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NextJS inline CSS files
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| // Code "forked" from https://stackoverflow.com/a/66430461/4788966 | |
| import Document, { | |
| Main, | |
| NextScript, | |
| Head, | |
| Html | |
| } from 'next/document' | |
| import {readFileSync} from "fs" | |
| import {join} from "path" | |
| class InlineStylesHead extends Head { | |
| getCssLinks(files) { | |
| const { | |
| assetPrefix, | |
| devOnlyCacheBusterQueryString, | |
| dynamicImports, | |
| optimizeFonts, | |
| } = this.context | |
| const cssFiles = files.allFiles.filter((file) => file.endsWith('.css')) | |
| const sharedFiles = new Set(files.sharedFiles) | |
| // Unmanaged files are CSS files that will be handled directly by the | |
| // webpack runtime (`mini-css-extract-plugin`). | |
| let dynamicCssFiles = dedupe(dynamicImports.filter((file) => file.endsWith('.css'))) | |
| if (dynamicCssFiles.length) { | |
| const existing = new Set(cssFiles) | |
| dynamicCssFiles = dynamicCssFiles.filter((file) => !(existing.has(file) || sharedFiles.has(file))) | |
| cssFiles.push(...dynamicCssFiles) | |
| } | |
| let cssLinkElements = [] | |
| cssFiles.forEach((file) => { | |
| cssLinkElements.push( | |
| <style | |
| key={file} | |
| data-href={`${assetPrefix}/_next/${encodeURI(file)}${devOnlyCacheBusterQueryString}`} | |
| dangerouslySetInnerHTML={{ | |
| __html: readFileSync(join(process.cwd(), '.next', file), 'utf-8'), | |
| }} | |
| /> | |
| ) | |
| }) | |
| if (process.env.NODE_ENV !== 'development' && optimizeFonts) { | |
| cssLinkElements = this.makeStylesheetInert(cssLinkElements) | |
| } | |
| return cssLinkElements.length === 0 ? null : cssLinkElements | |
| } | |
| } | |
| function dedupe(bundles) { | |
| const files = new Set() | |
| const kept = [] | |
| for (const bundle of bundles) { | |
| if (files.has(bundle)) continue | |
| files.add(bundle) | |
| kept.push(bundle) | |
| } | |
| return kept | |
| } | |
| export default class MyDocument extends Document { | |
| render() { | |
| return ( | |
| <Html lang="ru" dir="ltr"> | |
| <InlineStylesHead/> | |
| <body> | |
| <Main /> | |
| <NextScript /> | |
| </body> | |
| </Html> | |
| ); | |
| } | |
| } |
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