Backspace in DartPad on Android Doesn't Move Cursor to Previous Line

[md-rifatkhan]

When using DartPad on an Android device with Gboard, the backspace key does not move the cursor to the end of the previous line once the current line is empty. Instead, the cursor remains at the start of the line and keyboard suddenly closes, making it difficult to delete code across multiple lines smoothly.

Steps to Reproduce:

1. Open DartPad on an Android device.

2. Enter code across multiple lines.

3. Place the cursor at the beginning of a line with code on the line above.

4. Press the backspace key repeatedly.

Expected Behavior:

When the line becomes empty, the cursor should automatically move to the end of the previous line to allow seamless backspacing across lines.

Actual Behavior:

The cursor remains on the same line after it becomes empty, disrupting the flow of deleting code line-by-line.

Environment:

Device: Android

Keyboard: Gboard

Browser: Chrome 130.0.6723.86

OS: Android 11