tsconfig.json

{
  "compilerOptions": {
    "allowJs": false,
    "declaration": true,
    "rootDir": "src",
    "outDir": "dist/types",
    "target": "ES2020",
    "useDefineForClassFields": true,
    "module": "ESNext",
    "lib": ["ES2020", "DOM", "DOM.Iterable"],
    "skipLibCheck": true,

    /* Bundler mode */
    "isolatedModules": true,
    "emitDeclarationOnly": true,

    /* Linting */
    "strict": true,

    "noFallthroughCasesInSwitch": true,
    "noErrorTruncation": true,
    "moduleResolution": "bundler"
  },
  "include": ["src"],
  "exclude": ["src/dev.dist.ts"]
}