如何用纯 CSS 创作一个均衡器 loader 动画

效果预览

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https://codepen.io/comehope/pen/oybWBy


可交互视频教程


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https://scrimba.com/p/pEgDAM/cG64puy


源代码下载


本地下载

每日前端实战系列的全部源代码请从 github 下载:


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


代码解读


定义 dom,容器中包含 5 个子元素:


<div class="equalizer">
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
</div>

居中显示:


body {
margin: 0;
height: 100vh;
display: flex;
align-items: center;
justify-content: center;
background-color: black;
}

定义均衡器的样式:


.equalizer {
width: 10em;
height: 10em;
display: flex;
justify-content: space-between;
}

.equalizer span {
width: 1.5em;
background: linear-gradient(0deg, green, yellow, red);
}


定义均衡器竖条的动画效果:


.equalizer span {
animation: up-and-down 2s linear infinite;
}

@keyframes up-and-down{
0%, 100% {
clip-path: inset(27% 0 0 0);
}

10% {
    clip-path: inset(17% 0 0 0);
}

20% {
    clip-path: inset(55% 0 0 0);
}

30% {
    clip-path: inset(30% 0 0 0);
}

40% {
    clip-path: inset(13% 0 0 0);
}

50% {
    clip-path: inset(38% 0 0 0);
}

60% {
    clip-path: inset(80% 0 0 0);
}

70% {
    clip-path: inset(21% 0 0 0);
}

80% {
    clip-path: inset(0% 0 0 0);
}

90% {
    clip-path: inset(36% 0 0 0);
}

}


最后,设置各竖条依次动画:


.equalizer span {
animation: up-and-down 2s linear infinite calc(-1 * 0.4s * (var(--n) - 1));
}

.equalizer span:nth-child(1) {
--n: 1;
}

.equalizer span:nth-child(2) {
--n: 2;
}

.equalizer span:nth-child(3) {
--n: 3;
}

.equalizer span:nth-child(4) {
--n: 4;
}

.equalizer span:nth-child(5) {
--n: 5;
}


大功告成!


原文地址:https://segmentfault.com/a/1190000015157160

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转载自www.cnblogs.com/lalalagq/p/10000331.html