tsconfig.json

{
  "compilerOptions": {
    "allowJs": false,
    "allowUnreachableCode": false,
    "allowUnusedLabels": false,
    "allowUmdGlobalAccess": false,
    "target": "ES2015",
    "declaration": true,
    "declarationMap": true,
    "importHelpers": true,
    "skipLibCheck": true,
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "jsx": "react-jsx",
    "emitDeclarationOnly": true,
    "declarationDir": "./dist",
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictBindCallApply": true,
    "strictPropertyInitialization": true,
    "alwaysStrict": true,
    "noImplicitAny": true,
    "downlevelIteration": true,
    "lib": [
      "dom",
      "dom.iterable",
      "esnext"
    ]
  },
  "include": [
    "src"
  ]
}