eslint-import-resolver-typescript

This is a resolver for eslint-plugin-import(-x) plugin, not an ESLint plugin itself, it adds TypeScript support to eslint-plugin-import (Or maybe you want to try eslint-plugin-import-x for faster speed)

This means you can:

• import/require files with extension .cts/.mts/.ts/.tsx/.d.cts/.d.mts/.d.ts
• Use paths defined in tsconfig.json
• Prefer resolving @types/* definitions over plain .js/.jsx
• Multiple tsconfigs support just like normal
• imports/exports fields support in package.json

TOC

• Notice
• Installation
  • eslint-plugin-import-x
  • eslint-plugin-import
• Configuration
  • eslint.config.js
  • .eslintrc
  • Other environments
    • Bun
• Options from unrs-resolver
  • conditionNames
  • extensions
  • extensionAlias
  • mainFields
  • Other options
  • Default options
• Contributing
• Sponsors
• Backers
• Changelog
• License

Notice

After version 2.0.0, .d.ts will take higher priority then normal .js/.jsx files on resolving node_modules packages in favor of @types/* definitions or its own definition.

If you're facing some problems on rules import/default or import/named from eslint-plugin-import, do not post any issue here, because they are just working exactly as expected on our sides, take import-js/eslint-plugin-import#1525 as reference or post a new issue to eslint-plugin-import instead.

Installation

eslint-plugin-import-x

# npm
npm i -D eslint-plugin-import-x eslint-import-resolver-typescript

# pnpm
pnpm i -D eslint-plugin-import-x eslint-import-resolver-typescript

# yarn
yarn add -D eslint-plugin-import-x eslint-import-resolver-typescript

eslint-plugin-import

# npm
npm i -D eslint-plugin-import eslint-import-resolver-typescript

# pnpm
pnpm i -D eslint-plugin-import eslint-import-resolver-typescript

# yarn
yarn add -D eslint-plugin-import eslint-import-resolver-typescript

Configuration

eslint.config.js

If you are using eslint-plugin-import-x@>=4.5.0, you can use import/require to reference eslint-import-resolver-typescript directly in your ESLint flat config:

// eslint.config.js, CommonJS is also supported
import { createTypeScriptImportResolver } from 'eslint-import-resolver-typescript'

export default [
  {
    settings: {
      'import-x/resolver-next': [
        createTypeScriptImportResolver({
          alwaysTryTypes: true, // always try to resolve types under `<root>@types` directory even it doesn't contain any source code, like `@types/unist`

          bun: true, // resolve Bun modules https://github.com/import-js/eslint-import-resolver-typescript#bun

          // Choose from one of the "project" configs below or omit to use <root>/tsconfig.json or <root>/jsconfig.json by default

          // use <root>/path/to/folder/tsconfig.json or <root>/path/to/folder/jsconfig.json
          project: 'path/to/folder',

          // Multiple tsconfigs/jsconfigs (Useful for monorepos, but discouraged in favor of `references` supported)

          // use a glob pattern
          project: 'packages/*/{ts,js}config.json',

          // use an array
          project: [
            'packages/module-a/tsconfig.json',
            'packages/module-b/jsconfig.json',
          ],

          // use an array of glob patterns
          project: [
            'packages/*/tsconfig.json',
            'other-packages/*/jsconfig.json',
          ],
        }),
      ],
    },
  },
]

But if you are using eslint-plugin-import or the older version of eslint-plugin-import-x, you can't use require/import:

// eslint.config.js, CommonJS is also supported
export default [
  {
    settings: {
      'import/resolver': {
        typescript: {
          alwaysTryTypes: true, // always try to resolve types under `<root>@types` directory even it doesn't contain any source code, like `@types/unist`

          bun: true, // resolve Bun modules https://github.com/import-js/eslint-import-resolver-typescript#bun

          // Choose from one of the "project" configs below or omit to use <root>/tsconfig.json or <root>/jsconfig.json by default

          // use <root>/path/to/folder/tsconfig.json or <root>/path/to/folder/jsconfig.json
          project: 'path/to/folder',

          // Multiple tsconfigs/jsconfigs (Useful for monorepos, but discouraged in favor of `references` supported)

          // use a glob pattern
          project: 'packages/*/{ts,js}config.json',

          // use an array
          project: [
            'packages/module-a/tsconfig.json',
            'packages/module-b/jsconfig.json',
          ],

          // use an array of glob patterns
          project: [
            'packages/*/tsconfig.json',
            'other-packages/*/jsconfig.json',
          ],
        },
      },
    },
  },
]

.eslintrc

Add the following to your .eslintrc config:

{
  "plugins": ["import"],
  "rules": {
    // turn on errors for missing imports
    "import/no-unresolved": "error",
  },
  "settings": {
    "import/parsers": {
      "@typescript-eslint/parser": [".ts", ".tsx"],
    },
    "import/resolver": {
      "typescript": {
        "alwaysTryTypes": true, // always try to resolve types under `<root>@types` directory even it doesn't contain any source code, like `@types/unist`

        "bun": true, // resolve Bun modules https://github.com/import-js/eslint-import-resolver-typescript#bun

        // Choose from one of the "project" configs below or omit to use <root>/tsconfig.json or <root>/jsconfig.json by default

        // use <root>/path/to/folder/tsconfig.json or <root>/path/to/folder/jsconfig.json
        "project": "path/to/folder",

        // Multiple tsconfigs (Useful for monorepos, but discouraged in favor of `references` supported)

        // use a glob pattern
        "project": "packages/*/{ts,js}config.json",

        // use an array
        "project": [
          "packages/module-a/tsconfig.json",
          "packages/module-b/jsconfig.json",
        ],

        // use an array of glob patterns
        "project": [
          "packages/*/tsconfig.json",
          "other-packages/*/jsconfig.json",
        ],
      },
    },
  },
}

Other environments

Bun

Bun provides built-in modules such as bun:test, which are not resolved by default.

Enable Bun built-in module resolution by choosing 1 out of these 3 options:

• Set the bun: true option, as shown in Configuration above
• Run ESLint with bun --bun eslint
• Configure run.bun in bunfig.toml

Options from unrs-resolver

conditionNames

Default:

[
  "types",
  "import",

  // APF: https://angular.io/guide/angular-package-format
  "esm2020",
  "es2020",
  "es2015",

  "require",
  "node",
  "node-addons",
  "browser",
  "default",
]

extensions

Default:

[
  // `.mts`, `.cts`, `.d.mts`, `.d.cts`, `.mjs`, `.cjs` are not included because `.cjs` and `.mjs` must be used explicitly
  ".ts",
  ".tsx",
  ".d.ts",
  ".js",
  ".jsx",
  ".json",
  ".node",
]

extensionAlias

Default:

{
  ".js": [
    ".ts",
    // `.tsx` can also be compiled as `.js`
    ".tsx",
    ".d.ts",
    ".js",
  ],
  ".jsx": [".tsx", ".d.ts", ".jsx"],
  ".cjs": [".cts", ".d.cts", ".cjs"],
  ".mjs": [".mts", ".d.mts", ".mjs"],
}

mainFields

Default:

[
  "types",
  "typings",

  // APF: https://angular.io/guide/angular-package-format
  "fesm2020",
  "fesm2015",
  "esm2020",
  "es2020",

  "module",
  "jsnext:main",

  "main",
]

Other options

You can pass through other options of unrs-resolver directly

Default options

You can reuse defaultConditionNames, defaultExtensions, defaultExtensionAlias and defaultMainFields by require/import them directly

Contributing

• Make sure your change is covered by a test import.
• Make sure that yarn test passes without a failure.
• Make sure that yarn lint passes without conflicts.
• Make sure your code changes match our type-coverage settings: yarn type-coverage.

We have GitHub Actions which will run the above commands on your PRs.

If either fails, we won't be able to merge your PR until it's fixed.

Sponsors

1stG	RxTS	UnTS

Backers

1stG	RxTS	UnTS

Changelog

Detailed changes for each release are documented in CHANGELOG.md.

License

ISC