What is form field in Flutter?

A single form field. This widget maintains the current state of the form field, so that updates and validation errors are visually reflected in the UI . When used inside a Form, you can use methods on FormState to query or manipulate the form data as a whole. For example, calling FormState.

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Does Flutter have drag-and-drop?

Flutter provides a widget called LongPressDraggable that provides the exact behavior that you need to begin a drag-and-drop interaction . A LongPressDraggable widget recognizes when a long press occurs and then displays a new widget near the user’s finger. As the user drags, the widget follows the user’s finger.

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