轮播图的制作

原创已于 2024-04-08 03:40:50 修改 · 231 阅读

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#css #css3 #javascript

于 2024-03-26 21:45:57 首次发布

轮播图的内容和功能

有左右有箭头

点击自动向各自的方向更换内容

此轮播图代码简单易懂好用

代码部分

<!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>轮播图点击切换</title>
  <style>
    * {
      box-sizing: border-box;
    }

    .slider {
      width: 560px;
      height: 400px;
      overflow: hidden;
      margin: 0 auto;
    }

    .slider-wrapper {
      width: 100%;
      height: 320px;
    }

    .slider-wrapper img {
      width: 100%;
      height: 100%;
      display: block;
    }

    .slider-footer {
      height: 80px;
      background-color: rgb(100, 67, 68);
      padding: 12px 12px 0 12px;
      position: relative;
    }

    .slider-footer .toggle {
      position: absolute;
      right: 0;
      top: 12px;
      display: flex;
    }

    .slider-footer .toggle button {
      margin-right: 12px;
      width: 28px;
      height: 28px;
      appearance: none;
      border: none;
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      border-radius: 4px;
      cursor: pointer;
    }

    .slider-footer .toggle button:hover {
      background: rgba(255, 255, 255, 0.2);
    }

    .slider-footer p {
      margin: 0;
      color: #fff;
      font-size: 18px;
      margin-bottom: 10px;
    }

    .slider-indicator {
      margin: 0;
      padding: 0;
      list-style: none;
      display: flex;
      align-items: center;
    }

    .slider-indicator li {
      width: 8px;
      height: 8px;
      margin: 4px;
      border-radius: 50%;
      background: #fff;
      opacity: 0.4;
      cursor: pointer;
    }

    .slider-indicator li.active {
      width: 12px;
      height: 12px;
      opacity: 1;
    }
  </style>
</head>

<body>
  <div class="slider">
    <div class="slider-wrapper">
      <img src="./images/slider01.jpg" alt="" />
    </div>
    <div class="slider-footer">
      <p>对人类来说会不会太超前了？</p>
      <ul class="slider-indicator">
        <li class="active"></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
      </ul>
      <div class="toggle">
        <button class="prev">&lt;</button>
        <button class="next">&gt;</button>
      </div>
    </div>
  </div>
  <script>
    // 1. 初始数据
    const data = [
      { url: './images/slider01.jpg', title: '对人类来说会不会太超前了？', color: 'rgb(100, 67, 68)' },
      { url: './images/slider02.jpg', title: '开启剑与雪的黑暗传说！', color: 'rgb(43, 35, 26)' },
      { url: './images/slider03.jpg', title: '真正的jo厨出现了！', color: 'rgb(36, 31, 33)' },
      { url: './images/slider04.jpg', title: '李玉刚：让世界通过B站看到东方大国文化', color: 'rgb(139, 98, 66)' },
      { url: './images/slider05.jpg', title: '快来分享你的寒假日常吧~', color: 'rgb(67, 90, 92)' },
      { url: './images/slider06.jpg', title: '哔哩哔哩小年YEAH', color: 'rgb(166, 131, 143)' },
      { url: './images/slider07.jpg', title: '一站式解决你的电脑配置问题！！！', color: 'rgb(53, 29, 25)' },
      { url: './images/slider08.jpg', title: '谁不想和小猫咪贴贴呢！', color: 'rgb(99, 72, 114)' },
    ]
    //获取元素
    const Img = document.querySelector('.slider-wrapper>img')
    const Title = document.querySelector('.slider-footer p')
    const Bac_color= document.querySelector('.slider-footer')
    const Prev = document.querySelector('.prev')
    const Next = document.querySelector('.next')
    //声明全局索引
    let i = 0

    //右箭头按钮功能
    Next.addEventListener('click',function(){
      i++
      //判断访问到最后一张图片从头开始访问
      i = i > data.length? 0 : i
     Toggle()
    })

    //左箭头按钮功能
    Prev.addEventListener('click',function(){
      i--
      //判断访问到第一张时再次点击直接跳转到最后一张
      i = i < 0? 7 : i
     Toggle()
    })

    //因为左箭头和右箭头渲染部分有相同的部分提取出来,声明一个函数复用
    function Toggle(){
      //给内容重新赋值
      Img.src = data[i].url
      Title.innerHTML = data[i].title
      console.log(Title);
      Bac_color.style.bacgroudColor = data[i].color
      //设置指导器随着内容的改变和改变
      document.querySelector('.slider-indicator .active').classList.remove('active')
      document.querySelector(`.slider-indicator li:nth-child(${i+1})`).classList.add('active')
    }
  
    //设置定时器 自动播放
    let timerId = 0
    timerId = setInterval(function(){
      Next.click()
    },1000)

    
    const bannerbox = document.querySelector('.slider')
    //触碰轮播器盒子暂停定时器
    bannerbox.addEventListener('mouseenter',function(){
      clearInterval(timerId)
    })
    //光标离开盒子恢复定时器
    bannerbox.addEventListener('mouseleave',function(){
      clearInterval(timerId)
      timerId = setInterval(function(){
        Next.click()
      },1000)
    })

  </script>
</body>

</html>