TypeScript - Setup

init new project

mkdir <project>
cd <project>
npm init
npm install -E -D typescript ts-node-dev @types/node
npm install -E -D eslint eslint-plugin-node
npm install -E -D jest ts-jest @types/jest
npm install -E -D rimraf
npx tsc --init

tsconfig settings

node v12

See tsconfig-node12.json

Described in StackOverflow TypeScript tsconfig settings for Node.js 12?

node v14

See tsconfig-node14.json

Besides the settings in tsconfig it is also necessary to add type: module in package.json to use ES2020 module loading.

Described in StackOverflow What TypeScript configuration produces output closest to Node.js 14 capabilities?

Export types

The 30-second guide to publishing a TypeScript package to NPM