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ANNOUNCEMENT

DO NOT MODIFY OR CHANGE THE CODE BEFORE CONFIRMED BY DOOBOOLAB. THIS REPOSITORY IS USED IN DOOBOO-CLI.

React Native TS Boilerplate

Specification

• react-native
• react-navigation
• typescript
• fbt
• emotion
• dooboo-ui
• ts-jest
• react-hook
• @testing-library/react-native
• @testing-library/react-hooks
• prettier

Gain points

1. Sample of context-api with `react-hook` (`useContext`).
2. Know how to structure react native app with typescript.
3. Know how to navigate between screens with `react-navigation`.
4. Know how to write test code with `testing-library`.
5. Know how to `lint` your project with `eslint` for both `ts` and maybe some `js`.
6. Know how to localize your project.

INSTALL

npm install && npm start
// or
yarn && yarn start

Structures

app/
├─ .doobooo // necessary if using dooboo-cli
├─ assets
│  └─ icons // app icons
│  └─ images // app images like background images
├─ node_modules/
├─ src/
│  └─ apis
│  └─ components
│     └─ navigations
│     └─ screen
│     └─ shared
│  └─ providers
│  └─ utils
│  └─ App.tsx
├─ test/
├─ .buckconfig
├─ .flowconfig
├─ .gitattributes
├─ .gitignore
├─ .watchmanconfig
├─ app.json
├─ babel.config.js
├─ index.js
├─ jest.config.js
├─ package.json
├─ README.md
├─ STRINGS.js
├─ tsconfig.json
└─ eslint.json

Running the project

Running the project is as simple as running

npm run start

This runs the start script specified in our package.json, and will spawn off a server which reloads the page as we save our files. Typically the server runs at http://localhost:8080, but should be automatically opened for you.

Post Installation - iOS

step 1

If you get error about Flipper when your first build, Replace all Podfile code in ios to below.

```
  require_relative '../node_modules/react-native/scripts/react_native_pods'
  require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'
  platform :ios, '11.0'
  target '<Your projectName>' do
     config = use_native_modules!
     use_react_native!(
      :path => config[:reactNativePath],
      # to enable hermes on iOS, change `false` to `true` and then install pods
      :hermes_enabled => false
    )
    pod 'RNVectorIcons', :path => '../node_modules/react-native-vector-icons'
    target '<Your projectName>Tests' do
      inherit! :complete
       # Pods for testing
    end
    # Enables Flipper.
    #
    # Note that if you have use_frameworks! enabled, Flipper will not work and
    # you should disable the next line.
    use_flipper!({'Flipper' => '0.87.0'})
    post_install do |installer|
      react_native_post_install(installer)
      installer.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
          config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '11.0'
          config.build_settings["ONLY_ACTIVE_ARCH"] = "YES"
          config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64"
        end
      end
    end
  end
```

After replace a code, remove Podfile.lock & Pods. then run npx pod-install to applying.

** Note that you should replace a <Your projectName> field to your real project name.

step 2

To use dooboo-ui you have to follow the steps below

1. Create fonts folder in ios, then add doobooui.ttf in node_modules/dooboo-ui/Icons/ to it.
2. Add folder reference with xcode.

Detail

Add files to ...

Select fonts folder you're added, then press Add

3. Add a following code to info.plist in ios/project.xcassets. you can see doobooui.ttf on the bottom.

   Code

   <key>UIAppFonts</key>
   <array>
     <string>AntDesign.ttf</string>
     <string>Entypo.ttf</string>
     <string>EvilIcons.ttf</string>
     <string>Feather.ttf</string>
     <string>FontAwesome.ttf</string>
     <string>FontAwesome5_Brands.ttf</string>
     <string>FontAwesome5_Regular.ttf</string>
     <string>FontAwesome5_Solid.ttf</string>
     <string>Fontisto.ttf</string>
     <string>Foundation.ttf</string>
     <string>Ionicons.ttf</string>
     <string>MaterialCommunityIcons.ttf</string>
     <string>MaterialIcons.ttf</string>
     <string>Octicons.ttf</string>
     <string>SimpleLineIcons.ttf</string>
     <string>Zocial.ttf</string>
     <string>doobooui.ttf</string>
   </array>
   

4. Add doobooui.ttf to build pharses - copy bundle Resource

Image

5. Run npx pod-install and Happy code!

Testing the project

Testing is also just a command away:

npm test

Result

> jest -u

 PASS  src/components/shared/__tests__/Button.test.tsx
 PASS  src/components/screen/__tests__/Intro.test.tsx
 › 2 snapshots written.

Snapshot Summary
 › 2 snapshots written in 1 test suite.

Test Suites: 2 passed, 2 total
Tests:       5 passed, 5 total
Snapshots:   2 added, 4 passed, 6 total
Time:        3.055s, estimated 6s
Ran all test suites

Writing tests with Jest

We've created test examples with jest-ts in src/components/screen/__tests__ and src/components/shared/__tests__. Since react is component oriented, we've designed to focus on writing test in same level of directory with component. You can simply run npm test to test if it succeeds and look more closer opening the source.

Vscode prettier and eslint setup

"eslint.enable": true,
"eslint.validate": [
    "javascript",
    "javascriptreact",
    "typescript",
    "typescriptreact"
],
// prettier extension setting
"editor.formatOnSave": true,
"[javascript]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
},
"[javascriptreact]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
},
"[typescript]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
},
"[typescriptreact]": {
    "editor.defaultFormatter": "esbenp.prettier-vscode"
},
"prettier.singleQuote": true,
"prettier.trailingComma": "all",
"prettier.arrowParens": "always",
"prettier.jsxSingleQuote": true

Using Context Api

Whenever you add your own Context provider you can add it to providers/ and use it inside of providers/index.tsx

• Splitting provider is preferred

// Add providers here
const RootProvider = ({
  initialThemeType,
  children,
}: Props): React.ReactElement => {
  return (
    <AppProvider>
      <ThemeProvider initialThemeType={initialThemeType}>
        {children}
      </ThemeProvider>
    </AppProvider>
  );
};

The RootProvider is being used at App.tsx and test files easily

// App.tsx
function App(): React.ReactElement {
  return (
    <RootProvider>
      <SwitchNavigator />
    </RootProvider>
  );
}

// test files
const component = (props): React.ReactElement => {
  return (
    <RootProvider initialThemeType>
      <Intro {...props} />
    </RootProvider>
  );
};

using consistent theme('light') explicitly is encouraged in testing for avoiding unexpected snapshot test errors

Localization

Previously, we used i18n-j to localize our app and we decided to switch to fbt. If you want to understand why, you may see our blog for Localizing react app with FBT instead of src/utils/i18n.

We've defined localized strings in assets/translations/en.json for English and assets/translations/ko.json for Korean. Since the en is default locale setup in current project, you do not need to localize this file. However, you still should not delete this if you don't want to see missing localization warning messages when you are running jest.

We are using fbt to localize our app which is maintained by Facebook team. Simply running yarn fbt:all will generate i18n/fbt/translatedFbts.json which has all the localized strings.

If you find trouble using it, you may follow Integrate FBT into your React Native Application.