js带左右箭头轮播代码

以下是一个使用 JavaScript 实现带左右箭头轮播的简单示例代码：

<!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>轮播示例</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    .carousel {
      width: 80%;
      margin: 0 auto;
      overflow: hidden;
      position: relative;
    }

    .carousel-inner {
      display: flex;
      transition: transform 0.5s ease-in-out;
    }

    .carousel-item {
      min-width: 100%;
      height: 300px;
      background-color: #f0f0f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
    }

    .arrow {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      cursor: pointer;
      font-size: 24px;
      color: #333;
    }

    .left-arrow {
      left: 10px;
    }

    .right-arrow {
      right: 10px;
    }
  </style>
</head>

<body>
  <div class="carousel" id="carousel">
    <div class="arrow left-arrow" onclick="prevSlide()">&#10094;</div>
    <div class="carousel-inner" id="carouselInner">
      <div class="carousel-item">1</div>
      <div class="carousel-item">2</div>
      <div class="carousel-item">3</div>
    </div>
    <div class="arrow right-arrow" onclick="nextSlide()">&#10095;</div>
  </div>

  <script>
    let currentIndex = 0;
    const items = document.querySelectorAll('.carousel-item');
    const totalItems = items.length;

    function showSlide(index) {
      const offset = -index * 100;
      document.getElementById('carouselInner').style.transform = `translateX(${offset}%)`;
    }

    function nextSlide() {
      currentIndex++;
      if (currentIndex >= totalItems) {
        currentIndex = 0;
      }
      showSlide(currentIndex);
    }

    function prevSlide() {
      currentIndex--;
      if (currentIndex < 0) {
        currentIndex = totalItems - 1;
      }
      showSlide(currentIndex);
    }
  </script>
</body>

</html>

基础概念：