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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | 24x 4x 1x 1x 1x 1x 1x 1x 1x 4x 4x 2x 2x | import { isBlobUrl } from './isBlobUrl'
import { isDataUrl } from './isDataUrl'
import { isUrl } from './isUrl'
import { loadResource, LoadResourceUrlType } from './loadResource'
const cache: Record<string, HTMLStyleElement> = Object.create(null)
export interface LoadCssResult {
/**
* 样式元素。
*/
el: HTMLStyleElement
/**
* 销毁函数。
*/
destroy: () => void
}
/**
* 加载 CSS 样式，支持链接和内容。
*
* @param urlOrContent 链接或内容
* @example
* ```typescript
* loadCss('https://foo.bar/global.css')
* loadCss(`body { font-size: 20px; }`)
* ```
*/
export function loadCss(urlOrContent: string): Promise<LoadCssResult> {
return (urlOrContent in cache
? Promise.resolve(cache[urlOrContent])
: isUrl(urlOrContent) || isDataUrl(urlOrContent) || isBlobUrl(urlOrContent)
? loadResource({
type: LoadResourceUrlType.css,
path: urlOrContent,
}).then<HTMLStyleElement>(res => res[0] as any)
: new Promise<HTMLStyleElement>(resolve => {
const el = document.createElement('style')
el.setAttribute('type', 'text/css')
if ('textContent' in el) {
el.textContent = urlOrContent
} else E{
// @ts-ignore
el.styleSheet.cssText = urlOrContent
}
document.getElementsByTagName('head')[0].appendChild(el)
resolve(el)
})
).then<LoadCssResult>(el => {
cache[urlOrContent] = el
return {
el: el,
destroy: () => {
delete cache[urlOrContent]
el.parentNode!.removeChild(el)
},
}
})
}
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