TypeScript — Compiler

Key options

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "commonjs",
    "lib": ["ES2020", "DOM"],
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "outDir": "./dist",
    "rootDir": "./src",
    "sourceMap": true,
    "declaration": true
  }
}

Target options

Target	Description
ES5	Legacy browsers
ES2015	ES6
ES2020	Modern browsers
ESNext	Latest features

Module options

Module	Description
commonjs	Node.js
es2015	ES modules
es2020	Modern ES
amd	RequireJS
umd	Universal

Strict options

{
  "compilerOptions": {
    "strict": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictBindCallApply": true
  }
}

Mini Practice

1. Set target
2. Configure modules
3. Enable strict mode
4. Configure output

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