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74 changes: 74 additions & 0 deletions
74
packages/next/src/server/app-render/render-css-resource.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| import type { CssResource } from '../../build/webpack/plugins/flight-manifest-plugin' | ||
| import { encodeURIPath } from '../../shared/lib/encode-uri-path' | ||
| import type { AppRenderContext } from './app-render' | ||
| import { getAssetQueryString } from './get-asset-query-string' | ||
| import type { PreloadCallbacks } from './types' | ||
|
|
||
| /** | ||
| * Abstracts the rendering of CSS files based on whether they are inlined or not. | ||
| * For inlined CSS, renders a <style> tag with the CSS content directly embedded. | ||
| * For external CSS files, renders a <link> tag pointing to the CSS file. | ||
| */ | ||
| export function renderCssResource( | ||
| entryCssFiles: CssResource[], | ||
| ctx: AppRenderContext, | ||
| preloadCallbacks?: PreloadCallbacks | ||
| ) { | ||
| return entryCssFiles.map((entryCssFile, index) => { | ||
| // `Precedence` is an opt-in signal for React to handle resource | ||
| // loading and deduplication, etc. It's also used as the key to sort | ||
| // resources so they will be injected in the correct order. | ||
| // During HMR, it's critical to use different `precedence` values | ||
| // for different stylesheets, so their order will be kept. | ||
| // https://github.com/facebook/react/pull/25060 | ||
| const precedence = | ||
| process.env.NODE_ENV === 'development' | ||
| ? 'next_' + entryCssFile.path | ||
| : 'next' | ||
|
|
||
| // In dev, Safari and Firefox will cache the resource during HMR: | ||
| // - https://github.com/vercel/next.js/issues/5860 | ||
| // - https://bugs.webkit.org/show_bug.cgi?id=187726 | ||
| // Because of this, we add a `?v=` query to bypass the cache during | ||
| // development. We need to also make sure that the number is always | ||
| // increasing. | ||
| const fullHref = `${ctx.assetPrefix}/_next/${encodeURIPath( | ||
| entryCssFile.path | ||
| )}${getAssetQueryString(ctx, true)}` | ||
|
|
||
| if (entryCssFile.inlined) { | ||
| return ( | ||
| <style | ||
| key={index} | ||
| dangerouslySetInnerHTML={{ | ||
| __html: entryCssFile.content, | ||
| }} | ||
| nonce={ctx.nonce} | ||
| // @ts-ignore | ||
| precedence={precedence} | ||
| href={fullHref} | ||
| /> | ||
| ) | ||
| } | ||
|
|
||
| preloadCallbacks?.push(() => { | ||
| ctx.componentMod.preloadStyle( | ||
| fullHref, | ||
| ctx.renderOpts.crossOrigin, | ||
| ctx.nonce | ||
| ) | ||
| }) | ||
|
|
||
| return ( | ||
| <link | ||
| key={index} | ||
| rel="stylesheet" | ||
| href={fullHref} | ||
| // @ts-ignore | ||
| precedence={precedence} | ||
| crossOrigin={ctx.renderOpts.crossOrigin} | ||
| nonce={ctx.nonce} | ||
| /> | ||
| ) | ||
| }) | ||
| } |
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