tsconfig.base.json

{
  "$schema": "https://json.schemastore.org/tsconfig",
  "compilerOptions": {
    /* interop */
    "allowJs": true,
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "isolatedModules": true,

    /* code quality */
    "strict": true,
    "strictPropertyInitialization": false,

    // "exactOptionalPropertyTypes": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": false,
    // "noUncheckedIndexedAccess": true,
    "noUnusedLocals": true,
    "noUnusedParameters": false,
    "noPropertyAccessFromIndexSignature": true,
    "noImplicitOverride": true,
    "skipLibCheck": true,

    /* modules */
    "module": "ESNext",
    "moduleResolution": "nodenext",
    "resolveJsonModule": true,

    /* features */
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "declaration": true,
    "declarationMap": true,
    "jsx": "react-jsx",
    "lib": ["ESNext", "DOM", "DOM.Iterable"],
    "target": "ESNext",

    /* dev */
    "preserveWatchOutput": true
  }
}