最近在看jquery东西，一时兴起纯手写了一份jquery版的轮博图，在此记录一下。。。
实现效果如下：
代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.content {
position: relative;
}
.carousel {
position: relative;
width: 800px;
height: 350px;
margin: 0 auto;
}
.carousel>div:first-child {
overflow: hidden;
width: 800px;
height: 350px;
}
.carousel img {
width: 800px;
height: 350px;
}
.item ul {
display: flex;
position: absolute;
left: 50%;
bottom: 0;
transform: translateX(-50%)
}
.item ul li {
list-style: none;
width: 50px;
height: 15px;
background: rgba(0, 0, 0, 0.3);
margin: 0 20px;
}
.active {
background: orangered !important;
}
.left,
.right {
position: absolute;
width: 30px;
height: 60px;
border: 1px solid #000;
font-weight: 900;
font-size: 22px;
line-height: 60px;
text-align: center;
}
.left {
left: -35px;
top: 50%;
transform: translateY(-50%);
}
.right {
right: -35px;
top: 50%;
transform: translateY(-50%);
}
</style>
</head>
<body>
<div class="content">
<div class="carousel">
<div>
<img src="https://aecpm.alicdn.com/simba/img/TB1XotJXQfb_uJkSnhJSuvdDVXa.jpg" alt="">
<img src="https://aecpm.alicdn.com/simba/img/TB183NQapLM8KJjSZFBSutJHVXa.jpg" alt="">
<img src="https://img.alicdn.com/tfs/TB16AtDhzMZ7e4jSZFOXXX7epXa-520-280.jpg_q90_.webp" alt="">
<img src="https://img.alicdn.com/tfs/TB1PQ00TUH1gK0jSZSyXXXtlpXa-520-280.png_q90_.webp" alt="">
</div>
<div class="left"><</div>
<div class="right">></div>
</div>
<div class="item">
<ul>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</div>
</div>
<script src="./jquery-1.12.4.js"></script>
<script>
let i = 0
function run() {
// 获取下标为 i 的图片，让下标为 i 的图片显示， 其他图片隐藏
$('.carousel img').eq(i).show().siblings().hide()
// 获取轮播图小标为 i 的小长方形按钮，给 i 下标的按钮添加类名active，删除其他元素的类名active
$('.item ul li').eq(i).addClass('active').siblings().removeClass('active')
}
function times() {// 每2s执行一次run函数
return setInterval(() => {
if (++i === 4) { i = 0 }
run()
}, 2000)
}
let timer = times() //调用
// 获取轮播图小按钮，绑定鼠标事件
$('.item ul li').mouseenter(function () {
clearInterval(timer) //清除计时器
i = $(this).index() // 获取当前鼠标所在的按钮下标
run()
})
// 获取轮播图小按钮，绑定鼠标离开事件，当鼠标离开后重新启动定时器
$('.item ul li').mouseleave(function () {
timer = times()
})
// 左边< , 点击后图片向左轮播
$('.left').click(function () {
clearInterval(timer)
if (--i < 0) {
i = 3
}
run()
timer = times()
})
// 右边> ,点击后图片向右边轮播
$('.right').click(function () {
clearInterval(timer)
if (++i === 4) {
i = 0
}
run()
timer = times()
})
</script>
</body>
</html>