Undefined is not an object (evaluating '_reactNative.Image.resizeMode.stretch')

[1fabiopereira]

Environment

React Native Environment Info:
    System:
      OS: macOS High Sierra 10.13.6
      CPU: x64 Intel(R) Core(TM) i5-4278U CPU @ 2.60GHz
      Memory: 30.31 MB / 8.00 GB
      Shell: 3.2.57 - /bin/bash
    Binaries:
      Node: 8.9.1 - /usr/local/bin/node
      npm: 5.5.1 - /usr/local/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 11.4, macOS 10.13, tvOS 11.4, watchOS 4.3
      Android SDK:
        Build Tools: 23.0.1, 23.0.3, 25.0.0, 25.0.1, 25.0.2, 25.0.3, 26.0.0, 26.0.1, 26.0.2, 26.0.3, 27.0.0, 27.0.1, 27.0.2, 27.0.3
        API Levels: 21, 22, 23, 24, 25, 26, 27
    IDEs:
      Android Studio: 3.1 AI-173.4819257
      Xcode: 9.4.1/9F2000 - /usr/bin/xcodebuild
    npmPackages:
      react: ^16.2.0 => 16.4.1
      react-native: ^0.56.0 => 0.56.0
    npmGlobalPackages:
      react-native-cli: 2.0.1
      react-native-git-upgrade: 0.2.7
      react-native-rename: 2.1.5

Description

I did the react-native upgrade to 0.56 after compiling on the android I get the following error when trying to open the application:

E/ReactNativeJS: undefined is not an object (evaluating '_reactNative.Image.resizeMode.stretch')
E/unknown:ReactNative: Unable to launch redbox because react activity is not available, here is the error that redbox would've displayed: undefined is not an object (evaluating '_reactNative.Image.resizeMode.stretch')

[JimmiHagen]

my code uses Image.resizeMode.cover and triggers the same error after upgrade, also on Android.

[kebernet]

Anything here?

[kelset]

That's because since 0.56 Image.resizeMode is not exposed anymore. You just need to use the string value instead.