HTML+CSS+JS实现轮播图

news2024/9/21 12:36:52

效果：在这里插入图片描述
HTML:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./index.css">
</head>
<body>
    <div class="out-container">
        <div class="inner-container">
            <div class="item">1</div>
            <div class="item">2</div>
            <div class="item">3</div>
            <div class="item">4</div>
        </div>
        <div class="tools">
            <span class="active"></span>
            <span></span>
            <span></span>
            <span></span>
        </div>
    </div>
    <script src="./index.js"></script>
</body>
</html>

CSS:

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.out-container{
    width: 500px;
    height: 400px;
    margin: auto;
    overflow: hidden;
    position: relative;
}
.inner-container{
    width: 100%;
    height: 100%;
    display: flex;
    transition: all 0.5s;
}
.tools{
    position: absolute;
    left: 50%;
    bottom: 10px;
    transform: translateX(-50%);
    display: flex;
}
.tools>span{
    width: 20px;
    height: 20px;
    margin: 0 5px;
    border-radius: 20px;
    background: #ffffff;
    outline: #ffffff;
}
.tools>span.active{
    background: greenyellow;
}
.item{
    flex: 0 0 auto; /* 不改变宽度，保持内容宽度 */
    width: 500px;
    height: 400px;
}

.item:nth-child(1){
    background-color: rgb(192, 255, 207);
}
.item:nth-child(2){
    background-color: rgb(192, 224, 255);
}
.item:nth-child(3){
    background-color: rgb(255, 192, 236);
}
.item:nth-child(4){
    background-color: rgb(250, 255, 192);
}

JS:

const innerContainer = document.querySelector('.inner-container')
let itemCount = innerContainer.childElementCount
const toolItems = document.querySelectorAll('.tools span')
toolItems.forEach((item,index)=>{
    item.addEventListener('click',()=>{
        move(index)
    })
})
function move(index){
    toolItems.forEach(item=>item.classList.remove('active'))
    toolItems[index].classList.add('active')
    if(index == itemCount)index = 0
    innerContainer.style.transform = `translateX(${-100 * index}%)`
}