A simple example of JavaScript implementing image carousel effect
This article mainly introduces JavaScript to implement a simple image carousel effect. Click the subscript to switch to the image. It has a certain reference value. Interested friends can refer to it.
The example of this article is Everyone shared the specific code to implement a simple image carousel in js, and finally achieved the rendering
##code block
The above is the entire content of this article. I hope it will be helpful to everyone's study. I also hope that everyone will support Script Home.<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style>
* {
margin: 0;
padding: 0
}
ul {
list-style: none
}
img {
vertical-align: top
}
.box {
width: 490px;
height: 170px;
margin: 100px auto;
padding: 5px;
border: 1px solid #ccc;
}
.inner {
width: 490px;
height: 170px;
background-color: pink;
overflow: hidden;
position: relative;
}
.inner ul {
width: 1000%;
position: absolute;
top: 0;
left: 0;
}
.inner li {
float: left;
}
.square {
position: absolute;
right: 10px;
bottom: 10px;
}
.square span {
display: inline-block;
width: 16px;
height: 16px;
background-color: #fff;
text-align: center;
line-height: 16px;
cursor: pointer;
}
.square span.current {
background-color: orangered;
color: #fff;
}
</style>
</head>
<body>
<p class="box" id="box">
<p class="inner">
<ul>
<li><a href="#"><img src="images/01.jpg" /></a></li>
<li><a href="#"><img src="images/02.jpg" /></a></li>
<li><a href="#"><img src="images/03.jpg" /></a></li>
<li><a href="#"><img src="images/04.jpg" /></a></li>
<li><a href="#"><img src="images/05.jpg" /></a></li>
</ul>
<p class="square">
<span class="current">1</span>
<span>2</span>
<span>3</span>
<span>4</span>
<span>5</span>
</p>
</p>
</p>
<script type="text/javascript">
//鼠标经过按钮 按钮排他
var box = document.getElementById("box");
var inner = box.children[0]; //获取box下的第一个元素，也就是inner
var ul = inner.children[0]; //获取inner下的ul
var squareList = inner.children[1]; //获取inner下的第二个元素
var squares = squareList.children; //获取所有的按钮
var imgWidth = inner.offsetWidth;
// alert(imgWidth);
//给每个按钮注册鼠标经过事件
for(var i=0; i<squares.length; i++){
squares[i].index = i; //把索引保存在自定义属性中
squares[i].onmouseover = function(){ //鼠标经过事件
//排他 干掉所有人
for(var j=0; j<squares.length; j++){
squares[j].className = "";
}
//留下我自己
this.className = "current";
//以动画的方式把ul移动到指定的位置
//目标 和当前按钮索引有关，和图片宽度有关 而且是负数
var target = -this.index * imgWidth; //获取到索引
animate(ul,target);
}
}
function animate(obj, target) {
clearInterval(obj.timer);
obj.timer = setInterval(function () {
var step = 20;
var step = obj.offsetLeft < target ? step : -step;
if (Math.abs(obj.offsetLeft - target) > Math.abs(step)) {
obj.style.left = obj.offsetLeft + step + "px";
} else {
obj.style.left = target + "px";
clearInterval(obj.timer);
}
}, 15)
}
</script>
</body>
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