xtsjs

Fast TypeScript build tool powered by esbuild. Zero configuration needed.

Features

• 🚀 Fast builds powered by esbuild
• 📦 Works out of the box without tsconfig.json
• 📘 TypeScript declaration files (.d.ts) generation
• ✅ Optional type checking with --typecheck
• 🎯 ESM and CommonJS output support

Installation

npm install --save-dev xtsjs

Optional: Install TypeScript for declaration files and type checking:

npm install --save-dev typescript

For type checking: If you want IDE support (VS Code IntelliSense, etc.) or build/CI type checking with --typecheck, you'll need a tsconfig.json. Generate one with xtsjs init.

Usage

CLI

# Build with defaults (src -> dist)
xtsjs

# Run type checking before build
xtsjs --typecheck

# Custom directories
xtsjs --src src --out dist

# Output CommonJS format instead of ESM
xtsjs --cjs

# Enable source maps
xtsjs --sourcemap

# Generate a tsconfig.json
xtsjs init

Programmatic API

import { xtsjs } from "xtsjs";

await xtsjs({
  srcDir: "src",
  outDir: "dist",
  typecheck: true,
  format: "esm",
});

Options

CLI Options

• -s, --src <dir> - Source directory (default: src)
• -o, --out <dir> - Output directory (default: dist)
• -t, --target <ver> - Node.js target version (default: node18)
• -d, --declaration - Generate .d.ts files (default: true)
• --sourcemap - Enable source maps (default: false)
• --cjs - Output CommonJS format (default: ESM)
• --typecheck - Run type checking before build (requires tsconfig.json)

API Options

interface XtsjsOptions {
  srcDir?: string; // default: 'src'
  outDir?: string; // default: 'dist'
  target?: string; // default: 'node18'
  sourcemap?: boolean; // default: false
  declaration?: boolean; // default: true
  format?: 'esm' | 'cjs'; // default: 'esm'
  typecheck?: boolean; // default: false
  esbuildOptions?: Partial<BuildOptions>;
}

Package.json Scripts

{
  "type": "module",
  "scripts": {
    "build": "xtsjs",
    "build:check": "xtsjs --typecheck"
  }
}

Notes

By default, xtsjs rewrites .ts imports to .js in the output. If you prefer to handle this yourself (e.g., with TypeScript 5.7+ rewriteRelativeImportExtensions), you can use esbuild directly or pass custom esbuild options.

License

MIT