tsconfig.json

{
  "compilerOptions": {
    "rootDir": "./",
    "noEmit": true,
    "target": "ESNext",
    "module": "NodeNext",
    "lib": ["ESNext", "DOM", "DOM.Iterable"],
    "jsx": "react-jsx",
    "strict": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "skipLibCheck": true,
    "isolatedModules": true,
    "noUncheckedSideEffectImports": true,
    "noUnusedLocals": true,
    "noUncheckedIndexedAccess": true,
    "noImplicitOverride": true,
    "allowImportingTsExtensions": true,

    // so that the compiled code has the correct paths (`import './a.ts'` >> `import './a.js'`)
    "rewriteRelativeImportExtensions": true,

    // to make code comply with the "no-slow-types" rule from JSR
    "isolatedDeclarations": true,

    // because "isolatedDeclarations" does not work without it
    "declaration": true,

    // import types only with type keyword
    "verbatimModuleSyntax": true,

    // no enums, namespaces, parameter properties, etc
    "erasableSyntaxOnly": true
  },
  "exclude": ["node_modules", "public/typings", "tests-pkg", "tests-e2e", "docs", "dist"]
}