loading.md

## Loading

`Loading` provides loading animation which can has custom size.

### Example

- The size of icon

Default is `24px` and can be configured by setting `size`.

```html
<cube-loading></cube-loading>
<cube-loading :size="28"></cube-loading>
<cube-loading :size="34"></cube-loading>
```

### Props configuration

| Attribute | Description | Type | Default |
| - | - | - | - |
| size | the size of loading icon, unit px | Number | 24 |