tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "allowSyntheticDefaultImports": true,
    "alwaysStrict": true,
    "baseUrl": ".",
    "diagnostics": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "isolatedModules": true,
    "jsx": "react",
    "keyofStringsOnly": true,
    "lib": ["es6", "es7", "dom"],
    "module": "esnext",
    "moduleResolution": "node",
    "noEmitHelpers": false,
    "noEmitOnError": false,
    "noErrorTruncation": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "preserveConstEnums": true,
    "pretty": true,
    "removeComments": false,
    "skipDefaultLibCheck": true,
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "target": "esnext"
  },
  "exclude": ["node_modules"]
}