tsconfig.json

{
  "compilerOptions": {
    "jsx": "react",
    "jsxFactory": "React.createElement",
    "jsxFragmentFactory": "React.Fragment",
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "isolatedModules": true,
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "alwaysStrict": true,
    "forceConsistentCasingInFileNames": true,
    "importsNotUsedAsValues": "error",
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "noPropertyAccessFromIndexSignature": true,
    "noUncheckedIndexedAccess": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "strict": true,
    "allowJs": true,
    "declaration": true,
    "emitDeclarationOnly": true,
    "outDir": "types",
    "declarationMap": true,
    "lib": [
      "esnext",
      "dom",
      "dom.iterable",
      "scripthost"
    ],
    "types": [
      "jest"
    ]
  },
  "include": [
    "./src/**/*.ts",
    "./src/**/*.tsx"
  ]
}