TypeScript Single Package Project Template

This template provides an opinionated setup for a single package TypeScript project.

🚀 Features

• PNPM for efficient package management
• Biome for linting and formatting
• Vitest for fast, modern testing
• tsdown for TypeScript building and bundling
• tsx for running TypeScript files
• Husky for Git hooks
• GitHub Actions for continuous integration
• VSCode debug configuration and editor settings
• @total-typescript/tsconfig for TypeScript configuration
• Are The Types Wrong? for type validation
• publint for package.json validation
• EditorConfig for consistent coding styles

🚀 Getting Started

1. Create a new repository

Create a new repository using this template

2. Replace placeholders

Replace all occurences of the following placeholders with the correct values:

Placeholder	File	Description
<PACKAGE>	package.json	Your package name
<DESCRIPTION>	package.json	Your package description
<USERNAME>	package.json	Your GitHub username
<REPO>	package.json	Your repository name
<AUTHOR>	package.json	Your name
<LICENSE>	package.json	Your license

3. Apply ToDos

Find all occurrences of TODO and apply them:

TODO	File	Description
TODO: PREVIEW	.github/workflows/ci.yml	Create preview releases
TODO: PUBLISH	.github/workflows/ci.yml	Publish to NPM

4. Install, Build, Test

Verify your project is working by running install, build, and test:

pnpm install
pnpm build
pnpm test

Happy coding! 🎉

📋 Details

Package

The package.json is configured as ESM ("type": "module"), but supports dual publishing with both ESM and CJS module formats.

Biome

biome.jsonc contains the default Biome configuration with minimal formatting adjustments. It uses the formatter settings from the .editorconfig file.

Vitest

An empty Vitest config is provided in vitest.config.ts.

Build and Run

• tsdown builds ./src/index.ts, outputting an ES module to the dist folder.
• tsx compiles and runs TypeScript files on-the-fly.

Git Hooks

Husky runs the .husky/pre-commit hook to lint staged files.

Continuous Integration

.github/workflows/ci.yml defines a GitHub Actions workflow to run linting and tests on commits and pull requests.

VSCode Integration

Debugging

.vscode/launch.json provides VSCode launch configurations:

• Debug (tsx): Run and debug TypeScript files
• Test (vitest): Debug tests

It uses the JavaScript Debug Terminal to run and debug.

Editor Settings

.vscode/settings.json configures Biome as the formatter and enables format-on-save.

EditorConfig

.editorconfig ensures consistent coding styles across different editors and IDEs:

• Uses spaces for indentation (2 spaces)
• Sets UTF-8 charset
• Ensures LF line endings
• Trims trailing whitespace (except in Markdown files)
• Inserts a final newline in files

This configuration complements Biome and helps maintain a consistent code style throughout the project.

Types Validation

The project includes the @arethetypeswrong/cli CLI tool to validate TypeScript types in your package. It is integrated into tsdown and will run automatically during the build

Publint

The project includes publint to validate your package.json file. It is integrated into tsdown and will run automatically during the build.

Optional

Publish to NPM

JS-DevTools/npm-publish is a GitHub Action to publish packages to npm automatically by updating the version number.

To enable this, apply the TODO: PUBLISH.

Preview Releases

pkg.pr.new will automatically generate preview releases for every push and pull request. This allows you to test changes before publishing to npm.

Must install GitHub App: pkg.pr.new

To enable this, apply the TODO: PREVIEW.