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snippets/bouncing-loader.md

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+### Bouncing loader
+
+Creates a bouncing loader animation.
+
+#### HTML
+
+```html
+<div class="bouncing-loader">
+  <div></div>
+  <div></div>
+  <div></div>
+</div>
+```
+
+#### CSS
+
+```css
+@keyframes bouncing-loader {
+  from {
+    opacity: 1;
+    transform: translateY(0);
+  }
+  to {
+    opacity: 0.1;
+    transform: translateY(-1rem);
+  }
+}
+.bouncing-loader {
+  display: flex;
+  justify-content: center;
+}
+.bouncing-loader > div {
+  width: 1rem;
+  height: 1rem;
+  margin: 3rem 0.2rem;
+  background: #8385aa;
+  border-radius: 50%;
+  animation: bouncing-loader 0.6s infinite alternate;
+}
+.bouncing-loader > div:nth-of-type(2) {
+  animation-delay: 0.2s;
+}
+.bouncing-loader > div:nth-of-type(3) {
+  animation-delay: 0.4s;
+}
+```
+
+#### Demo
+
+<div class="snippet-demo">
+  <div class="snippet-demo__bouncing-loader">
+  	<div></div>
+    <div></div>
+    <div></div>
+  </div>
+</div>
+
+<style>
+@keyframes bouncing-loader {
+  from {
+    opacity: 1;
+    transform: translateY(0);
+  }
+  to {
+    opacity: 0.1;
+    transform: translateY(-1rem);
+  }
+}
+.snippet-demo__bouncing-loader {
+  display: flex;
+  justify-content: center;
+}
+.snippet-demo__bouncing-loader > div {
+  width: 1rem;
+  height: 1rem;
+  margin: 3rem 0.2rem;
+  background: #8385aa;
+  border-radius: 50%;
+  animation: bouncing-loader 0.6s infinite alternate;
+}
+.snippet-demo__bouncing-loader > div:nth-child(2) {
+  animation-delay: 0.2s;
+}
+.snippet-demo__bouncing-loader > div:nth-child(3) {
+  animation-delay: 0.4s;
+}
+</style>
+
+#### Explanation
+
+Note: `1rem` is usually `16px`.
+
+1. `@keyframes` defines an animation that has two states, where the element changes `opacity`, and is translated up on the 2D plane using `transform: translateY()`.
+
+2. `.bouncing-loader` is the parent container of the bouncing circles and uses `display: flex`
+   and `justify-content: center` to position them in the in the center.
+
+3. Using `.bouncing-loader > div`, we target the three child `div`s of the parent to be styled. The `div`s are given a width and height of `1rem`, using `border-radius: 50%` to turn them from squares to circles.
+
+4. `margin: 3rem 0.2rem` specifies that each circle has a top/bottom margin of `3rem` and left/right margin
+   of `0.2rem` so that they do not directly touch each other, giving them some breathing room.
+
+5. `animation` is a shorthand property for the various animation properties: `animation-name`, `animation-duration`, `animation-iteration-count`, `animation-direction` are used.
+
+6. `animation-delay` is used on the second and third `div` respectively, so that each element does not start the animation at the same time.
+
+#### Browser support
+
+<span class="snippet__support-note">✅ No caveats.</span>
+
+* https://caniuse.com/#feat=css-animation
+
+<!-- tags: animation -->