| 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 && !ctx.parsedRequestHeaders.isRSCRequest) { | |
| return ( | |
| <style | |
| key={index} | |
| nonce={ctx.nonce} | |
| // @ts-ignore | |
| precedence={precedence} | |
| href={fullHref} | |
| > | |
| {entryCssFile.content} | |
| </style> | |
| ) | |
| } | |
| 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} | |
| /> | |
| ) | |
| }) | |
| } | |