tsconfig.json

{
  "compilerOptions": {
    "lib": ["es2015", "dom", "dom.iterable"],
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "target": "es5",
    "jsx": "react-jsx",
    "allowJs": true,
    "emitDecoratorMetadata": false,
    "experimentalDecorators": false,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true,
    "isolatedModules": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "pretty": true,
    "preserveWatchOutput": false,
    "removeComments": true,
    "sourceMap": true,
    "skipLibCheck": true,
    "strict": true,
    "strictNullChecks": true,
    "stripInternal": true
  }
}