Just

Zero config TypeScript build and development toolkit.

Features

• Fast SWC compiler
• TypeScript type check support
• Live reload support
• .env file support
• Path alias support
• Typescript script runner
• REPL support

Install

# Locally in your project.
npm install -D @sonnyt/just

# Or globally
npm install -g @sonnyt/just

Usage

To start a dev server in the root of your project just (😉) run:

just dev

To build:

just build

Commands

Build

just build [options] [files]

Compiles the application for production deployment.

Arguments

• files - glob file path to compile. If not present, includes from config.json is used.

Options

Dev

just dev [options] [entry]

Starts the application in development mode. Watches for any file changes and live reloads the server.

Arguments

• entry - server entry path to start. If not present, main from package.json is used.

Options

Run

just run [options] <command> [args...]

Runs .ts file scripts.

Arguments

• <command> - script/command to run.
• [args...] - arguments passed to the script/command.

Options

Programmatic

You can require Just runner programmatically two ways:

Import Just as early as possible in your application code.

require('@sonnyt/just/register');

Or you can use the --require (-r) command line option to preload Just. By doing this, you do not need to require and load Just in your application code.

node -r @sonnyt/just/register myscript.ts

Please note that runner does not support type checking.

Default Config File

Just automatically finds and loads tsconfig.json or jsconfig.json. By default, this search is performed relative to the entrypoint script. If neither file is found nor the file is not provided as an argument. Just falls back to using default settings.

{
  "compilerOptions": {
    "module": "CommonJS",
    "target": "ES2021",
    "moduleResolution": "Node",
    "inlineSourceMap": true,
    "strict": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "importHelpers": true,
    "outDir": "dist",
    "paths": {}
  },
  "include": ["./"],
  "exclude": ["node_modules"]
}

Environment Variables

When using the dev or run commands. Just automatically finds and loads environment variables from a .env file into process.env. By default, this search is performed relative to the entrypoint script.

Path Alias

Based on the paths configuration, Just replaces all alias paths with relative paths after typescript compilation.

FAQ

...

Roadmap

• Build watch option
• Init option - copy over the default config file to the working directory.
• TypeScript ESLint support
• Prettier support
• jsconfig.json support
• .swcrc support