手写轮播图(支持h5手指滑动切换)，可无缝滚动

以下是一个简单的轮播图实现，支持H5中使用手指滑动切换图片，并且具有无缝滚动的效果。

HTML部分:

<div class="carousel">
  <div class="carousel-inner">
    <div class="carousel-item active"><img src="image1.jpg"></div>
    <div class="carousel-item"><img src="image2.jpg"></div>
    <div class="carousel-item"><img src="image3.jpg"></div>
    <!-- 更多轮播项 -->
  </div>
  <div class="carousel-controls">
    <button class="carousel-control-prev">Previous</button>
    <button class="carousel-control-next">Next</button>
  </div>
</div>

CSS部分:

.carousel {
  overflow: hidden;
  position: relative;
  width: 100%;
}
 
.carousel-inner {
  display: flex;
  width: 300%; /* 假设有三张图片，每张图片宽度100% */
  transition: transform 0.5s ease-in-out;
}
 
.carousel-item {
  flex: 1 0 auto;
  width: 100%;
}
 
.carousel-item img {
  width: 100%;
  height: auto;
}
 
.carousel-controls {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
}
 
.carousel-control-prev, .carousel-control-next {
  cursor: pointer;
}

JavaScript部分:

let carousel = document.querySelector('.carousel');
let inner = document.querySelector('.carousel-inner');
let items = document.querySelectorAll('.carousel-item');
let prevBtn = document.querySelector('.carousel-control-prev');
let nextBtn = document.querySelector('.carousel-control-next');
let currentIndex = 0;
 
function moveToSlide(direction) {
  let nextIndex = currentIndex + direction;
  if (nextIndex < 0) {
    nextIndex = items.length - 1;
  } else if (nextIndex >= items.length) {
    nextIndex = 0;
  }
  inner.style.transform = `translateX(${-nextIndex * 100}%)`;
  currentIndex = nextIndex;
}
 
prevBtn.addEventListener('click', function() {
  moveToSlide(-1);
});
 
nextBtn.addEventListener('click', function() {
  moveToSlide(1);
});
 
carousel.addEventListener('touchstart', function(e) {
  touchStartX = e.touches[0].clientX;
});
 
carousel.addEventListener('touchmove', function(e) {
  e.preventDefault(); // 防止页面滚动
  touchEndX = e.touches[0].clientX;
  if (touchEndX > touchStartX) {
    moveToSlide(-1); // 向左滑动
  } else {
    moveToSlide(1); // 向右滑动
  }
});
 
let touchStartX, touchEndX;

这段代