TypeScript Cheat Sheet

Install TypeScript globally

npm install -g typescript

Initialize TypeScript project

npx tsc --init

Compile TypeScript file

tsc app.ts

Run compiled JavaScript

node app.js

Essential tsconfig.json

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "commonjs",
    "lib": ["ES2020"],
    "outDir": "./dist",
    "rootDir": "./src",
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "dist"]
}

Topics

Basic Types Functions Interfaces & Types Classes Generics Utility Types Type Guards Modules