# esm-loader-typescript

> Chainable ESModule Loader for Typescript

Latest version **1.0.6** (published 2023-11-01) · MIT license · 0 weekly downloads

## Install

```sh
npm install esm-loader-typescript
pnpm add esm-loader-typescript
yarn add esm-loader-typescript
bun add esm-loader-typescript
```

## Health

**Score 30/100 (F)** — status: abandoned.

Positive: has types; esm support; no vulnerabilities; high quality score.

Warnings: low downloads.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.0.6 |
| Published | 2023-11-01 |
| First published | 2022-02-01 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Dependencies | 4 |
| Unpacked size | 7.2 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Author | Brev Patterson |
| Maintainers | brev |
| Keywords | esm, esmodule, loader, chainable, import, typescript |

## Links

- npm: https://www.npmjs.com/package/esm-loader-typescript
- Repository: https://github.com/brev/esm-loaders
- Homepage: https://github.com/brev/esm-loaders/tree/main/packages/esm-loader-typescript#readme
- Issues: https://github.com/brev/esm-loaders/issues
- npm.io page: https://npm.io/package/esm-loader-typescript

## Dependencies (4)

- [semver](https://npm.io/package/semver.md) ^7.5.4
- [typescript](https://npm.io/package/typescript.md) ^5.2.2
- [npm-run-all](https://npm.io/package/npm-run-all.md) ^4.1.5
- [create-esm-loader](https://npm.io/package/create-esm-loader.md) ^0.2.5

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## Recent versions

- 1.0.6 (latest) — 2023-11-01
- 1.0.5 — 2023-06-30
- 1.0.4 — 2023-03-23
- 1.0.3 — 2022-09-23
- 1.0.2 — 2022-08-30
- 1.0.1 — 2022-02-12
- 1.0.0 — 2022-02-11
- 0.0.2 — 2022-02-09
- 0.0.1 — 2022-02-01

## README

# esm-loader-typescript

[Node.js ESModule Loader][node-loaders] for importing and loading
Typescript (`.ts`) files and transpiling on the fly.

**Warning!** Using experimental Node.js features and flags,
API will likely change. This may be helpful for development and testing,
but should not be used in production.

## Usage

```sh
npm install --save-dev esm-loader-typescript
```

We want to import a `.ts` file with Node.js:

```ts
// index.ts
const words: string = 'hello'
console.log(words)
// 'hello'
```

### Standalone

```sh
# node >= 20.7
cat << EOF > ./register.js
import { register } from 'node:module'
register('esm-loader-typescript', import.meta.url)
EOF
NODE_OPTIONS="--import ./register.js" node index.ts

# node < 20.7
NODE_OPTIONS="--loader esm-loader-typescript" node index.ts
```

### Chainable

This loader can be configured, and chained with other loaders, using
[node-esm-loader][node-esm-loader].

```sh
npm install --save-dev node-esm-loader
```

```js
// .loaderrc.js
export default {
  loaders: ['esm-loader-typescript'],
}
```

```sh
# node >= 20.7
NODE_OPTIONS="--import node-esm-loader/register" node index.ts

# node < 20.7
NODE_OPTIONS="--loader node-esm-loader" node index.ts
```

#### Options

##### Config

You may specify a custom TypeScript config filename to use:

```js
// .loaderrc.js
export default {
  loaders: [
    {
      loader: 'esm-loader-typescript',
      options: {
        config: 'tsconfig-custom.json',
      },
    },
  ],
}
```

Otherwise, if a `tsconfig.json` file is found, it will be loaded and used.

##### Debug

```js
// .loaderrc.js
export default {
  loaders: [
    {
      loader: 'esm-loader-typescript',
      options: {
        debug: true,
      },
    },
  ],
}
```

## Related

- [esm-loader-import-relative-extension][esm-loader-import-relative-extension]

## License

[MIT][mit-license]

[esm-loader-import-relative-extension]: https://github.com/brev/esm-loaders/tree/main/packages/esm-loader-import-relative-extension#readme
[mit-license]: https://mit-license.org/
[node-esm-loader]: https://github.com/sebamarynissen/node-esm-loader#readme
[node-loaders]: https://nodejs.org/api/esm.html#loaders

---
_Source: https://npm.io/package/esm-loader-typescript · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._