kazuya

Runtime Typescript and ESM support for Node.js.

Why Kazuya? Why not jiti?

Kazuya is forked from jiti. It uses sucrase instaed of babel.

Sucrase is an alternative to Babel that allows super-fast development builds. It has better performance and smaller size, and supports only a subset of features to help you avoid unnecessary transforms.

Pros:

Faster loading time
Smaller bundle size

Cons:

Less features (Does not support import.meta and decorators)
No support for older node versions
No sourcemap support
No custom transform support

Features

Seamless typescript and ESM syntax support
Seamless interoperability between ESM and CommonJS
Synchronous API to replace require
Super slim and zero dependency
Smart syntax detection to avoid extra transforms
CommonJS cache integration
Filesystem transpile hard cache
V8 compile cache
Custom resolve alias

Usage

Programmatic

const { createKazuya } = require("kazuya");

const kazuya = createKazuya(__filename);

kazuya("./path/to/file.ts");

You can also pass options as second argument:

const { createKazuya } = require("kazuya");

const kazuya = createKazuya(__filename, { debug: true });

CLI

kazuya index.ts
# or npx kazuya index.ts

Register require hook

node -r kazuya/register index.ts

Alternatively, you can register kazuya as a require hook programmatically:

const { createKazuya } = require("kazuya");

const kazuya = createKazuya();
const unregister = kazuya.register();

Options

`debug`

Type: Boolean
Default: false
Environment Variable: KAZUYA_DEBUG

Enable debug to see which files are transpiled.

`cache`

Type: Boolean | String
Default: true
Environment Variable: KAZUYA_CACHE

Use transpile cache

If set to true will use node_modules/.cache/kazuya (if exists) or {TMP_DIR}/node-kazuya.

`esmResolve`

Type: Boolean | String
Default: false
Environment Variable: KAZUYA_ESM_RESOLVE

Using esm resolution algorithm to support import condition.

`interopDefault`

Type: Boolean
Default: false

Return the .default export of a module at the top-level.

`alias`

Type: Object
Default: -
Environment Variable: KAZUYA_ALIAS

Custom alias map used to resolve ids.

`nativeModules`

Type: Array
Default: ["typescript"]
Environment Variable: KAZUYA_NATIVE_MODULES

List of modules (within node_modules) to always use native require for them.

`transformModules`

Type: Array
Default: []
Environment Variable: KAZUYA_TRANSFORM_MODULES

List of modules (within node_modules) to transform them regardless of syntax.

Development

Clone this repository
Enable Corepack using corepack enable
Install dependencies using pnpm install
Run pnpm watch
Run pnpm kazuya ./test/path/to/file.ts

so1ve / kazuya