前端 CSS : 5# 纯 CSS 实现24小时超市

介绍原文链接感謝 comehope 大佬的 [前端每日实战]效果预览github.io 浏览源代码地址https://github.com/shanyuhai1…代码解读1. html 结构命名规则使用了 BEM<figure class=“street”> <div class=“market”> </div></figure>常规样式初始化* { margin: 0; padding: 0; box-sizing: border-box;}body { height: 100vh; overflow: hidden;}2. 街道背景街道背景分为两部分深蓝色的天空.street { height: 100vh; position: relative; display: flex; justify-content: center; align-items: flex-end; background-color: #0b2e4e; overflow: hidden;}黑色的地面.street::before { content: “”; position: absolute; bottom: 0; left: 0; right: 0; width: 100%; height: 25vh; background-color: #000000;}3. 超市超市, 首先创建一个长方形代表超市.market { position: relative; display: flex; width: 520px; height: 270px; background-color: #fffecc; border: 4px solid #333333;}接着给超市增加 24 HOURS 的标识, 需要在 market 下增加一个 span 标签<div class=“market”> <span class=“market__name”>24 hours</span></div>生意好的超市必然亮堂堂.market { box-shadow: 0 22px 110px 12px #f5efa1;}增大超市(正方形的上 border ), 用于存放标识.market { border-top-width: 50px;}将标识定位到上 border, 并给其添加发光样式.market__name { position: absolute; top: -38px; left: 20px; font-family: sans-serif; font-size: 1.4em; letter-spacing: 0.4em; color: #bdf8ff; text-transform: uppercase; text-shadow: 0px 0px 9px #95cfef;}再给该标识添加闪烁动画.market__name { animation: signboardFlashes 5s infinite alternate linear;}/* keyframes /@keyframes signboardFlashes { 0% { opacity: 1; } 35% { opacity: 1; } 36% { opacity: 0; } 37% { opacity: 1; } 70% { opacity: 1; } 72% { opacity: 0; } 73% { opacity: 1; } 74% { opacity: 0; } 75% { opacity: 1; } 100% { opacity: 1; }}接着需要给超市增加 4 扇门, 并基于基础的样式<div class=“market”> <span class=“market__name”>24 hours</span> <span class=“market__fold”></span> <span class=“market__fold”></span> <span class=“market__fold”></span> <span class=“market__fold”></span></div>.market__fold { position: relative; width: 25%; border: 8px solid #000000;}/ 此处无法在 .market__fold 使用 inset 替代 /.market__fold::before { content: “”; position: absolute; top: 0; left: 0; bottom: 0; right: 0; width: 100%; height: 100%; box-shadow: 0 0 2px 1px #f3f1d5;}门是感应门, 当有生物靠近才会打开, 所以打开的动画等一下完成4. 月亮在 market 中添加 moon<div class=“market”> <span class=“moon”></span></div>通过绝对定位将其移动到超市的上方, 并添加动画效果.moon { position: absolute; top: -125px; left: -50px; width: 40px; height: 40px; background-color: #ffffc9; border-radius: 50%; box-shadow: 0 0 20px 1px #ffffc9; animation: moonMoves 360s infinite alternate linear;}@keyframes moonMoves { 0% { transform: translate(0, 0); } 50% { transform: translate(300px, -10px); } 100% { transform: translate(600px, 0); }}5. 原地踏步的猫在 market 添加 cat<div class=“market”> <section class=“cat”></section></div>首先给予一个轮廓方便观察.cat { –cat-color: red; position: absolute; left: -200px; bottom: -24px; width: 46px; height: 30px; margin: auto; color: var(–cat-color); background-color: var(–cat-color); border-radius: 30px;}修改猫的 DOM 结构, 添加头, 尾巴, 四肢<section class=“cat”> <div class=“cat__head”></div> <span class=“cat__tail”></span> <span class=“cat__leg”></span> <span class=“cat__leg”></span> <span class=“cat__leg”></span> <span class=“cat__leg”></span></section>然后依次给予其样式首先是头部, 头部使用伪元素形成耳朵, 并添加头部晃动效果.cat__head { position: absolute; right: -10px; top: -8px; width: 24px; height: 24px; background-color: inherit; border-radius: 50%; animation: catMovesHead 0.3s infinite linear;}.cat__head::before, .cat__head::after { content: “”; position: absolute; top: 0; width: 10px; height: 10px; background-color: inherit; border-radius: 2px;}.cat__head::before { left: 2px; transform: rotate(16deg);}.cat__head::after { right: 2px; transform: rotate(-16deg);}@keyframes catMovesHead { 0% { transform: translateY(0); } 50% { transform: translateY(2px); } 100% { transform: translateY(0); }}添加尾巴及动画效果(尾巴由椭圆形的一半构成).cat__tail { position: absolute; left: -18px; top: -22px; width: 30px; height: 42px; border-radius: 50%; border: 7px solid var(–cat-color); border-left-color: transparent; border-bottom-color: transparent; transform-origin: right; animation: catMovesTail 0.3s infinite linear;}@keyframes catMovesTail { 0% { transform: rotate(0); } 50% { transform: rotate(-3deg); } 100% { transform: rotate(0); }}猫咪的四肢.cat__leg { position: absolute; bottom: -12px; width: 6px; height: 20px; background-color: inherit; border-radius: 3px; transform-origin: top;}将四肢分开和添加动画<span class=“cat__leg cat__leg–1”></span><span class=“cat__leg cat__leg–2”></span><span class=“cat__leg cat__leg–3”></span><span class=“cat__leg cat__leg–4”></span>.cat__leg–1, .cat__leg–2 { left: 5px;}.cat__leg–3, .cat__leg–4 { right: 5px;}.cat__leg–1, .cat__leg–3 { transform: rotate(24deg); animation: catMovesLegs 0.6s infinite linear;}.cat__leg–2, .cat__leg–4 { transform: rotate(-24deg); animation: catMovesLegs 0.6s infinite -0.3s linear;}@keyframes catMovesLegs { 0% { transform: rotate(36deg); } 50% { transform: rotate(-36deg); } 100% { transform: rotate(36deg); }}6. 猫过门开给予猫一个整体的动画.cat { animation: catRuns 20s infinite linear;}@keyframes catRuns { 0% { transform: translateX(0) rotateY(0); } 70% { transform: translateX(800px) rotateY(0); } 71% { transform: translateX(1000px) rotateY(180deg); } 100% { transform: translateX(0) rotateY(180deg); }}修改超市门的 DOM 上的 class<span class=“market__fold”></span><span class=“market__fold market__fold–left”></span><span class=“market__fold market__fold–right”></span><span class=“market__fold”></span>再增加开关门的效果, 根据上方猫的花费时间进行计算, 取一样的时间更方便一些.market__fold–left { animation: doorMovesLeft 20s infinite linear;}.market__fold–right { animation: doorMovesRight 20s infinite linear;}@keyframes doorMovesLeft { 0% { transform: translateX(0); } 28% { transform: translateX(0); } 30% { transform: translateX(-90%); } 54% { transform: translateX(-90%); } 56% { transform: translateX(0); } 83% { transform: translateX(0); } 85% { transform: translateX(-90%); } 97% { transform: translateX(-90%); } 99% { transform: translateX(0); } 100% { transform: translateX(0); }}@keyframes doorMovesRight { 0% { transform: translateX(0); } 28% { transform: translateX(0); } 30% { transform: translateX(90%); } 54% { transform: translateX(90%); } 56% { transform: translateX(0); } 83% { transform: translateX(0); } 85% { transform: translateX(90%); } 97% { transform: translateX(90%); } 99% { transform: translateX(0); } 100% { transform: translateX(0); }}最后就这样大功告成了不过记得把猫的颜色改回来/ 猫 */.cat { –cat-color: #000000;}7. 补充最后切换为移动端时注意到超市会横向占满, 通过 padding 设置一个空隙即可.street { padding: 0 6vw 115px;}感想最近忙着学习 Koa, 结果 CSS 感觉忘得差不多了,唉