Then I'm logging the URL string, fetching such file, and redering its contents on the page:
Open the reproduction project.
You will see the content of the CSS Module on the page. CSS Class Names will be hashed, e.g.:
$ vite build --debug
vite:config bundled config file loaded in 244.44ms +0ms
vite:config using resolved config: {
vite:config build: {
vite:config target: [ 'es2020', 'edge88', 'firefox78', 'chrome87', 'safari14' ],
vite:config cssTarget: [ 'es2020', 'edge88', 'firefox78', 'chrome87', 'safari14' ],
vite:config outDir: 'dist',
vite:config assetsDir: 'assets',
vite:config assetsInlineLimit: 4096,
vite:config cssCodeSplit: true,
vite:config sourcemap: true,
vite:config rollupOptions: {},
vite:config minify: false,
vite:config terserOptions: {},
vite:config write: true,
vite:config emptyOutDir: null,
vite:config copyPublicDir: true,
vite:config manifest: true,
vite:config lib: false,
vite:config ssr: false,
vite:config ssrManifest: false,
vite:config ssrEmitAssets: false,
vite:config reportCompressedSize: true,
vite:config chunkSizeWarningLimit: 500,
vite:config watch: null,
vite:config cssMinify: false,
vite:config commonjsOptions: { include: [Array], extensions: [Array] },
vite:config dynamicImportVarsOptions: { warnOnError: true, exclude: [Array] },
vite:config modulePreload: { polyfill: true }
vite:config },
vite:config optimizeDeps: {
vite:config disabled: 'build',
vite:config force: undefined,
vite:config esbuildOptions: { preserveSymlinks: false }
vite:config },
vite:config configFile: '/home/projects/vitejs-vite-pj3wxw/vite.config.ts',
vite:config configFileDependencies: [ '/home/projects/vitejs-vite-pj3wxw/vite.config.ts' ],
vite:config inlineConfig: {
vite:config root: undefined,
vite:config base: undefined,
vite:config mode: undefined,
vite:config configFile: undefined,
vite:config logLevel: undefined,
vite:config clearScreen: undefined,
vite:config optimizeDeps: { force: undefined },
vite:config build: {}
vite:config },
vite:config root: '/home/projects/vitejs-vite-pj3wxw',
vite:config base: '/',
vite:config rawBase: '/',
vite:config resolve: {
vite:config mainFields: [ 'module', 'jsnext:main', 'jsnext' ],
vite:config browserField: true,
vite:config conditions: [],
vite:config extensions: [
vite:config '.mjs', '.js',
vite:config '.mts', '.ts',
vite:config '.jsx', '.tsx',
vite:config '.json'
vite:config ],
vite:config dedupe: [],
vite:config preserveSymlinks: false,
vite:config alias: [ [Object], [Object] ]
vite:config },
vite:config publicDir: '/home/projects/vitejs-vite-pj3wxw/public',
vite:config cacheDir: '/home/projects/vitejs-vite-pj3wxw/node_modules/.vite',
vite:config command: 'build',
vite:config mode: 'production',
vite:config ssr: {
vite:config format: 'esm',
vite:config target: 'node',
vite:config optimizeDeps: { disabled: true, esbuildOptions: [Object] }
vite:config },
vite:config isWorker: false,
vite:config mainConfig: null,
vite:config isProduction: true,
vite:config plugins: [
vite:config 'vite:build-metadata',
vite:config 'vite:watch-package-data',
vite:config 'vite:pre-alias',
vite:config 'alias',
vite:config 'vite:modulepreload-polyfill',
vite:config 'vite:resolve',
vite:config 'vite:html-inline-proxy',
vite:config 'vite:css',
vite:config 'vite:esbuild',
vite:config 'vite:json',
vite:config 'vite:wasm-helper',
vite:config 'vite:worker',
vite:config 'vite:asset',
vite:config 'vite:wasm-fallback',
vite:config 'vite:define',
vite:config 'vite:css-post',
vite:config 'vite:build-html',
vite:config 'vite:worker-import-meta-url',
vite:config 'vite:asset-import-meta-url',
vite:config 'vite:force-systemjs-wrap-complete',
vite:config 'commonjs',
vite:config 'vite:data-uri',
vite:config 'vite:dynamic-import-vars',
vite:config 'vite:import-glob',
vite:config 'vite:build-import-analysis',
vite:config 'vite:esbuild-transpile',
vite:config 'vite:manifest',
vite:config 'vite:reporter',
vite:config 'vite:load-fallback'
vite:config ],
vite:config esbuild: { jsxDev: false },
vite:config server: {
vite:config preTransformRequests: true,
vite:config sourcemapIgnoreList: [Function: isInNodeModules],
vite:config middlewareMode: false,
vite:config fs: { strict: true, allow: [Array], deny: [Array] }
vite:config },
vite:config preview: {
vite:config port: undefined,
vite:config strictPort: undefined,
vite:config host: undefined,
vite:config https: undefined,
vite:config open: undefined,
vite:config proxy: undefined,
vite:config cors: undefined,
vite:config headers: undefined
vite:config },
vite:config envDir: '/home/projects/vitejs-vite-pj3wxw',
vite:config env: { BASE_URL: '/', MODE: 'production', DEV: false, PROD: true },
vite:config assetsInclude: [Function: assetsInclude],
vite:config logger: {
vite:config hasWarned: false,
vite:config info: [Function: info],
vite:config warn: [Function: warn],
vite:config warnOnce: [Function: warnOnce],
vite:config error: [Function: error],
vite:config clearScreen: [Function: clearScreen],
vite:config hasErrorLogged: [Function: hasErrorLogged]
vite:config },
vite:config packageCache: Map(1) {
vite:config 'fnpd_/home/projects/vitejs-vite-pj3wxw' => {
vite:config dir: '/home/projects/vitejs-vite-pj3wxw',
vite:config data: [Object],
vite:config hasSideEffects: [Function: hasSideEffects],
vite:config webResolvedImports: {},
vite:config nodeResolvedImports: {},
vite:config setResolvedCache: [Function: setResolvedCache],
vite:config getResolvedCache: [Function: getResolvedCache]
vite:config },
vite:config set: [Function (anonymous)]
vite:config },
vite:config createResolver: [Function: createResolver],
vite:config worker: {
vite:config format: 'iife',
vite:config plugins: [
vite:config 'vite:build-metadata',
vite:config 'vite:watch-package-data',
vite:config 'vite:pre-alias',
vite:config 'alias',
vite:config 'vite:modulepreload-polyfill',
vite:config 'vite:resolve',
vite:config 'vite:html-inline-proxy',
vite:config 'vite:css',
vite:config 'vite:esbuild',
vite:config 'vite:json',
vite:config 'vite:wasm-helper',
vite:config 'vite:worker',
vite:config 'vite:asset',
vite:config 'vite:wasm-fallback',
vite:config 'vite:define',
vite:config 'vite:css-post',
vite:config 'vite:build-html',
vite:config 'vite:worker-import-meta-url',
vite:config 'vite:asset-import-meta-url',
vite:config 'vite:force-systemjs-wrap-complete',
vite:config 'commonjs',
vite:config 'vite:data-uri',
vite:config 'vite:worker-post',
vite:config 'vite:dynamic-import-vars',
vite:config 'vite:import-glob',
vite:config 'vite:build-import-analysis',
vite:config 'vite:esbuild-transpile',
vite:config 'vite:load-fallback'
vite:config ],
vite:config rollupOptions: {},
vite:config getSortedPlugins: [Function: getSortedPlugins],
vite:config getSortedPluginHooks: [Function: getSortedPluginHooks]
vite:config },
vite:config appType: 'spa',
vite:config experimental: { importGlobRestoreExtension: false, hmrPartialAccept: false },
vite:config getSortedPlugins: [Function: getSortedPlugins],
vite:config getSortedPluginHooks: [Function: getSortedPluginHooks]
vite:config } +18ms
vite v4.3.9 building for production...
transforming (1) index.html vite:esbuild 334.94ms tsconfck init /home/projects/vitejs-vite-pj3wxw +0ms
✓ 9 modules transformed.
dist/manifest.json 0.41 kB │ gzip: 0.19 kB
dist/index.html 0.45 kB │ gzip: 0.30 kB
dist/assets/javascript-8dac5379.svg 1.00 kB │ gzip: 0.60 kB
dist/assets/index-c8247773.css 1.63 kB │ gzip: 0.75 kB
dist/assets/index-d9330be8.js 2.95 kB │ gzip: 1.29 kB │ map: 3.06 kB
✓ built in 720ms
Describe the bug
Hi everyone 👋
I'm trying to workaround #13401 by manually listing CSS Modules I want to manipulate on the client-side but the contents of the transformed asset differs between
vite devandvite build, to be more specific, indevthe CSS class names are property hashed as I would expect for a.module.cssfile but they are not aftervite build.For the reproduction project, I have an
Isolated.module.cssfile:Which I'm importing as follows:
Then I'm logging the URL string, fetching such file, and redering its contents on the page:
Reproduction
https://stackblitz.com/edit/vitejs-vite-pj3wxw?file=main.js
Steps to reproduce
Open the reproduction project.
You will see the content of the CSS Module on the page. CSS Class Names will be hashed, e.g.:
Open a new Terminal in the StackBlitz UI and run the preview script:
It will compile and serve the compiled project on port
4173and StackBlitz should replace the browser view on the right side to point to the new port automatically.On the new page you will see that the CSS Class Names are not hashed, e.g.:
System Info
System: OS: Linux 5.0 undefined CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz Memory: 0 Bytes / 0 Bytes Shell: 1.0 - /bin/jsh Binaries: Node: 16.14.2 - /usr/local/bin/node Yarn: 1.22.19 - /usr/local/bin/yarn npm: 7.17.0 - /usr/local/bin/npm npmPackages: vite: ^4.3.9 => 4.3.9Used Package Manager
npm
Logs
Validations