vite: `require is not defined` when importing a node_module that imports a CSS file

Describe the bug

When importing a react component that imports a CSS file, vite fails with the message:

Uncaught ReferenceError: require is not defined

If you dig into the stack trace, you’ll see that the require statement is from an imported .css file (line 8 in this image):

Screen Shot 2021-05-13 at 2 09 02 PM

This issue:

  • Does not occur when running with create-react-app or storybook
  • Occurs with any NPM dependency that imports a .css file. We discovered this issue with an internal component library, originally, but were able to reproduce it with react-date-picker, which also imports a .css file.

I expected this to work, as the documentation references being able to manage imported static assets like this: https://vitejs.dev/guide/features.html#css. But, perhaps there’s an issue when the CSS import occurs in a vendor/node_module.

Reproduction

https://github.com/blimmer/show-vite-issue

git clone https://github.com/blimmer/show-vite-issue.git
cd show-vite-issue
npm ci
npm run dev

You’ll observe the error in the console when you visit localhost:3000:

Screen Shot 2021-05-13 at 2 04 20 PM

System Info

Output of npx envinfo --system --npmPackages vite,@vitejs/plugin-vue --binaries --browsers:

  System:
    OS: macOS 11.3.1
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
    Memory: 32.71 MB / 32.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 16.1.0 - ~/.asdf/installs/nodejs/16.1.0/bin/node
    Yarn: 1.22.10 - /usr/local/bin/yarn
    npm: 7.11.2 - ~/.asdf/installs/nodejs/16.1.0/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Browsers:
    Firefox: 89.0
  npmPackages:
    vite: ^2.3.0 => 2.3.2

Used package manager: npm

Logs

 vite build --debug
  vite:config bundled config file loaded in 84ms +0ms
  vite:config using resolved config: {
  vite:config   plugins: [
  vite:config     'alias',
  vite:config     'react-refresh',
  vite:config     'vite:dynamic-import-polyfill',
  vite:config     'vite:resolve',
  vite:config     'vite:html',
  vite:config     'vite:css',
  vite:config     'vite:esbuild',
  vite:config     'vite:json',
  vite:config     'vite:wasm',
  vite:config     'vite:worker',
  vite:config     'vite:asset',
  vite:config     'vite:define',
  vite:config     'vite:css-post',
  vite:config     'vite:build-html',
  vite:config     'commonjs',
  vite:config     'vite:data-uri',
  vite:config     'rollup-plugin-dynamic-import-variables',
  vite:config     'vite:import-analysis',
  vite:config     'vite:esbuild-transpile',
  vite:config     'vite:terser',
  vite:config     'vite:reporter'
  vite:config   ],
  vite:config   build: {
  vite:config     target: [ 'es2019', 'edge88', 'firefox78', 'chrome87', 'safari13.1' ],
  vite:config     outDir: 'dist',
  vite:config     assetsDir: 'assets',
  vite:config     assetsInlineLimit: 4096,
  vite:config     cssCodeSplit: true,
  vite:config     sourcemap: false,
  vite:config     rollupOptions: {},
  vite:config     commonjsOptions: { include: [Array], extensions: [Array] },
  vite:config     minify: 'terser',
  vite:config     terserOptions: {},
  vite:config     cleanCssOptions: {},
  vite:config     write: true,
  vite:config     emptyOutDir: null,
  vite:config     manifest: false,
  vite:config     lib: false,
  vite:config     ssr: false,
  vite:config     ssrManifest: false,
  vite:config     brotliSize: true,
  vite:config     chunkSizeWarningLimit: 500,
  vite:config     watch: null
  vite:config   },
  vite:config   configFile: '/private/tmp/show-vite-issue/vite.config.ts',
  vite:config   configFileDependencies: [ '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: '/private/tmp/show-vite-issue',
  vite:config   base: '/',
  vite:config   resolve: { dedupe: undefined, alias: [ [Object] ] },
  vite:config   publicDir: '/private/tmp/show-vite-issue/public',
  vite:config   cacheDir: '/private/tmp/show-vite-issue/node_modules/.vite',
  vite:config   command: 'build',
  vite:config   mode: 'production',
  vite:config   isProduction: true,
  vite:config   server: { fsServe: { root: '/private/tmp/show-vite-issue', strict: false } },
  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   },
  vite:config   createResolver: [Function: createResolver],
  vite:config   optimizeDeps: { esbuildOptions: { keepNames: undefined } }
  vite:config } +5ms
vite v2.3.2 building for production...
✓ 121 modules transformed.
dist/assets/favicon.17e50649.svg   1.49kb
dist/assets/logo.ecc203fb.svg      2.61kb
dist/index.html                    0.57kb
dist/assets/index.0673ce28.css     0.76kb / brotli: 0.40kb
dist/assets/index.2146aa06.js      0.94kb / brotli: 0.38kb
dist/assets/vendor.d4d14e00.css    4.08kb / brotli: 0.91kb
dist/assets/vendor.771a2d12.js     228.14kb / brotli: 53.29kb

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  • 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.
  • Provide a description in this issue that describes the bug.
  • 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 https://github.com/vuejs/vue-next instead.
  • Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.

About this issue

  • Original URL
  • State: closed
  • Created 3 years ago
  • Reactions: 5
  • Comments: 23 (6 by maintainers)

Commits related to this issue

Most upvoted comments

You can try this plugin https://github.com/originjs/vite-plugins/tree/main/packages/vite-plugin-commonjs

import { defineConfig } from 'vite'
import reactRefresh from '@vitejs/plugin-react-refresh'
import { esbuildCommonjs } from '@originjs/vite-plugin-commonjs'

export default defineConfig({
  plugins: [reactRefresh()],
  optimizeDeps:{
    esbuildOptions:{
      plugins:[
        esbuildCommonjs(['react-calendar','react-date-picker'])
      ]
    }
  }
})

vite-plugin-commonjs only works in vite dev mode, theoretically vite can support require in build mode. Refer to this issue https://github.com/originjs/vite-plugins/issues/9

as a workaround, you can disable the require call in react-date-picker and try import the css file in your code:

index.html

<head>
<script>window.require = () => {}</script>
<script type="module" src="src/main.js"></script>
</head>

src/main.js

import 'react-calendar/dist/Calendar.css'

// ...

This happens not only for css files but also for json files wich are loaded by require. In an ideal world we would rewrite this. In real world this is a big problem wich needs to be solved by the tool…

@ygj6 thanks for the link to that plugin! I have a naive question, but I thought that vitejs did “automatic ESM-ification” of all of my dependencies automatically (via esbuild)? Or is that not right?

Just wondering why I’d have to configure the vite-plugin-commonjs plugin for these specific dependencies.

Thanks!

Same issue! Resolved by vite configuration instead of configure any third party dependency! Include dep which you intend to be auto transformed like below:

export default defineConfig({
  optimizeDeps: {
    include: ['linked-dep']
  },
}

Referenced document: monorepos-and-linked-dependencies My understanding : vite “automatic ESM-ification” happened during dep-pre-bundling, and vite could not understand all dep senario (eg: mono or linked dep etc), so it provide a manual channel for us to config which to pre-bundle

Can someone clarify that we must configure vite-plugin-commonjs for all packages that use require? I have a dependency (okta-auth-js) with a sub dependency (js-cookie) that uses require.

My dev build works fine, but I get this error in the production build. React_App

Vite use esbuild for pre-bundling. However, esbuild will not transform require https://github.com/evanw/esbuild/issues/506. The vite-plugin-commonjs plugin will replace require to import, which can solve most scenarios (NOT All).

@gonzalojpv nope, I went back to react-scripts for the time being. It sounds like it’s something that the library itself might need to address and I can’t afford to get blocked by unsupported dependencies.

Looks like the error comes up because esbuild pre-bundles react-date-picker into:

// node_modules/.pnpm/react-date-picker@8.4.0_react-dom@17.0.2+react@17.0.2/node_modules/react-date-picker/dist/entry.js
var require_entry = __commonJS({
  "node_modules/.pnpm/react-date-picker@8.4.0_react-dom@17.0.2+react@17.0.2/node_modules/react-date-picker/dist/entry.js"(exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", {
      value: true
    });
    exports["default"] = void 0;
    __require("/Users/bjorn/Work/repros/show-vite-issue/node_modules/.pnpm/react-calendar@3.7.0_react-dom@17.0.2+react@17.0.2/node_modules/react-calendar/dist/Calendar.css");
    var _DatePicker = _interopRequireDefault(require_DatePicker());
    __require("/Users/bjorn/Work/repros/show-vite-issue/node_modules/.pnpm/react-date-picker@8.4.0_react-dom@17.0.2+react@17.0.2/node_modules/react-date-picker/dist/DatePicker.css");
    function _interopRequireDefault(obj) {
      return obj && obj.__esModule ? obj : { "default": obj };
    }
    var _default = _DatePicker["default"];
    exports["default"] = _default;
  }
});

Where __require is the normal CJS require. Ideally, this should be an import (top-level) so that it goes through Vite’s asset pipeline. Not really sure how to fix this though.

@ChuckJonas do you found any fix? I have same problem

vendor.53605c38.js:7 Uncaught ReferenceError: require is not defined Screen Shot 2022-02-02 at 10 20 44

@ygj6 thanks for the link to that plugin! I have a naive question, but I thought that vitejs did “automatic ESM-ification” of all of my dependencies automatically (via esbuild)? Or is that not right?

Just wondering why I’d have to configure the vite-plugin-commonjs plugin for these specific dependencies.

Thanks!

add transformMixedEsModules to vite.config

build: {
    commonjsOptions: {
      transformMixedEsModules: true
    }
  }