Flutter input field maxlines dynamic change

flutter TextFormField maxLines max
Enter the box height ( Row number ) There is no limit on the , Or restricted by parent component

TextField(maxLines: null)

Enter the box height ( Row number ) Fix 2 That's ok

TextField(maxLines: 2)

Enter the box height ( Row number ) Minimum display 2 Line height , Maximum display 4 That's ok

TextField(minLines: 2, maxLines: 4)

Reference material :
https://api.flutter.dev/flutter/material/TextField/maxLines.html