How to create minimal TypeScript project

• mkdir minimal-ts && cd minimal-ts
• yarn init --yes to init project and create a package.json
• yarn add typescript -D to add the tsc
• Add tsc script into the package.json
• yarn tsc --init to generate the tsconfig.json file
• Created index.ts file with an hello world arrow-function
• yarn tsc to generate the index.js transpiled file

Input (index.ts):

const helloWorld = () => {
  console.log("hello world");
};

Output (index.js):

"use strict";
var helloWorld = function () {
  console.log("hello world");
};