unplugin-auto-import

What is unplugin-auto-import?

unplugin-auto-import is a powerful tool for automatically importing functions, components, and other modules in your JavaScript or TypeScript projects. It helps to reduce boilerplate code and improve development efficiency by eliminating the need to manually import frequently used modules.

What are unplugin-auto-import's main functionalities?

Automatic Import of Functions

Automatically imports functions from specified libraries (e.g., Vue and Vue Router) without needing to manually import them in each file.

module.exports = {
  plugins: [
    require('unplugin-auto-import/webpack')({
      imports: ['vue', 'vue-router'],
    }),
  ],
};

Custom Imports

Allows you to specify custom imports from libraries like Lodash, so you can use functions like debounce and throttle without manual imports.

module.exports = {
  plugins: [
    require('unplugin-auto-import/webpack')({
      imports: [
        {
          'lodash': [
            'debounce',
            'throttle'
          ]
        }
      ],
    }),
  ],
};

TypeScript Support

Generates TypeScript declaration files for the auto-imported modules, ensuring type safety and better development experience.

module.exports = {
  plugins: [
    require('unplugin-auto-import/webpack')({
      dts: true,
    }),
  ],
};

ESLint Integration

Integrates with ESLint to ensure that auto-imported modules are recognized and do not trigger linting errors.

module.exports = {
  plugins: [
    require('unplugin-auto-import/webpack')({
      eslintrc: {
        enabled: true,
      },
    }),
  ],
};

Other packages similar to unplugin-auto-import

babel-plugin-auto-import

babel-plugin-auto-import is a Babel plugin that automatically imports specified modules when they are used in your code. It is similar to unplugin-auto-import but is specifically designed to work with Babel, making it a good choice for projects that already use Babel for transpilation.

eslint-plugin-import

eslint-plugin-import is an ESLint plugin that helps manage and validate import statements in your code. While it does not automatically import modules, it provides rules to ensure that imports are correctly used and can help prevent common issues related to imports.

README

unplugin-auto-import

Auto import APIs on-demand for Vite, Webpack, Rspack, Rollup and esbuild. With TypeScript support. Powered by unplugin.

---

without

import { computed, ref } from 'vue'

const count = ref(0)
const doubled = computed(() => count.value * 2)

with

const count = ref(0)
const doubled = computed(() => count.value * 2)

---

without

import { useState } from 'react'

export function Counter() {
  const [count, setCount] = useState(0)
  return <div>{ count }</div>
}

with

export function Counter() {
  const [count, setCount] = useState(0)
  return <div>{ count }</div>
}

Install

npm i -D unplugin-auto-import

Vite

// vite.config.ts
import AutoImport from 'unplugin-auto-import/vite'

export default defineConfig({
  plugins: [
    AutoImport({ /* options */ }),
  ],
})

Example: playground/

Rollup

// rollup.config.js
import AutoImport from 'unplugin-auto-import/rollup'

export default {
  plugins: [
    AutoImport({ /* options */ }),
    // other plugins
  ],
}

Webpack

// webpack.config.js
module.exports = {
  /* ... */
  plugins: [
    require('unplugin-auto-import/webpack').default({ /* options */ }),
  ],
}

Rspack

// rspack.config.js
module.exports = {
  /* ... */
  plugins: [
    require('unplugin-auto-import/rspack').default({ /* options */ }),
  ],
}

Nuxt

You don't need this plugin for Nuxt, it's already built-in.

Vue CLI

// vue.config.js
module.exports = {
  /* ... */
  plugins: [
    require('unplugin-auto-import/webpack').default({ /* options */ }),
  ],
}

You can also rename the Vue configuration file to vue.config.mjs and use static import syntax (you should use latest @vue/cli-service ^5.0.8):

// vue.config.mjs
import AutoImport from 'unplugin-auto-import/webpack'

export default {
  configureWebpack: {
    plugins: [
      AutoImport({ /* options */ }),
    ],
  },
}

Quasar

// vite.config.js [Vite]
import AutoImport from 'unplugin-auto-import/vite'
import { defineConfig } from 'vite'

export default defineConfig({
  plugins: [
    AutoImport({ /* options */ })
  ]
})

// quasar.conf.js [Webpack]
const AutoImportPlugin = require('unplugin-auto-import/webpack').default

module.exports = {
  build: {
    chainWebpack(chain) {
      chain.plugin('unplugin-auto-import').use(
        AutoImportPlugin({ /* options */ }),
      )
    },
  },
}

esbuild

// esbuild.config.js
import { build } from 'esbuild'
import AutoImport from 'unplugin-auto-import/esbuild'

build({
  /* ... */
  plugins: [
    AutoImport({
      /* options */
    }),
  ],
})

Astro

// astro.config.mjs
import AutoImport from 'unplugin-auto-import/astro'

export default defineConfig({
  integrations: [
    AutoImport({
      /* options */
    })
  ],
})

Configuration

AutoImport({
  // targets to transform
  include: [
    /\.[tj]sx?$/, // .ts, .tsx, .js, .jsx
    /\.vue$/,
    /\.vue\?vue/, // .vue
    /\.md$/, // .md
  ],

  // global imports to register
  imports: [
    // presets
    'vue',
    'vue-router',
    // custom
    {
      '@vueuse/core': [
        // named imports
        'useMouse', // import { useMouse } from '@vueuse/core',
        // alias
        ['useFetch', 'useMyFetch'], // import { useFetch as useMyFetch } from '@vueuse/core',
      ],
      'axios': [
        // default imports
        ['default', 'axios'], // import { default as axios } from 'axios',
      ],
      '[package-name]': [
        '[import-names]',
        // alias
        ['[from]', '[alias]'],
      ],
    },
    // example type import
    {
      from: 'vue-router',
      imports: ['RouteLocationRaw'],
      type: true,
    },
  ],

  // Array of strings of regexes that contains imports meant to be filtered out.
  ignore: [
    'useMouse',
    'useFetch'
  ],

  // Enable auto import by filename for default module exports under directories
  defaultExportByFilename: false,

  // Options for scanning directories for auto import
  dirsScanOptions: {
    types: true // Enable auto import the types under the directories
  },

  // Auto import for module exports under directories
  // by default it only scan one level of modules under the directory
  dirs: [
    './hooks',
    './composables', // only root modules
    './composables/**', // all nested modules
    // ...

    {
      glob: './hooks',
      types: true // enable import the types
    },
    {
      glob: './composables',
      types: false // If top level dirsScanOptions.types importing enabled, just only disable this directory
    }
    // ...
  ],

  // Filepath to generate corresponding .d.ts file.
  // Defaults to './auto-imports.d.ts' when `typescript` is installed locally.
  // Set `false` to disable.
  dts: './auto-imports.d.ts',

  // Array of strings of regexes that contains imports meant to be ignored during
  // the declaration file generation. You may find this useful when you need to provide
  // a custom signature for a function.
  ignoreDts: [
    'ignoredFunction',
    /^ignore_/
  ],

  // Auto import inside Vue template
  // see https://github.com/unjs/unimport/pull/15 and https://github.com/unjs/unimport/pull/72
  vueTemplate: false,

  // Auto import directives inside Vue template
  // see https://github.com/unjs/unimport/pull/374
  vueDirectives: undefined,

  // Custom resolvers, compatible with `unplugin-vue-components`
  // see https://github.com/antfu/unplugin-auto-import/pull/23/
  resolvers: [
    /* ... */
  ],

  // Include auto-imported packages in Vite's `optimizeDeps` options
  // Recommend to enable
  viteOptimizeDeps: true,

  // Inject the imports at the end of other imports
  injectAtEnd: true,

  // Generate corresponding .eslintrc-auto-import.json file.
  // eslint globals Docs - https://eslint.org/docs/user-guide/configuring/language-options#specifying-globals
  eslintrc: {
    enabled: false, // Default `false`
    // provide path ending with `.mjs` or `.cjs` to generate the file with the respective format
    filepath: './.eslintrc-auto-import.json', // Default `./.eslintrc-auto-import.json`
    globalsPropValue: true, // Default `true`, (true | false | 'readonly' | 'readable' | 'writable' | 'writeable')
  },

  // Generate corresponding .biomelintrc-auto-import.json file.
  // biomejs extends Docs - https://biomejs.dev/guides/how-biome-works/#the-extends-option
  biomelintrc: {
    enabled: false, // Default `false`
    filepath: './.biomelintrc-auto-import.json', // Default `./.biomelintrc-auto-import.json`
  },

  // Save unimport items into a JSON file for other tools to consume
  dumpUnimportItems: './auto-imports.json', // Default `false`
})

Refer to the type definitions for more options.

Presets

See src/presets.

Package Presets

We only provide presets for the most popular packages, to use any package not included here you can install it as dev dependency and add it to the packagePresets array option:

AutoImport({
  /* other options */
  packagePresets: ['detect-browser-es'/* other local package names */]
})

You can check the Svelte example for a working example registering detect-browser-es package preset and auto importing detect function in App.svelte.

Please refer to the unimport PackagePresets jsdocs for more information about options like ignore or cache.

Note: ensure local packages used have package exports configured properly, otherwise the corresponding modules exports will not be detected.

TypeScript

In order to properly hint types for auto-imported APIs

Enable options.dts so that auto-imports.d.ts file is automatically generated Make sure auto-imports.d.ts is not excluded in tsconfig.json

AutoImport({ dts: true // or a custom path })

ESLint

💡 When using TypeScript, we recommend to disable no-undef rule directly as TypeScript already check for them and you don't need to worry about this.

If you have encountered ESLint error of no-undef:

Enable eslintrc.enabled

AutoImport({ eslintrc: { enabled: true, // <-- this }, })

Update your eslintrc: Extending Configuration Files

// .eslintrc.js module.exports = { extends: [ './.eslintrc-auto-import.json', ], }

FAQ

Compare to unimport

From v0.8.0, unplugin-auto-import uses unimport underneath. unimport is designed to be a lower-level tool (it also powered Nuxt's auto import). You can think unplugin-auto-import is a wrapper of it that provides more user-friendly config APIs and capabilities like resolvers. Development of new features will mostly happen in unimport from now.

Compare to vue-global-api

You can think of this plugin as a successor to vue-global-api, but offering much more flexibility and bindings with libraries other than Vue (e.g. React).

Pros

• Flexible and customizable
• Tree-shakable (on-demand transforming)
• No global population

Cons

• Relying on build tools integrations (while vue-global-api is pure runtime) - but hey, we have supported quite a few of them already!

Sponsors

License

MIT License © 2021-PRESENT Anthony Fu