<head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
.box {
width: 800px;
margin: 100px auto;
overflow: hidden;
}
.tBox li {
display: flex;
}
.tBox img {
width: 800px;
}
.btn {
display: flex;
justify-content: space-between;
margin-top: 10px;
}
.btn img {
width: 120px;
flex-shrink: 0;
}
.active {
border: 5px solid green;
}
</style>
<div class="box">
<ul class="tBox">
<li>
<img src="./img/1.jpg" alt="">
<img src="./img/2.jpg" alt="">
<img src="./img/3.jpg" alt="">
<img src="./img/4.jpg" alt="">
<img src="./img/5.jpg" alt="">
<img src="./img/6.jpg" alt="">
</li>
</ul>
<div class="btn">
<img class="active" src="./img/1.jpg" alt="">
<img src="./img/2.jpg" alt="">
<img src="./img/3.jpg" alt="">
<img src="./img/4.jpg" alt="">
<img src="./img/5.jpg" alt="">
<img src="./img/6.jpg" alt="">
</div>
</div>
<script>
// 2.鼠标移入小图标，切换对应的大图标
// a 更改的是变量 参考三. 实现下面效果
// b 更改透明度 参考四. 实现下面效果
var tBox = document.getElementsByClassName('tBox');
var img1 = document.querySelectorAll('.btn img');
console.log(img1, tBox);
for (let i = 0; i < img1.length; i++) {
img1[i].onmouseover = function () {
for (var j = 0; j < img1.length; j++) {
img1[j].classList.remove('active');
}
img1[i].classList.add('active');
tBox[0].style.marginLeft = '-' + i * 800 + 'px';
}
}
</script>