的CSS transform属性
function setSliderPosition() {
  slider.style.transform = `translateX(${currentTranslate}px)`
}

// 根据当前索引设置滑块位置
function setPositionByIndex() {
  currentTranslate = currentIndex * -window.innerWidth // 计算目标偏移量
  prevTranslate = currentTranslate // 更新上一个偏移量
  setSliderPosition() // 应用新位置
}