css之雪碧图（精灵图）
听到雪碧图是不是跟我一样，啥？雪碧图？不知所以。
如果一张大图由许多小图构成，那么每张小图都需要进行网络请求，这样一来就会有很多请求，为了减少网络请求，雪碧图就出现了。
雪碧图（Sprite）是一种在Web开发中常用的图像合并技术，将多个小图标或图片合并成一张大图，然后通过CSS来显示其不同部分。这种技术可以减少HTTP请求数量，提高网页加载速度。
以下是本人自己写的例子，大图的图片是在百度找的https://img2.baidu.com/it/u=2480900908,627122939&fm=253&fmt=auto&app=138&f=JPEG?w=602&h=231
原图长这样
代码运行长这样：
代码如下：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><style>div{display: flex;}.icon1{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -5px 1px;/* border: 1px solid #000; */}.icon2{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -95px 1px;}.icon3{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -185px 1px;}.icon4{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -275px 1px;}.icon5{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -365px 1px;}.icon6{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -455px 1px;}.icon7{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -545px 1px;}.icon2-1{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -5px -90px;}.icon2-2{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -95px -90px;}.icon2-3{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -185px -90px;}.icon2-4{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -275px -90px;}.icon2-5{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -365px -90px;}.icon2-6{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -455px -90px;}.icon2-7{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -545px -90px;}.icon3-1{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -5px -179px;}.icon3-2{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -95px -179px;}.icon3-3{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -185px -179px;}.icon3-4{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -275px -179px;}.icon3-5{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -365px -179px;}.icon3-6{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -455px -179px;}.icon3-7{display: block;background-image: url("@/../xuebitu.jpg");width:50px;height:55px;background-position: -545px -179px;}</style>
</head>
<body> <div><span class="icon1"></span><span class="icon2"></span><span class="icon3"></span><span class="icon4"></span><span class="icon5"></span><span class="icon6"></span><span class="icon7"></span></div><div><span class="icon2-1"></span><span class="icon2-2"></span><span class="icon2-3"></span><span class="icon2-4"></span><span class="icon2-5"></span><span class="icon2-6"></span><span class="icon2-7"></span></div><div><span class="icon3-1"></span><span class="icon3-2"></span><span class="icon3-3"></span><span class="icon3-4"></span><span class="icon3-5"></span><span class="icon3-6"></span><span class="icon3-7"></span></div><!-- <span class="icon2"></span> -->
</body>
</html>