javascript实现点击图片切换功能
本文实例为大家分享了javascript实现点击图片切换的具体代码，供大家参考，具体内容如下
实现效果：图片点击切换
代码：
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="../reset.css">
<style>
.img-list{
width: 480px;
height: 850px;
margin: 0 auto;
/* 为a提供参照 */
position:relative;
}
img{
width: 480px;
height: 850px;
object-fit: cover;
}
.img-list li{
/* 开启绝对定位使之可以设置 z-index */
position: absolute;
}
.img-list li:nth-child(3){
z-index: 1;
}
.pointer{
/* 开启绝对定位放在上面 */
position: absolute;
z-index: 999;
bottom: 40px;
margin-left: 140px;
}
.pointer a{
/* display: block; */
/* 横向排列 */
float: left;
width: 20px;
height: 20px;
background-color: salmon;
margin-left: 20px;
border-radius: 50%;
background-color: rgba(0, 0, 0, 0.3);
/*默认情况下background-color的颜色是会延伸到边框下面的，如果我们不想要延申，需要设置 */
background-clip: content-box;
border:2px solid transparent;
}
.pointer a.active,
.pointer a:hover
{
background-color: #fff;
border:3px solid rgba(0, 0, 0, 0.3);
}
</style>
<script>
window.onload =function(){
var imgArray = ["./img/1.jpg","./img/2.jpg","./img/3.jpg","./img/4.png","./img/5.jpg"];
var allA = document.getElementsByTagName("a");
var img = document.getElementsByTagName("img")[0];
for(var i =0 ;i<allA.length;i++){
allA[i].num = i;
allA[i].onclick=function(){
// 使用this.name,！！不能使用allA[i].name,因为i此时已经等于5了。
var index = this.num;
img.src=imgArray[index];
for(var j =0 ;j<allA.length;j++){
allA[j].className="";
}
this.className = "active";
}
}
}
</script>
</head>
<body>
<ul class="img-list">
<li><img src="./img/1.jpg" alt=""></li>
<!-- <li><a href="javascript:;"><img src="./img/2.jpg" alt=""></a></li>
<li><a href="javascript:;"><img src="./img/3.jpg" alt=""></a></li>
<li><a href="javascript:;"><img src="./img/4.png" alt=""></a></li>
<li><a href="javascript:;"><img src="./img/5.jpg" alt=""></a></li> -->
<div class="pointer">
<a href="javascript:;" class="active"></a>
<a href="javascript:;"></a>
<a href="javascript:;"></a>
<a href="javascript:;"></a>
<a href="javascript:;"></a>
</div>
</ul>
</body>
</html>
