58 lines
1.4 KiB
Markdown
58 lines
1.4 KiB
Markdown
---
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title: Pulse loader
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type: snippet
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tags: [animation]
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cover: digital-nomad-8
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dateModified: 2021-10-13T19:29:39+02:00
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---
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Creates a pulse effect loader animation using the `animation-delay` property.
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- Use `@keyframes` to define an animation at two points in the cycle. At the start (`0%`), the two `<div>` elements have no `width` or `height` and are positioned at the center. At the end (`100%`), both `<div>` elements have increased `width` and `height`, but their `position` is reset to `0`.
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- Use `opacity` to transition from `1` to `0` when animating to give the `<div>` elements a disappearing effect as they expand.
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- Set a predefined `width` and `height` for the parent container, `.ripple-loader` and use `position: relative` to position its children.
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- Use `animation-delay` on the second `<div>` element, so that each element starts its animation at a different time.
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```html
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<div class="ripple-loader">
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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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.ripple-loader {
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position: relative;
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width: 64px;
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height: 64px;
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}
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.ripple-loader div {
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position: absolute;
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border: 4px solid #454ADE;
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border-radius: 50%;
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animation: ripple-loader 1s ease-out infinite;
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}
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.ripple-loader div:nth-child(2) {
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animation-delay: -0.5s;
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}
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@keyframes ripple-loader {
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0% {
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top: 32px;
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left: 32px;
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width: 0;
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height: 0;
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opacity: 1;
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}
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100% {
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top: 0;
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left: 0;
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width: 64px;
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height: 64px;
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opacity: 0;
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}
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}
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```
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