简易的轮播图

好的，以下是一个简易的轮播图的实现方式：

HTML：

<div class="slider">
  <img src="image1.jpg" alt="Image 1">
  <img src="image2.jpg" alt="Image 2">
  <img src="image3.jpg" alt="Image 3">
</div>

CSS：

.slider {
  position: relative;
  width: 100%;
  height: 300px;
  overflow: hidden;
}

.slider img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.slider img:first-child {
  opacity: 1;
}

.slider img.active {
  opacity: 1;
}

.slider .prev, .slider .next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background-color: rgba(0, 0, 0, 0.5);
  color: #fff;
  text-align: center;
  line-height: 50px;
  cursor: pointer;
}

.slider .prev {
  left: 0;
}

.slider .next {
  right: 0;
}

JS：

const slider = document.querySelector('.slider');
const slides = slider.querySelectorAll('img');
const prev = slider.querySelector('.prev');
const next = slider.querySelector('.next');
let activeSlide = 0;

function showSlide(n) {
  slides[activeSlide].classList.remove('active');
  slides[n].classList.add('active');
  activeSlide = n;
}

function prevSlide() {
  let n = activeSlide - 1;
  if (n < 0) {
    n = slides.length - 1;
  }
  showSlide(n);
}

function nextSlide() {
  let n = activeSlide + 1;
  if (n >= slides.length) {
    n = 0;
  }
  showSlide(n);
}

prev.addEventListener('click', prevSlide);
next.addEventListener('click', nextSlide);

setInterval(nextSlide, 5000);

以上代码实现了一个基本的轮播图，可以通过 CSS 自定义轮播图的样式，通过 JS 实现轮播图的切换。其中，通过 setInterval 方法可以定时切换轮播图。