Use isDragging instead of isDragSource

Author: clauderic

.changeset/accessibility-aria-grabbed.md

@@ -0,0 +1,5 @@
+---
+'@dnd-kit/dom': patch
+---
+
+Use the `draggable.isDragging` property instead of `draggable.isDragSource` to set `aria-grabbing` and `aria-pressed` attributes.

packages/dom/src/core/plugins/accessibility/Accessibility.ts

@@ -111,7 +111,7 @@ export class Accessibility extends Plugin<DragDropManager> {
           }
 
           for (const key of ['aria-pressed', 'aria-grabbed']) {
-            activator.setAttribute(key, String(draggable.isDragSource));
+            activator.setAttribute(key, String(draggable.isDragging));
           }
 
           activator.setAttribute('aria-disabled', String(draggable.disabled));