tsconfig.json

{
  "include": [
    "./src/**/*.ts",
    "./rollup.config.ts"
  ],
  "exclude": [
    "./node_modules",
    "./dist",
    "./types"
  ],
  "compilerOptions": {
    // Type checking
    //--------------------------------------------------

    "allowUnreachableCode": false,
    "allowUnusedLabels": false,
    "alwaysStrict": true,
    "exactOptionalPropertyTypes": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitOverride": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noPropertyAccessFromIndexSignature": true,
    "noUncheckedIndexedAccess": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "strict": true,
    "strictBindCallApply": true,
    "strictFunctionTypes": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": true,
    "useUnknownInCatchVariables": true,

    // Modules
    //--------------------------------------------------

    "module": "ESNext",
    "moduleResolution": "node",
    "resolveJsonModule": true,

    // Emit
    //--------------------------------------------------

    "declaration": true,
    "declarationDir": "./types",
    "emitDeclarationOnly": true,
    "importHelpers": true,

    // Interop constraints
    //--------------------------------------------------

    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,

    // Language and environment
    //--------------------------------------------------

    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [
      "ESNext",
      "DOM"
    ],
    "target": "ES2021",

    // Projects
    //--------------------------------------------------

    "incremental": true,

    // Completeness
    //--------------------------------------------------

    "skipLibCheck": true
  }
}