when use css?url import css url,build result has empty duplicate css file

[huijiewei]

Describe the bug

open

https://stackblitz.com/edit/vitejs-vite-3maoaa?file=src%2Fmain.tsx&terminal=dev

in dist folder has Index-xxx.css and index-xxx.css

Index-xxx.css is import in main.tsx

import indexStyles from './Index.css?url';

index-xxx.css is empty file

Reproduction

https://stackblitz.com/edit/vitejs-vite-3maoaa?file=src%2Fmain.tsx&terminal=dev

Steps to reproduce

open new Terminal
npm run build

System Info

online demo

Used Package Manager

npm

Logs

vite:config bundled config file loaded in 109.36ms +0ms
vite:config using resolved config: {
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:react-babel',
vite:config 'vite:react-refresh',
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:terser',
vite:config 'vite:reporter',
vite:config 'vite:load-fallback'
vite: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: false,
vite:config rollupOptions: { onwarn: [Function: onwarn] },
vite:config minify: 'esbuild',
vite:config terserOptions: {},
vite:config write: true,
vite:config emptyOutDir: null,
vite:config copyPublicDir: true,
vite:config manifest: false,
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 commonjsOptions: { include: [Array], extensions: [Array] },
vite:config dynamicImportVarsOptions: { warnOnError: true, exclude: [Array] },
vite:config modulePreload: { polyfill: true },
vite:config cssMinify: true
vite:config },
vite:config esbuild: { jsxDev: false, jsx: 'automatic', jsxImportSource: undefined },
vite:config optimizeDeps: {
vite:config holdUntilCrawlEnd: true,
vite:config esbuildOptions: { preserveSymlinks: false, jsx: 'automatic' },
vite:config include: [ 'react', 'react/jsx-dev-runtime', 'react/jsx-runtime' ]
vite:config },
vite:config resolve: {
vite:config mainFields: [ 'browser', 'module', 'jsnext:main', 'jsnext' ],
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: [ 'react', 'react-dom' ],
vite:config preserveSymlinks: false,
vite:config alias: [ [Object], [Object] ]
vite:config },
vite:config configFile: '/home/projects/vitejs-vite-3maoaa/vite.config.ts',
vite:config configFileDependencies: [ '/home/projects/vitejs-vite-3maoaa/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 build: {}
vite:config },
vite:config root: '/home/projects/vitejs-vite-3maoaa',
vite:config base: '/',
vite:config rawBase: '/',
vite:config publicDir: '/home/projects/vitejs-vite-3maoaa/public',
vite:config cacheDir: '/home/projects/vitejs-vite-3maoaa/node_modules/.vite',
vite:config command: 'build',
vite:config mode: 'production',
vite:config ssr: {
vite:config target: 'node',
vite:config optimizeDeps: { noDiscovery: true, esbuildOptions: [Object] }
vite:config },
vite:config isWorker: false,
vite:config mainConfig: null,
vite:config isProduction: true,
vite:config css: { lightningcss: undefined },
vite:config server: {
vite:config preTransformRequests: true,
vite:config sourcemapIgnoreList: [Function: isInNodeModules$1],
vite:config middlewareMode: false,
vite:config fs: {
vite:config strict: true,
vite:config allow: [Array],
vite:config deny: [Array],
vite:config cachedChecks: undefined
vite:config }
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-3maoaa',
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-3maoaa' => {
vite:config dir: '/home/projects/vitejs-vite-3maoaa',
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: { format: 'iife', plugins: '() => plugins', rollupOptions: {} },
vite:config appType: 'spa',
vite:config experimental: { importGlobRestoreExtension: false, hmrPartialAccept: false },
vite:config getSortedPlugins: [Function: getSortedPlugins],
vite:config getSortedPluginHooks: [Function: getSortedPluginHooks]
vite:config } +3ms
vite v5.1.0 building for production...
✓ 36 modules transformed.
dist/index.html 0.46 kB │ gzip: 0.30 kB
dist/assets/react-h3aPdYU7.svg 4.13 kB │ gzip: 2.14 kB
dist/assets/index-f0mNRiTD.css 0.00 kB │ gzip: 0.02 kB
dist/assets/App-cfVfczdt.css 0.48 kB │ gzip: 0.31 kB
dist/assets/Index-T74ItOsL.css 0.92 kB │ gzip: 0.50 kB
dist/assets/index-8Vc5CAFy.js 143.59 kB │ gzip: 46.22 kB
✓ built in 551ms

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
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• The provided reproduction is a minimal reproducible example of the bug.

[stackblitz]

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• vitejs-vite-3maoaa (Open reproduction)