How to use pure CSS and JS to achieve image carousel effect-CSS Tutorial-php.cn

How to use pure CSS and JS to achieve image carousel effect

醉折花枝作酒筹

Release： 2021-04-23 09:06:54

forward

2625 people have browsed it

本篇文章给大家详细介绍一下使用纯CSS、JS实现图片轮播效果的方法。有一定的参考价值，有需要的朋友可以参考一下，希望对大家有所帮助。

How to use pure CSS and JS to achieve image carousel effect

<!DOCTYPE html><html>

	<head>
		<meta charset="UTF-8">
		<title></title>
		<!--轮播-->
		<style>
			.carousel {
				width: 648px;
				height: 400px;
				margin: 0 auto;
				text-align: center;
				position: absolute;
				left: 24%;
				/*border: 1px solid red;*/
			}
			
			.inner {
				/*border: 12px solid blue;*/
				width: 648px;
				height: 400px;
				position: absolute;
			}
			
			.inner-img {
				width: 200px;
				height: 500px;
				display: none;
				/*position: absolute;*/
				position: relative;
				/*top:0;*/
				/*left:0;*/
				/*z-index:1000;*/
			}
			
			.inner-img.active {
				display: block;
			}
			
			.leftBtn,
			.rightBtn {
				position: absolute;
				width: 40px;
				height: 60px;
				background: rgba(0, 0, 0, 0.3);
				/*近乎透明色*/
				font-size: 30px;
				color: #fff;
				text-align: center;
				line-height: 60px;
				cursor: pointer;
				display: none;
			}
			
			.leftBtn {
				left: 5px;
				top: 170px;
			}
			
			.rightBtn {
				/*right:5px;*/
				left: 603px;
				top: 170px;
			}
			
			.carousel ul {
				position: absolute;
				/*left:20px;*/
				padding-left: 228px;
				bottom: 10px;
				/*z-index: 999;*/
				list-style: none;
				width: 200px;
				height: 20px;
			}
			
			.carousel ul .page {
				float: left;
				width: 18px;
				height: 18px;
				line-height: 18px;
				border-radius: 18px;
				/*变成圆形*/
				background: black;
				margin-right: 6px;
				/*距离6个px单位*/
				color: #fff;
				font-size: 14px;
				/*text-align: center;*/
				cursor: pointer;
			}
			
			.carousel ul .page.active {
				background-color: red;
			}
			
			.carousel p {
				/*float: left;*/
				margin-top: -360px;
				margin-right: -600%;
				color: black;
				text-decoration: none;
				list-style: none;
			}
		</style>

	</head>

	<body>
		<!--轮播-->
		<p class="carousel">
			<p class="inner">
				<a href="#" class="inner-img active"><img src="https://s2.ax1x.com/2019/11/06/MCxe0O.jpg" alt="图片加载中" width="648" height="400"></a>
					<a href="#" class="inner-img"><img src="https://s2.ax1x.com/2019/11/06/MCxl9A.jpg" alt="图片加载中" width="648" height="400"></a>
					<a href="#" class="inner-img"><img src="https://s2.ax1x.com/2019/11/06/MCxJnf.jpg" alt="图片加载中" width="648" height="400"></a>
					<a href="#" class="inner-img"><img src="https://s2.ax1x.com/2019/11/06/MCxtHS.jpg" alt="图片加载中" width="648" height="400"></a>
					<a href="#" class="inner-img"><img src="https://s2.ax1x.com/2019/11/06/MCxaNQ.jpg" alt="图片加载中" width="648" height="400"></a>
					<a href="#" class="inner-img"><img src="https://s2.ax1x.com/2019/11/06/MCx6BT.jpg" alt="图片加载中" width="648" height="400"></a>
					<a href="#" class="inner-img"><img src="https://s2.ax1x.com/2019/11/06/MCxW4J.jpg" alt="图片加载中" width="648" height="400"></a>
					<a href="#" class="inner-img"><img src="https://s2.ax1x.com/2019/11/06/MCx43R.jpg" alt="图片加载中" width="648" height="400"></a>

					<p class="leftBtn">&lt;</p>
					<!--左按钮-->
					<p class="rightBtn">&gt;</p>
					<!--右按钮-->
			</p>
			<ul>
				<li class="page active">1</li>
				<li class="page">2</li>
				<li class="page">3</li>
				<li class="page">4</li>
				<li class="page">5</li>
				<li class="page">6</li>
				<li class="page">7</li>
				<li class="page">8</li>
			</ul>
		</p>

	</body>

	<script>
		var carousel = document.getElementsByClassName(&#39;carousel&#39;)[0], //获取carousel的class类
			// 获取所有包含图片的链接
			innerImg = document.getElementsByClassName(&#39;inner-img&#39;),
			// 获取左右按钮
			btnL = document.getElementsByClassName(&#39;leftBtn&#39;)[0],
			btnR = document.getElementsByClassName(&#39;rightBtn&#39;)[0],
			// 获取分页器
			page = document.getElementsByClassName(&#39;page&#39;),
			num = 0; // 声明变量 初始图片为第一张0
		// 声明时间控制函数
		var timer = setInterval(moveR, 2500); //调用moveR 时间间隔2.5s 
		// 图片向右轮播
		function moveR() {
			num++; // 变量每3000毫秒递增一次,图片向右轮播
			// 如果是最后一张图片的时候从0开始显示
			if(num == innerImg.length) {
				num = 0;
			}
			move();
		};
		// 图片向左轮播
		function moveL() {
			num--; // 每调用一次moveL(),变量递减一次
			// 如果是第一张图片，则从最后一张图片开始显示
			if(num == -1) {
				num = innerImg.length - 1;
			};
			move();
		}　　　　 // 图片切换
		　　		function move() {　　　　 // 把所有的innerImg隐藏和page背景全部变成黑色
			for(var i = 0; i < innerImg.length; i++) {
				innerImg[i].style.display = &#39;none&#39;;
				page[i].style.background = &#39;black&#39;;
			}
			// 把当前num下标的innerImg显示和page背景变成red
			innerImg[num].style.display = &#39;block&#39;;
			page[num].style.background = &#39;red&#39;;　　		}

		// 分页器鼠标滑过时图片切换
		for(var i = 0; i < page.length; i++) {
			// 用来保存下标，page[i].index == 0 / 1 / 2 / 3 /4...
			page[i].index = i;
			// console.log(page[i].index);
			// 因为已经保存好的下边，这里的page[i], page[0], page[1], page[2], page[3]
			page[i].onmouseover = function() {
				for(var j = 0; j < page.length; j++) {
					page[j].style.background = &#39;black&#39;;
					innerImg[j].style.display = &#39;none&#39;;
				}
				this.style.background = &#39;red&#39;;　　　　　　　 // console.log(this.index);可以查看是多少
				innerImg[this.index].style.display = &#39;block&#39;;
				num = this.index;
			}
		}
		btnL.onclick = function() {
			moveL();
		}
		btnR.onclick = function() {
			moveR();
		}

		// 鼠标划上carousel时让左右按钮显示 并清除时间函数 
		carousel.onmouseover = function() {
			// 清除时间函数
			clearInterval(timer); //暂停 图片不继续循环
			btnR.style.display = &#39;block&#39;;
			btnL.style.display = &#39;block&#39;;
		}

		// 鼠标离开carousel时让左右按钮隐藏
		carousel.onmouseout = function() {
			// 开启时间函数
			timer = setInterval(moveR, 2500);
			btnR.style.display = &#39;none&#39;;
			btnL.style.display = &#39;none&#39;;
		}
	</script></html>

Copy after login

推荐学习：css视频教程

The above is the detailed content of How to use pure CSS and JS to achieve image carousel effect. For more information, please follow other related articles on the PHP Chinese website!