Bug - Can not disable Bounce in ScrollView when Horizontal=true

[stephanoparaskeva]

I need to create a component that is Horizontally scrollable. However you cannot stop vertical bouncing, when you just want horizontal scrollability.

Despite this, the docs say:

alwaysBounceVertical
When true, the scroll view bounces vertically when it reaches the end 
even if the content is smaller than the scroll view itself. The default value 
is false when horizontal={true} and true otherwise.

    <ScrollView
      horizontal={true}
      onScrollEndDrag={increment}
      alwaysBounceVertical={false}
      bounces={false}
      showsHorizontalScrollIndicator={false}
      contentContainerStyle={{ flex: 1 }}
      style={{ flex: 1 }}>
      <View style={styles.container}>
        <TimeTableView
          events={events_data}
          firstHour={0}
          finalHour={25}
          titleCutoff={1}
          pastFutureIterator={iteration}
          numOfCalendarDays={7}
          onEventPress={onEventPress}
          headerStyle={styles.headerStyle}
        />
      </View>
    </ScrollView>

Am not able to disable bouncing effect, or the movement that you see. It should be optional to disable.

Ver: 0.62
Info

info Fetching system and libraries information...
System:
    OS: macOS 10.15.4
    CPU: (8) x64 Intel(R) Core(TM) i7-8569U CPU @ 2.80GHz
    Memory: 21.36 MB / 16.00 GB
    Shell: 5.8 - /usr/local/bin/zsh
  Binaries:
    Node: 13.12.0 - ~/.nvm/versions/node/v13.12.0/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.4 - ~/.nvm/versions/node/v13.12.0/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Managers:
    CocoaPods: 1.9.1 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: iOS 13.4, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
    Android SDK:
      API Levels: 28, 29
      Build Tools: 28.0.3, 29.0.3
      System Images: android-29 | Google Play Intel x86 Atom
      Android NDK: Not Found
  IDEs:
    Android Studio: 3.6 AI-192.7142.36.36.6392135
    Xcode: 11.4.1/11E503a - /usr/bin/xcodebuild
  Languages:
    Java: 1.8.0_252 - /usr/bin/javac
    Python: 2.7.17 - /usr/local/bin/python
  npmPackages:
    @react-native-community/cli: Not Found
    react: 16.11.0 => 16.11.0 
    react-native: 0.62.2 => 0.62.2 
  npmGlobalPackages:
    *react-native*: Not Found

Even with these props, nothing changes for vertical

      bounces={false}
      alwaysBounceVertical={false}
      scrollEnabled={false}
      bouncesZoom={false}

Steps to replicate:

1. Make any ScrollView
2. add content to the ScrollView
3. add prop 'Horizontal' to ScrollView
4. You can now no longer prevent vertical bouncing.

[github-actions]

⚠️	Missing Environment Information
ℹ️	Your issue may be missing information about your development environment. You can obtain the missing information by running react-native info in a console.

[stephanoparaskeva]

⚠️ Missing Environment Information
ℹ️ Your issue may be missing information about your development environment. You can obtain the missing information by running react-native info in a console.

Provided info, someone should remove 'Needs: Attention' as it does not, need attention.

[tayguohong]

I am also facing this issue when i trying to implement hide/show bottom tab bar in onScroll props. When it reached the end or top of the scroll view, it has a bouncing effect which will make the tab bar visible again at the end of scroll view, although it should be hidden actually. And I couldn't find any solution to disable this jumpy or bouncing effect.