tsconfig.json

{
  "compilerOptions": {
    // opinionated rules
    "strict": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "allowUnreachableCode": false,
    "forceConsistentCasingInFileNames": true,
    
    // config
    "allowJs": true,
    "sourceMap": true,
    "skipLibCheck": true,
    "declaration": true,
    "importHelpers": true,
    "resolveJsonModule": true,
    "moduleResolution": "node",
    "module": "commonjs",
    "outDir": "dist",
    "rootDir": "src",
    "target": "es5",
    "esModuleInterop": true,
    "lib": ["dom", "dom.iterable", "esnext"],
    "typeRoots": ["src/types", "node_modules/@types"],
  },
  "include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.js", "src/**/*.jsx"],
  "exclude": ["./node_modules"]
}