主要用到知识点：
•css3 3d转换 •原生js鼠标拖动事件
•display:grid 布局
实现的功能
•3d魔方 可点击，可拖动
•直接看效果
html：
<div class="container">
<div class="box defaul">
<div class="pic"><img src="./img/cat.jpg" alt=""></div>
<div class="pic"><img src="./img/dog.jpg" alt=""></div>
<div class="pic"><img src="./img/elephant.jpg" alt=""></div>
<div class="pic"><img src="./img/lion.jpg" alt=""></div>
<div class="pic"><img src="./img/rabbit.jpg" alt=""></div>
<div class="pic"><img src="./img/monkey.jpg" alt=""></div>
</div>
</div>
<h1>点击下面的图片按钮切换</h1>
<div class="btn">
<input type="image" class="1" src="./img/cat.jpg">
<input type="image" class="2" src="./img/dog.jpg">
<input type="image" class="3" src="./img/elephant.jpg">
<input type="image" class="4" src="./img/lion.jpg">
<input type="image" class="5" src="./img/rabbit.jpg">
<input type="image" class="6" src="./img/monkey.jpg">
</div>css：
* {
margin: 0;
padding: 0;
}
html,
body {
width: 100%;
height: 100%;
background: #66677c;
text-align: center;
}
.container {
width: 300px;
height: 300px;
margin: 50px auto 150px;
perspective: 1200px;
}
.container .box {
width: 300px;
height: 300px;
position: relative;
transform-style: preserve-3d;
transition: transform 0.5s;
}
.container .box .pic {
position: absolute;
left: 0;
top: 0;
width: 300px;
height: 300px;
box-shadow: 0px 0px 5px #fff;
}
.container .box .pic img {
width: 100%;
height: 100%;
cursor: pointer;
}
.container .box .pic:nth-child(1) {
transform: translateZ(150px);
}
.container .box .pic:nth-child(2) {
transform: rotateY(-180deg) translateZ(150px);
}
.container .box .pic:nth-child(3) {
transform: rotateY(90deg) translateZ(150px);
}
.container .box .pic:nth-child(4) {
transform: rotateY(-90deg) translateZ(150px);
