A resolver for jest that uses the same strategy as TS when resolving files with JavaScript extensions (".js", ".jsx", ".cjs" and ".mjs"). It works pretty well with ts-jest or babel with @babel/preset-typescript.
- 📦 Distributions in ESM and CommonJS.
- Supports both Node.js ESM (import/export) and CommonJS (require/module.exports).
- ⚡ Lightweight:
- It's bundled using rollup.js.
- 🔋 Bateries included:
- It just depends on
jest-resolvertypes.
- It just depends on
- ✅ Safe:
- Made with ESLint, TypeScript as strict as possible.
- Unit tests with Jest.
- Like
ts-jest,ts-jest-resolveruses itself as jest's resolver.
This library is published in the NPM registry and can be installed using any compatible package manager.
npm install ts-jest-resolver --save
# For Yarn, use the command below.
yarn add ts-jest-resolverAfter installation, you can set "ts-jest-resolver" as jest's resolver.
// jest.config.js
module.exports = {
preset: "ts-jest",
resolver: "ts-jest-resolver",
};It changes module's extension to resolve in the same way as TypeScript.
When importing from path with JavaScript extension (".js" or ".jsx"):
import EventEmitter from './EventEmitter.js';-
It tries to resolve to a path with ".tsx";
import EventEmitter from './EventEmitter.tsx';
-
If no file was found, it tries to resolve to a path with ".ts";
import EventEmitter from './EventEmitter.ts';
-
If no file was found, it resolves to original path (with ".js" or ".jsx").
import EventEmitter from './EventEmitter.js';
When importing from path with ES or CommonJS modules (".mjs" and ".cjs" respectively):
Ex.
import parse, { Tokenizer } from './parser.mjs'
import { discoverPath } from './getFiles.cjs';-
It tries to resolve to paths with ".mts" and ".cts".
Ex.
import parse, { Tokenizer } from './parser.mts' import { discoverPath } from './getFiles.cts';
-
If no files were found, it resolves to original paths (with ".mjs" and ".cjs").
Ex.
import parse, { Tokenizer } from './parser.mjs' import { discoverPath } from './getFiles.cjs';
Released under MIT License.
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