| /** | |
| * For server-side CSS imports, we need to ignore the actual module content but | |
| * still trigger the hot-reloading diff mechanism. So here we put the content | |
| * inside a comment. | |
| */ | |
| import crypto from 'crypto' | |
| import type webpack from 'webpack' | |
| type NextServerCSSLoaderOptions = { | |
| cssModules: boolean | |
| } | |
| const NextServerCSSLoader: webpack.LoaderDefinitionFunction<NextServerCSSLoaderOptions> = | |
| function (content) { | |
| this.cacheable && this.cacheable() | |
| const options = this.getOptions() | |
| let isCSSModule = options.cssModules | |
| // Only add the checksum during development. | |
| if (process.env.NODE_ENV !== 'production') { | |
| // This check is only for backwards compatibility. | |
| // TODO: Remove this in the next major version (next 14) | |
| if (isCSSModule === undefined) { | |
| this.emitWarning( | |
| new Error( | |
| "No 'cssModules' option was found for the next-flight-css-loader plugin." | |
| ) | |
| ) | |
| isCSSModule = | |
| this.resourcePath.match(/\.module\.(css|sass|scss)$/) !== null | |
| } | |
| const checksum = crypto | |
| .createHash('sha1') | |
| .update(typeof content === 'string' ? Buffer.from(content) : content) | |
| .digest() | |
| .toString('hex') | |
| .substring(0, 12) | |
| if (isCSSModule) { | |
| return `\ | |
| ${content} | |
| module.exports.__checksum = ${JSON.stringify(checksum)} | |
| ` | |
| } | |
| // Server CSS imports are always available for HMR, so we attach | |
| // `module.hot.accept()` to the generated module. | |
| const hmrCode = 'if (module.hot) { module.hot.accept() }' | |
| return `\ | |
| export default ${JSON.stringify(checksum)} | |
| ${hmrCode} | |
| ` | |
| } | |
| return content | |
| } | |
| export default NextServerCSSLoader | |