dnd_kit_core

dnd_kit_core contains the pure Dart foundation for dnd_kit.

Use this package when you need drag-and-drop primitives, runtime, geometry, collision detection, modifiers, registry contracts, or sensor contracts without depending on Flutter.

Import

import 'package:dnd_kit_core/dnd_kit_core.dart';

What It Provides

  • DndId for stable application-owned identifiers.
  • DndPoint, DndSize, DndRect, and DndTransform for toolkit geometry.
  • DndState, DndDragSession, and drag events for lifecycle modeling.
  • DndRuntime as the shared framework-neutral drag engine.
  • DndCollisionDetector plus built-in detectors such as DndCollisionDetectors.closestCenter, DndCollisionDetectors.closestCorners, DndCollisionDetectors.rectIntersection, and DndCollisionDetectors.pointerWithin.
  • DndModifier plus built-in modifiers such as DndModifiers.restrictToVerticalAxis, DndModifiers.restrictToHorizontalAxis, DndModifiers.restrictToBoundary, and DndModifiers.snapToGrid.
  • DndRegistry and diagnostics hooks for draggable and droppable metadata.
  • DndMeasuringRegistry, sortable move/strategy math, and auto-scroll edge/velocity helpers shared by adapters.

Package Boundary

dnd_kit_core intentionally has no Flutter dependency. It does not import package:flutter/*, dart:ui, BuildContext, RenderBox, Offset, Rect, or Size.

Flutter widgets, measuring, overlays, auto-scroll, and stable sortable presets live in the dnd_kit_flutter adapter (re-exported by dnd_kit).

dnd_kit family

Package Use it for
dnd_kit Flutter apps — the stable, recommended Flutter entry point (re-exports dnd_kit_flutter).
dnd_kit_flutter Flutter apps that want dev releases or the explicit adapter package.
dnd_kit_jaspr Jaspr (Dart web) apps — the current dev adapter release.
dnd_kit_core The shared, framework-agnostic engine.

Libraries

dnd_kit_core
Pure Dart core primitives and algorithms for dnd_kit.