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#RUN REACT NATIVE ON ANDROID EMULATOR MAC FULL#
#RUN REACT NATIVE ON ANDROID EMULATOR MAC CODE#

To debug the JavaScript code in Chrome, select "Debug JS Remotely" from the Developer Menu. RedBoxes and YellowBoxes are automatically disabled in release (production) builds. In CI/Xcode, YellowBoxes can also be disabled by setting the IS_TESTING environment variable. Specific warnings can be ignored programmatically by setting an array of prefixes that should be ignored: console.ignoredYellowBox =. YellowBoxes can be disabled during development by using console.disableYellowBox = true. Click on the alerts to show more information or to dismiss them.Īs with a RedBox, you can use console.warn() to trigger a YellowBox.

Warnings will be displayed on screen with a yellow background. You can use console.error() to manually trigger one.

#RUN REACT NATIVE ON ANDROID EMULATOR MAC FULL#

In-app errors are displayed in a full screen alert with a red background inside your app.

You have modified native code (Objective-C/Swift on iOS or Java/C++ on Android).Įrrors and warnings are displayed inside your app in development builds.

You have added new resources to your native app's bundle, such as an image in Images.xcassets on iOS or the res/drawable folder on Android.

You will need to rebuild your app for changes to take effect in certain situations: If you run into any issues, use a full reload to reset your app. There are some instances where hot reloading cannot be implemented perfectly. This will allow you to persist the app's state through reloads. You may even go a step further and keep your app running as new versions of your files are injected into the JavaScript bundle automatically by enabling Hot Reloading from the Developer Menu. Automatic reloading can be enabled by selecting "Enable Live Reload" from the Developer Menu. You can speed up your development times by having your app reload automatically any time your code changes. You can also press ⌘R in the iOS Simulator, or tap R twice on Android emulators. To do so, select "Reload" from the Developer Menu. Instead of recompiling your app every time you make a change, you can reload your app's JavaScript code instantly. The Developer Menu is disabled in release (production) builds.

Alternatively for Android, you can run the command adb shell input keyevent 82 to open the dev menu (82 being the Menu key code). You can also use the ⌘D keyboard shortcut when your app is running in the iOS Simulator, or ⌘M when running in an Android emulator. You can access the developer menu by shaking your device or by selecting "Shake Gesture" inside the Hardware menu in the iOS Simulator. To enable them, open the Hardware menu, select Keyboard, and make sure that "Connect Hardware Keyboard" is checked. React Native supports a few keyboard shortcuts in the iOS Simulator.