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# draggable(_:id:item:containerNamespace:)

Activates this view as the source of a drag and drop operation,
allowing to provide optional payload and specify the namespace of
the drag container this view belongs to.

```
nonisolated func draggable<Item, ItemID>(_ itemType: Item.Type = Item.self, id: KeyPath<Item, ItemID>, item: @autoclosure @escaping () -> Item?, containerNamespace: Namespace.ID? = nil) -> some View where Item : Transferable, ItemID : Hashable, ItemID : Sendable
```

## Parameters

`itemType`

A type of the dragged item.

`id`

An identifier of an item.

`item`

A closure that returns a single
instance or a value conforming to
<doc://com.apple.documentation/documentation/CoreTransferable/Transferable>
that represents the draggable data from this view.

`containerNamespace`

A namespace of the associated drag container.

## Return Value

A view that activates this view as the source of a drag and
drop operation, beginning with user gesture input.

## Discussion

Applying the `draggable(_:containerNamespace_:)` modifier adds
the appropriate gestures for
drag and drop to this view. When a drag operation begins, a rendering of
this view is generated and used as the preview image.

To customize the default preview, apply a
[`contentShape(_:_:eoFill:)`](/documentation/SwiftUI/View/contentShape(_:_:eoFill:)) with a
[`dragPreview`](/documentation/SwiftUI/ContentShapeKinds/dragPreview) kind. For example, you can change the
preview’s corner radius or use a nested view as the preview.

---

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