tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "esnext",
    "module": "esnext",
    "lib": ["dom", "dom.iterable", "esnext"],
    "allowJs": false,
    "checkJs": false,
    "resolveJsonModule": true,
    "jsx": "preserve",
    "declaration": true,
    "declarationMap": false,
    "sourceMap": false,
    // "outFile": "./",
    // "outDir": "lib",
    // "rootDir": "./",
    // "composite": true,
    // "removeComments": true,
    "noEmit": true,
    // "importHelpers": true,
    // "downlevelIteration": true,
    "isolatedModules": true,
    "skipLibCheck": true,

    /* Strict Type-Checking Options */
    "strict": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "noImplicitThis": true,
    "alwaysStrict": true,
    "forceConsistentCasingInFileNames": true,

    /* Additional Checks */
    // "noUnusedLocals": true,
    // "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,

    /* Module Resolution Options */
    "moduleResolution": "node",
    "baseUrl": "src",
    // "paths": {},
    // "rootDirs": [],
    // "typeRoots": [],
    // "types": [],
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    // "preserveSymlinks": true,

    /* Source Map Options */
    // "sourceRoot": "./",
    // "mapRoot": "./",
    // "inlineSourceMap": true,
    // "inlineSources": true,

    /* Advanced Options */
    // "declarationDir": "lib",

    /* Experimental Options */
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  },
  "include": ["src"]
}