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Development

After forking the repo from GitHub and installing pnpm:

git clone https://github.com/<your-name-here>/template-typescript-node-package
cd template-typescript-node-package
pnpm install

This repository includes a list of suggested VS Code extensions. It's a good idea to use VS Code and accept its suggestion to install them, as they'll help with development.

Building

Run TypeScript locally to type check and build source files from src/ into output files in lib/:

pnpm build --watch

You should also see suggestions from TypeScript in your editor.

Formatting

Prettier is used to format code. It should be applied automatically when you save files in VS Code or make a Git commit.

To manually reformat all files, you can run:

pnpm format:write

Linting

This package includes several forms of linting to enforce consistent code quality and styling. Each should be shown in VS Code, and can be run manually on the command-line:

  • pnpm lint:knip (knip): Detects unused files, dependencies, and code exports
  • pnpm lint:md (Markdownlint): Checks Markdown source files
  • pnpm lint:package (npm-package-json-lint): Lints the package.json file
  • pnpm lint:packages (pnpm dedupe --check): Checks for unnecessarily duplicated packages in the pnpm-lock.yml file
  • pnpm lint:spelling (cspell): Spell checks across all source files
  • pnpm lint (ESLint with typescript-eslint): Lints JavaScript and TypeScript source files

Testing

Vitest is used for tests. You can run it locally on the command-line:

pnpm run test

Add the --coverage flag to compute test coverage and place reports in the coverage/ directory:

pnpm run test --coverage

Note that console-fail-test is enabled for all test runs. Calls to console.log, console.warn, and other console methods will cause a test to fail.

Debugging Tests

This repository includes a VS Code launch configuration for debugging unit tests. To launch it, open a test file, then run Debug Current Test File from the VS Code Debug panel (or press F5).