### Donut spinner

Creates a donut spinner that can be used to indicate the loading of content.

#### HTML

```html
<div class="donut"></div>
```

#### CSS

```css
@keyframes donut-spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
.donut {
  display: inline-block;
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-left-color: #7983ff;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  animation: donut-spin 1.2s linear infinite;
}
```

#### Demo

#### Explanation

Use a semi-transparent `border` for the whole element, except one side that will
serve as the loading indicator for the donut. Use `animation` to rotate the element.

#### Browser support

<span class="snippet__support-note">⚠️ Requires prefixes for full support.</span>

- https://caniuse.com/#feat=css-animation
- https://caniuse.com/#feat=transforms2d

<!-- tags: animation -->