page loading demo: https://baohaoyu.github.io/react-loading/index.html
| name | type | explain |
|---|---|---|
| open | bool | Show or hide |
| dotSize | number | dot size fo loading |
| opacity | bool | The background is transparent or opaque |
| fullWindow | bool | Full browser window |
| dotColor | string | dot color |
| backgroundColor | string | loading background color |