TextInput behavior on programmatic value change differs between iOS/Android

[akalin-keybase]

• I have reviewed the documentation
• I have searched existing issues
• I am using the latest React Native version

If one has a TextInput and changes its value prop, selection behavior differs between iOS and Android. On iOS, the cursor jumps to the end. On Android, the cursor moves to the right by some varying amount.

Also, if the TextInput has focus, on iOS no onSelectionChange even is fired, but one is on Android.

Finally, it would be nice if it were documented somewhere that the initial selection is at the end of the initial value.

Environment

Environment:
OS: macOS High Sierra 10.13.3
Node: 9.9.0
Yarn: 1.5.1
npm: 5.8.0
Watchman: 4.9.0
Xcode: Xcode 9.2 Build version 9C40b
Android Studio: Not Found

Packages: (wanted => installed)
react: 16.3.0-alpha.1 => 16.3.0-alpha.1
react-native: 0.54.2 => 0.54.2

Steps to Reproduce

See https://snack.expo.io/BJUeRfw5M

Expected Behavior

Consistent behavior between platforms. Jumping to the end of the line/value, perhaps, and firing an onSelectionChange event.

Documentation stating that the initial selection is at the end of the initial value.

Actual Behavior

On iOS, the cursor jumps to the end of the line, or the end of the replace text, sometimes. On Android, the cursor moves to the right by some varying amount.

Also, if the TextInput has focus, on iOS no onSelectionChange even is fired, but one is on Android.

[akalin-keybase]

A workaround is just to set selection explicitly. But doing so runs into #18316 , which also has its own workaround. https://github.com/akalin-keybase/rn-text-input-bugs has a demo that implements these workarounds.

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as "For Discussion" or "Good first issue" and I will leave it open. Thank you for your contributions.

[akalin-keybase]

Not fixed AFAIK

[proof666]

any news on this issue?
I also ran into this problem, at least in part "if the TextInput has focus, on iOS no onSelectionChange even is fired" when programaticaly change value prop.

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[stale]

Closing this issue after a prolonged period of inactivity. If this issue is still present in the latest release, please feel free to create a new issue with up-to-date information.