53 lines
1.5 KiB
Markdown
53 lines
1.5 KiB
Markdown
---
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title: Bouncing loader
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tags: animation,intermediate
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firstSeen: 2018-03-04T06:24:22+02:00
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lastUpdated: 2020-12-30T15:37:37+02:00
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---
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Creates a bouncing loader animation.
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- Use `@keyframes` to define an animation with two states, where the element changes `opacity` and is translated up on the 2D plane using `transform: translate3d()`. Use a single axis translation on `transform: translate3d()` to achieve better animation performance.
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- Create a parent container, `.bouncing-loader`, for the bouncing circles and use `display: flex` and `justify-content: center` to position them in the center.
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- Give the three bouncing circle `<div>` elements a `width` and `height` of `16px` and use `border-radius: 50%` to make them circular.
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- Apply the `bouncing-loader` animation to each of the three bouncing circles, using a different `animation-delay` for each one and `animation-direction: alternate` to create the appropriate effect.
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```html
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<div class="bouncing-loader">
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<div></div>
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<div></div>
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<div></div>
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</div>
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```
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```css
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@keyframes bouncing-loader {
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to {
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opacity: 0.1;
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transform: translate3d(0, -16px, 0);
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}
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}
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.bouncing-loader {
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display: flex;
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justify-content: center;
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}
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.bouncing-loader > div {
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width: 16px;
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height: 16px;
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margin: 3rem 0.2rem;
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background: #8385aa;
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border-radius: 50%;
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animation: bouncing-loader 0.6s infinite alternate;
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}
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.bouncing-loader > div:nth-child(2) {
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animation-delay: 0.2s;
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}
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.bouncing-loader > div:nth-child(3) {
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animation-delay: 0.4s;
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}
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```
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