如何使用纯CSS实现徘徊的果冻怪兽（附源码）

效果预览

源代码下载

https://github.com/comehope/front-end-daily-challenges

代码解读

定义 dom，容器中包含 2 个元素，分别代表怪兽的身体和眼睛：

<p class="monster">
 <span class="body"></span>
 <span class="eyes"></span>
</p>

设置背景色：

body {
 margin: 0;
 height: 100vh;
 background-color: black;
}

设置前景色：

.monster {
 width: 100vw;
 height: 50vh;
 background-color: lightcyan;
}

画出怪兽的身体：

.monster {
 position: relative;
}

.body {
 position: absolute;
 width: 32vmin;
 height: 32vmin;
 background-color: teal;
 border-radius: 43% 40% 43% 40%;
 bottom: calc(-1 * 32vmin / 2 - 4vmin);
}

定义怪兽眼睛所在的容器：

.eyes {
 width: 24vmin;
 height: 5vmin;
 position: absolute;
 bottom: 2vmin;
 left: calc(32vmin - 24vmin - 2vmin);
}

用伪元素画出怪兽的眼睛：

.eyes::before,
.eyes::after {
 content: '';
 position: absolute;
 width: 5vmin;
 height: 5vmin;
 border: 1.25vmin solid white;
 box-sizing: border-box;
 border-radius: 50%;
}

.eyes::before {
 left: 4vmin;
}

.eyes::after {
 right: 4vmin;
}

为怪兽定义轻轻跳起的动画，结合后面的动画效果，让它具有果冻的弹性：

.body {
 animation:
 bounce 1s infinite alternate;
}

@keyframes bounce {
 to {
 bottom: calc(-1 * 32vmin / 2 - 2vmin);
 }
}

让怪兽的身体转动起来：

@keyframes wave {
 to {
 transform: rotate(360deg);
 }
}

让怪兽徘徊行走：

.monster {
 overflow: hidden;
}

.body {
 left: -2vmin;
 animation:
 wander 5s linear infinite alternate,
 wave 3s linear infinite,
 bounce 1s infinite alternate;
}

.eyes {
 animation: wander 5s linear infinite alternate;
}

@keyframes wander {
 to {
 left: calc(100% - 32vmin + 2vmin);
 }
}

最后，让怪兽的眼睛眨一眨：

.eyes::before,
.eyes::after {
 animation: blink 3s infinite linear;
}

@keyframes blink {
 4%, 10%, 34%, 40% {
 transform: scaleY(1);
 }

 7%, 37% {
 transform: scaleY(0);
 }
}

大功告成！