Function selectFirst

selectFirst(selectors, styleSheet): CSSRule | undefined
Selects the first style rule in the stylesheet whose cssText begins with any of the specified selectors.
Parameters
- selectors: string
  The starting text of the style rules to return
- styleSheet: CSSStyleSheet
  The CSSStyleSheet containing the rules to select
Returns CSSRule | undefined
The selected style rule
Example
```
import { selectFirst } from 'deleight/css';
const cssStyleSheet = await loadStyle('component1.css');
const firstSpanRule = selectFirst('span', cssStyleSheet)
```
- Defined in css/css.ts:145