TYPESCRIPT

react-native-typescript

//following command will work
npx --ignore-existing react-native init MyApp --template react-native-template-typescript

add typescript to react-native

yarn add -D typescript @types/jest @types/react @types/react-native @types/react-test-renderer

react-native use typescript

yarn add --dev typescript @types/jest @types/react @types/react-native @types/react-test-renderer
# or for npm
npm install --save-dev typescript @types/jest @types/react @types/react-native @types/react-test-renderer

react-native use typescript

module.exports = {
  preset: 'react-native',
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node']
};

react-native use typescript

{
  "compilerOptions": {
    "allowJs": true,
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "isolatedModules": true,
    "jsx": "react",
    "lib": ["es6"],
    "moduleResolution": "node",
    "noEmit": true,
    "strict": true,
    "target": "esnext"
  },
  "exclude": [
    "node_modules",
    "babel.config.js",
    "metro.config.js",
    "jest.config.js"
  ]
}

add typescript to react-native

module.exports = {  preset: 'react-native',  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node']};