tsconfig.json

{
  "compilerOptions": {
    // Target latest version of ECMAScript.
    "target": "esnext",
    // Search under node_modules for non-relative imports.
    "moduleResolution": "node",
    // Process & infer types from .js files.
    "allowJs": false,
    // Don't emit; allow Babel to transform files.
    "noEmit": true,
    // Enable strictest settings like strictNullChecks & noImplicitAny.
    "strict": true,
    // Disallow features that require cross-file information for emit.
    "isolatedModules": true,
    // Import non-ES modules as default imports.
    "esModuleInterop": true,

    "jsx": "react-native",
    "sourceMap": true,
    "rootDir": "src",
    "baseUrl": "./src",

    "noImplicitAny": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "importHelpers": true,
    "alwaysStrict": true,
    "forceConsistentCasingInFileNames": true,
    "strictFunctionTypes": true,
    "noFallthroughCasesInSwitch": true,
    "strictNullChecks": true,
    "allowSyntheticDefaultImports": true,
    "lib": [ "es6" ],
    "paths": {
      "*": ["*", "*.ios", "*.android"]
    }
  },
  "filesGlob": [
    "typings/index.d.ts",
    "src/**/*.ts",
    "src/**/*.tsx",
    "node_modules/typescript/lib/lib.es6.d.ts"
  ],
  "include": ["src/**/*"],
  "exclude":[
    "build",
    "node_modules",
    "jest.config.js",
    "src/App.js"
  ],
  "types": [
    "react",
    "react-native"
  ]
}