tsconfig.json

{
  "compilerOptions": {
    "sourceMap": true,
    "removeComments": true,

    "noImplicitAny": false,
    "strict": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "noImplicitThis": true,
    "alwaysStrict": true,

    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "skipLibCheck": true,

    "composite": true,
    "target": "es5",
    "module": "es2015",
    "outDir": "dist",
    "experimentalDecorators": true,
    "jsx": "react",
    "lib": ["dom", "es2015", "es2016"],
    "allowSyntheticDefaultImports": true,
    "moduleResolution": "node",
    "noEmitHelpers": true,
    "importHelpers": true,
    "esModuleInterop": true,
    "declaration": true
  },
  "exclude": ["node_modules"]
}