【每日一练】228—JS实现一款图片轮播幻灯片效果

每日一练11个月前发布 admin
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第228练最终效果如下:

【每日一练】228—JS实现一款图片轮播幻灯片效果

HTML:

<!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>第228练</title>
    <link
      rel=”stylesheet”
      href=”https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta2/css/all.min.css”
      integrity=”sha512-YWzhKL2whUzgiheMoBFwW8CKV4qpHQAEuvilg9FAn5VJUDwKZZxkJNuGM4XkWuk94WCrrwslk8yWNGmY1EduTA==”
      crossorigin=”anonymous”
      referrerpolicy=”no-referrer”
    />
    <link rel=”stylesheet” href=”index.css” />
  </head>
  <body>
    <div class=”slider-container”>
      <div class=”image-container”>
        <img src=”https://picsum.photos/id/237/500/300″ alt=”image” />
        <img src=”https://picsum.photos/id/1/500/300″ alt=”image” />
        <img src=”https://picsum.photos/id/10/500/300″ alt=”image” />
        <img src=”https://picsum.photos/id/20/500/300″ alt=”image” />
        <img src=”https://picsum.photos/id/200/500/300″ alt=”image” />
      </div>
      <i class=”fas fa-angle-double-left btn prev”></i>
      <i class=”fas fa-angle-double-right btn next”></i>
    </div>
    <script src=”index.js”></script>
  </body>
</html>

CSS:

body {
  margin: 0;
  display: flex;
  justify-content: center;
  height: 100vh;
  align-items: center;
  background-color: #fafafa;
}
.slider-container {
  position: relative;
  width: 500px;
  overflow: hidden;
  height: 300px;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}
.image-container {
  display: flex;
  transition: transform 0.4s ease-in-out;
}
.btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: white;
  font-size: 20px;
  opacity: 0.5;
  cursor: pointer;
}
.btn.prev {
  left: 10px;
}
.btn.next {
  right: 10px;
}
.btn:hover {
  opacity: 1;
}

JS:

const nextEl = document.querySelector(“.next”);
const prevEl = document.querySelector(“.prev”);
const imgsEl = document.querySelectorAll(“img”);
const imageContainerEl = document.querySelector(“.image-container”);
let currentImg = 1;
let timeout;
nextEl.addEventListener(“click”, () => {
  currentImg++;
  clearTimeout(timeout);
  updateImg();
});
prevEl.addEventListener(“click”, () => {
  currentImg–;
  clearTimeout(timeout);
  updateImg();
});
updateImg();
function updateImg() {
  if (currentImg > imgsEl.length) {
    currentImg = 1;
  } else if (currentImg < 1) {
    currentImg = imgsEl.length;
  }
  imageContainerEl.style.transform = `translateX(-${(currentImg – 1) * 500}px)`;
  timeout = setTimeout(() => {
    currentImg++;
    updateImg();
  }, 3000);
}
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