Drag and Drop

This page describes how to enable drag and drop functionality for the various React Spectrum components that support it.

Introduction#

Drag and drop is a common UI interaction that allows users to transfer data between two locations by directly moving a visual representation on screen. It is a flexible, efficient, and intuitive way for users to perform a variety of tasks, and is widely supported across both desktop and mobile operating systems. In addition to the standard mouse and touch interactions, React Spectrum also implements keyboard and screen reader accessible alternatives for drag and drop to enable all users to perform these tasks.

Drag and Drop Concepts#

Before we dive into how to enable drag and drop in React Spectrum, let's touch briefly on the terminology and concepts of drag and drop. In a drag and drop operation, there is a drag source and a drop target. The drag source is the starting location of your dragged data and the drop target is its intended destination. The dragged data is made up of one or more drag items, each of which contains information specific to their original item within the drag source.

A drag item contains several pieces of information: the type of the data, the item's kind, and the actual data itself. The type of a drag item can be one of the common mime types or a custom type specific to your application. Multiple types can be attached to a single drag item so that the item's data can be provided in different formats for interoperability with various drop targets. For example, an image could be represented by an image/jpeg type and thus be recognized as a JPEG by a file upload drop target but also have a plain/text type that allows the image's file name to be communicated to a text input drop target. In addition, there are two kinds of items: string items include inline data in the form of a Unicode string, and file items include a reference to a file from the user's computer.

There are several drop operations that can be performed in a drag and drop operation: "move", "copy", "link", and "cancel". A "move" operation indicates that the dragged data will be moved from its source location to the target location. A "copy" operation indicates that the dragged data will be copied to the target destination. A "link" operation indicates that there will be a relationship established between the source and target locations. Finally, a "cancel" operation indicates that the drag and drop operation will be canceled, resulting in no changes made to the source or target. The drag source can specify what drop operations are allowed for its data, allowing the drop target to decide what operation to perform, using the restrictions set by the drag source as a guideline.

The "root", "on", and "between" drop positions.

Collection components, such as ListView and TableView, support multiple drop positions. The component may support a "root" drop position, allowing items to be dropped on the collection as a whole. It may also support "on" drop positions, such as when dropping into a folder in a list. If the collection allows reordering of its items, it could support "between" drop positions, allowing the user to insert or move items between other items. Any number of these drop positions can be allowed at the same time and the component can use the types of the dragged items to selectively allow or disallow certain positions.

Interaction modes#

There are several interaction modes that need to be considered for drag and drop. When using a mouse, you can click an item and drag by holding the mouse button down and moving the pointer. A drop can be performed by releasing the mouse button or canceled by the Esc key. A similar interaction can be performed via touch, with a drag initiated via a long press and a drop performed by removing your finger from the screen. In both cases, selecting and dragging an item is often accompanied by a drag preview. The drag preview is a smaller version of the dragged item that follows the cursor or touch point. When multiple items are dragged at once, the drag preview displays a stack of items instead, accompanied by a badge reflecting the total number of dragged items. Drop targets are visually highlighted when dragged over, and the desired drop operation can be controlled via modifier key presses or drop activations via hovering over the drop target for a period of time.

A custom drag preview representing multiple drag items.

For keyboards, copy and paste shortcuts have traditionally been the alternative method to drag and drop. This comes with many limitations as it is often hard to know where pasting is allowed and difficult to control the exact positioning of the pasted items. Touch screen readers are even more limited in their ability to perform these operations since they often lack access to a keyboard and thus cannot copy paste in the same manner.

React Spectrum attempts to resolve the above limitations by providing interactive drag affordances that bring a user into drag and drop mode when triggered via keyboard or screen reader virtual click. To perform a drag and drop operation via a keyboard, first select the items to be dragged by focusing the row and pressing Space. You can then start the drag operation by moving focus to the drag handle on any of the selected rows via the arrow keys and hitting Enter or Space. Once a drag operation is started, you will be automatically brought to the first valid drop target. Tab can then be used to cycle through other valid drop targets. For collection components like the ListView above, Tab will move you on or off the overall component itself whereas ArrowUp and ArrowDown will cycle through the valid drop targets within the component itself. Hitting Enter will then confirm the drop operation on the focused drop target. To cancel a drag operation, you can hit Esc at any time.

A focusable drag affordance to initiate keyboard and screen reader drag and drop.

For screen readers, please follow the custom instructions announced when focusing the row's drag handle to begin a drag operation. For screen readers on mobile devices, swiping left and right will move you between valid drop targets and double tapping will confirm a drop operation. Go ahead and try out drag and drop in the example below!

Examples#

Creating the draggable list#

For the first ListView in the example above, we want to make the rows draggable and have the dragged rows removed from the list upon a successful drop. To accomplish this, we first want to set up the initial list of items for our draggable ListView via useListData so that we have access to some helper methods to modify the list of items on the fly. Note that this is completely optional and is not required to enable drag and drop in React Spectrum. You may substitute useListData with useAsyncList or with any other state management solution.

let list = useListData({
  initialItems: [
    {id: 'a', type: 'file', name: 'Adobe Photoshop'},
    {id: 'b', type: 'file', name: 'Adobe XD'},
    {id: 'c', type: 'file', name: 'Adobe Dreamweaver'},
    {id: 'd', type: 'file', name: 'Adobe InDesign'},
    {id: 'e', type: 'file', name: 'Adobe Connect'}
  ]
});

let list = useListData({
  initialItems: [
    {id: 'a', type: 'file', name: 'Adobe Photoshop'},
    {id: 'b', type: 'file', name: 'Adobe XD'},
    {id: 'c', type: 'file', name: 'Adobe Dreamweaver'},
    {id: 'd', type: 'file', name: 'Adobe InDesign'},
    {id: 'e', type: 'file', name: 'Adobe Connect'}
  ]
});

let list = useListData({
  initialItems: [
    {
      id: 'a',
      type: 'file',
      name:
        'Adobe Photoshop'
    },
    {
      id: 'b',
      type: 'file',
      name: 'Adobe XD'
    },
    {
      id: 'c',
      type: 'file',
      name:
        'Adobe Dreamweaver'
    },
    {
      id: 'd',
      type: 'file',
      name:
        'Adobe InDesign'
    },
    {
      id: 'e',
      type: 'file',
      name:
        'Adobe Connect'
    }
  ]
});

Next, we need to specify the data associated with each dragged item by returning an array from the getItems function. As described above in the concepts section, each item includes a mapping of drag types to serialized data. In this case, we look up the information for each dragged item and serialize it, mapping it to a custom item type. This information will be processed and provided to the drop target's drop handlers on drop.

let getItems = (keys) => [...keys].map(key => {
  let item = list.getItem(key);
  return {
    'adobe-app': JSON.stringify(item)
  };
})

let getItems = (keys) => [...keys].map(key => {
  let item = list.getItem(key);
  return {
    'adobe-app': JSON.stringify(item)
  };
})

let getItems = (keys) =>
  [...keys].map(
    (key) => {
      let item = list
        .getItem(key);
      return {
        'adobe-app': JSON
          .stringify(
            item
          )
      };
    }
  );

We also create an onDragEnd event handler for useDragAndDrop that handles removing the dragged items from the draggable list upon a successful drop operation. Note how we use the .remove method provided by useListData to remove the dropped items from our list.

let onDragEnd = (e) => {
  if (e.dropOperation === 'move') {
    list.remove(...e.keys);
  }
}

let onDragEnd = (e) => {
  if (e.dropOperation === 'move') {
    list.remove(...e.keys);
  }
}

let onDragEnd = (e) => {
  if (
    e.dropOperation ===
      'move'
  ) {
    list.remove(
      ...e.keys
    );
  }
};

Finally, we provide our getItems and onDragEnd functions as options to useDragAndDrop, providing us with a set of dragAndDropHooks that we can pass to our ListView directly. Below is what our draggable ListView would look like after combining everything together. For more info on getItems and onDragEnd, see the props section below and the React Aria docs.

import {useDragAndDrop} from '@adobe/react-spectrum';
import {Item, ListView, useListData} from '@adobe/react-spectrum';

function DraggableList() {
  let list = useListData({
    initialItems: [
      { id: 'a', type: 'file', name: 'Adobe Photoshop' },
      { id: 'b', type: 'file', name: 'Adobe XD' },
      { id: 'c', type: 'file', name: 'Adobe Dreamweaver' },
      { id: 'd', type: 'file', name: 'Adobe InDesign' },
      { id: 'e', type: 'file', name: 'Adobe Connect' }
    ]
  });

  let { dragAndDropHooks } = useDragAndDrop({
    getItems: (keys) =>
      [...keys].map((key) => {
        let item = list.getItem(key);
        return {
          'adobe-app': JSON.stringify(item)
        };
      }),
    onDragEnd: (e) => {
      if (e.dropOperation === 'move') {
        list.remove(...e.keys);
      }
    }
  });

  return (
    <ListView
      aria-label="Draggable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item textValue={item.name}>
          {item.name}
        </Item>
      )}
    </ListView>
  );
}

import {useDragAndDrop} from '@adobe/react-spectrum';
import {
  Item,
  ListView,
  useListData
} from '@adobe/react-spectrum';

function DraggableList() {
  let list = useListData({
    initialItems: [
      { id: 'a', type: 'file', name: 'Adobe Photoshop' },
      { id: 'b', type: 'file', name: 'Adobe XD' },
      { id: 'c', type: 'file', name: 'Adobe Dreamweaver' },
      { id: 'd', type: 'file', name: 'Adobe InDesign' },
      { id: 'e', type: 'file', name: 'Adobe Connect' }
    ]
  });

  let { dragAndDropHooks } = useDragAndDrop({
    getItems: (keys) =>
      [...keys].map((key) => {
        let item = list.getItem(key);
        return {
          'adobe-app': JSON.stringify(item)
        };
      }),
    onDragEnd: (e) => {
      if (e.dropOperation === 'move') {
        list.remove(...e.keys);
      }
    }
  });

  return (
    <ListView
      aria-label="Draggable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item textValue={item.name}>
          {item.name}
        </Item>
      )}
    </ListView>
  );
}

import {useDragAndDrop} from '@adobe/react-spectrum';
import {
  Item,
  ListView,
  useListData
} from '@adobe/react-spectrum';

function DraggableList() {
  let list = useListData(
    {
      initialItems: [
        {
          id: 'a',
          type: 'file',
          name:
            'Adobe Photoshop'
        },
        {
          id: 'b',
          type: 'file',
          name:
            'Adobe XD'
        },
        {
          id: 'c',
          type: 'file',
          name:
            'Adobe Dreamweaver'
        },
        {
          id: 'd',
          type: 'file',
          name:
            'Adobe InDesign'
        },
        {
          id: 'e',
          type: 'file',
          name:
            'Adobe Connect'
        }
      ]
    }
  );

  let {
    dragAndDropHooks
  } = useDragAndDrop({
    getItems: (keys) =>
      [...keys].map(
        (key) => {
          let item = list
            .getItem(
              key
            );
          return {
            'adobe-app':
              JSON
                .stringify(
                  item
                )
          };
        }
      ),
    onDragEnd: (e) => {
      if (
        e.dropOperation ===
          'move'
      ) {
        list.remove(
          ...e.keys
        );
      }
    }
  });

  return (
    <ListView
      aria-label="Draggable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item
          textValue={item
            .name}
        >
          {item.name}
        </Item>
      )}
    </ListView>
  );
}

Creating the droppable list#

We want to make the second ListView droppable, accepting drops between items and onto folders but not at the root of the list. Similar to the draggable ListView, we'll start by initializing the default item list via useListData. As a reminder, useListData is completely optional here and can be replaced by useAsyncList or any other state management solution.

let list = useListData({
  initialItems: [
    {id: 'f', type: 'file', name: 'Adobe AfterEffects'},
    {id: 'g', type: 'file', name: 'Adobe Illustrator'},
    {id: 'h', type: 'file', name: 'Adobe Lightroom'},
    {id: 'i', type: 'file', name: 'Adobe Premiere Pro'},
    {id: 'j', type: 'file', name: 'Adobe Fresco'},
    {id: 'k', type: 'folder', name: 'Apps', childNodes: []}
  ]
});

let list = useListData({
  initialItems: [
    {id: 'f', type: 'file', name: 'Adobe AfterEffects'},
    {id: 'g', type: 'file', name: 'Adobe Illustrator'},
    {id: 'h', type: 'file', name: 'Adobe Lightroom'},
    {id: 'i', type: 'file', name: 'Adobe Premiere Pro'},
    {id: 'j', type: 'file', name: 'Adobe Fresco'},
    {id: 'k', type: 'folder', name: 'Apps', childNodes: []}
  ]
});

let list = useListData({
  initialItems: [
    {
      id: 'f',
      type: 'file',
      name:
        'Adobe AfterEffects'
    },
    {
      id: 'g',
      type: 'file',
      name:
        'Adobe Illustrator'
    },
    {
      id: 'h',
      type: 'file',
      name:
        'Adobe Lightroom'
    },
    {
      id: 'i',
      type: 'file',
      name:
        'Adobe Premiere Pro'
    },
    {
      id: 'j',
      type: 'file',
      name:
        'Adobe Fresco'
    },
    {
      id: 'k',
      type: 'folder',
      name: 'Apps',
      childNodes: []
    }
  ]
});

Since we only want to accept items from the first ListView, we set up an array containing our custom type that will be provided to useDragAndDrop's acceptedDragTypes option.

let acceptedDragTypes = ['adobe-app'];

let acceptedDragTypes = ['adobe-app'];

let acceptedDragTypes = [
  'adobe-app'
];

Next, we add support for insertion drops by providing an onInsert handler. This handler uses the relative drop position to insert the dropped items before or after the target item. Note how we can access each drop item's information by using the expected drag type and getText.

let onInsert = async (e) => {
  let {
    items,
    target
  } = e;

  let processedItems = await Promise.all(
    items.map(async item => JSON.parse(await item.getText('adobe-app')))
  );

  if (target.dropPosition === 'before') {
    list.insertBefore(target.key, ...processedItems);
  } else if (target.dropPosition === 'after') {
    list.insertAfter(target.key, ...processedItems);
  }
}

let onInsert = async (e) => {
  let {
    items,
    target
  } = e;

  let processedItems = await Promise.all(
    items.map(async (item) =>
      JSON.parse(await item.getText('adobe-app'))
    )
  );

  if (target.dropPosition === 'before') {
    list.insertBefore(target.key, ...processedItems);
  } else if (target.dropPosition === 'after') {
    list.insertAfter(target.key, ...processedItems);
  }
};

let onInsert = async (
  e
) => {
  let {
    items,
    target
  } = e;

  let processedItems =
    await Promise.all(
      items.map(
        async (item) =>
          JSON.parse(
            await item
              .getText(
                'adobe-app'
              )
          )
      )
    );

  if (
    target
      .dropPosition ===
      'before'
  ) {
    list.insertBefore(
      target.key,
      ...processedItems
    );
  } else if (
    target
      .dropPosition ===
      'after'
  ) {
    list.insertAfter(
      target.key,
      ...processedItems
    );
  }
};

Similarly, item drops are enabled by providing an onItemDrop handler. The folder's contents are updated by using list.update to add the dropped items to the folder's childNodes. To ensure that we can only drop on the folder in the droppable list, we create a shouldAcceptItemDrop function that only returns true if the drop target has childNodes.

let onItemDrop = async (e) => {
  let {
    items,
    target
  } = e;
  let processedItems = await Promise.all(
    items.map(async (item) => JSON.parse(await item.getText('adobe-app')))
  );
  let targetItem = list.getItem(target.key);
  list.update(target.key, {
    ...targetItem,
    childNodes: [...targetItem.childNodes, ...processedItems]
  });
};

let shouldAcceptItemDrop = (target) => !!list.getItem(target.key).childNodes;

let onItemDrop = async (e) => {
  let {
    items,
    target
  } = e;
  let processedItems = await Promise.all(
    items.map(async (item) =>
      JSON.parse(await item.getText('adobe-app'))
    )
  );
  let targetItem = list.getItem(target.key);
  list.update(target.key, {
    ...targetItem,
    childNodes: [
      ...targetItem.childNodes,
      ...processedItems
    ]
  });
};

let shouldAcceptItemDrop = (target) =>
  !!list.getItem(target.key).childNodes;

let onItemDrop = async (
  e
) => {
  let {
    items,
    target
  } = e;
  let processedItems =
    await Promise.all(
      items.map(
        async (item) =>
          JSON.parse(
            await item
              .getText(
                'adobe-app'
              )
          )
      )
    );
  let targetItem = list
    .getItem(target.key);
  list.update(
    target.key,
    {
      ...targetItem,
      childNodes: [
        ...targetItem
          .childNodes,
        ...processedItems
      ]
    }
  );
};

let shouldAcceptItemDrop =
  (target) =>
    !!list.getItem(
      target.key
    ).childNodes;

Below is what our droppable ListView would look like after combining everything together. By not supplying an onRootDrop handler to useDragAndDrop, we automatically exclude the root of the droppable list from the drop targets reachable via any of the drag and drop interaction modes. For more information on the options used above, please see the API section below.

import type {TextDropItem} from '@adobe/react-spectrum';
import {Text, useDragAndDrop} from '@adobe/react-spectrum';
import Folder from '@spectrum-icons/illustrations/Folder';

function DroppableList() {
  let list = useListData({
    initialItems: [
      { id: 'f', type: 'file', name: 'Adobe AfterEffects' },
      { id: 'g', type: 'file', name: 'Adobe Illustrator' },
      { id: 'h', type: 'file', name: 'Adobe Lightroom' },
      { id: 'i', type: 'file', name: 'Adobe Premiere Pro' },
      { id: 'j', type: 'file', name: 'Adobe Fresco' },
      { id: 'k', type: 'folder', name: 'Apps', childNodes: [] }
    ]
  });

  let { dragAndDropHooks } = useDragAndDrop({
    acceptedDragTypes: ['adobe-app'],
    shouldAcceptItemDrop: (target) => !!list.getItem(target.key).childNodes,
    onInsert: async (e) => {
      let {
        items,
        target
      } = e;
      let processedItems = await Promise.all(
        items.map(async (item: TextDropItem) =>
          JSON.parse(await item.getText('adobe-app'))
        )
      );

      if (target.dropPosition === 'before') {
        list.insertBefore(target.key, ...processedItems);
      } else if (target.dropPosition === 'after') {
        list.insertAfter(target.key, ...processedItems);
      }
    },
    onItemDrop: async (e) => {
      let {
        items,
        target
      } = e;
      let processedItems = await Promise.all(
        items.map(async (item: TextDropItem) =>
          JSON.parse(await item.getText('adobe-app'))
        )
      );
      let targetItem = list.getItem(target.key);
      list.update(target.key, {
        ...targetItem,
        childNodes: [...targetItem.childNodes, ...processedItems]
      });
    }
  });

  return (
    <ListView
      aria-label="Droppable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item textValue={item.name} hasChildItems={item.type === 'folder'}>
          {item.type === 'folder' && <Folder />}
          <Text>{item.name}</Text>
          {item.type === 'folder' &&
            (
              <Text slot="description">
                {`contains ${item.childNodes.length} dropped item(s)`}
              </Text>
            )}
        </Item>
      )}
    </ListView>
  );
}

import type {TextDropItem} from '@adobe/react-spectrum';
import {Text, useDragAndDrop} from '@adobe/react-spectrum';
import Folder from '@spectrum-icons/illustrations/Folder';

function DroppableList() {
  let list = useListData({
    initialItems: [
      { id: 'f', type: 'file', name: 'Adobe AfterEffects' },
      { id: 'g', type: 'file', name: 'Adobe Illustrator' },
      { id: 'h', type: 'file', name: 'Adobe Lightroom' },
      { id: 'i', type: 'file', name: 'Adobe Premiere Pro' },
      { id: 'j', type: 'file', name: 'Adobe Fresco' },
      {
        id: 'k',
        type: 'folder',
        name: 'Apps',
        childNodes: []
      }
    ]
  });

  let { dragAndDropHooks } = useDragAndDrop({
    acceptedDragTypes: ['adobe-app'],
    shouldAcceptItemDrop: (target) =>
      !!list.getItem(target.key).childNodes,
    onInsert: async (e) => {
      let {
        items,
        target
      } = e;
      let processedItems = await Promise.all(
        items.map(async (item: TextDropItem) =>
          JSON.parse(await item.getText('adobe-app'))
        )
      );

      if (target.dropPosition === 'before') {
        list.insertBefore(target.key, ...processedItems);
      } else if (target.dropPosition === 'after') {
        list.insertAfter(target.key, ...processedItems);
      }
    },
    onItemDrop: async (e) => {
      let {
        items,
        target
      } = e;
      let processedItems = await Promise.all(
        items.map(async (item: TextDropItem) =>
          JSON.parse(await item.getText('adobe-app'))
        )
      );
      let targetItem = list.getItem(target.key);
      list.update(target.key, {
        ...targetItem,
        childNodes: [
          ...targetItem.childNodes,
          ...processedItems
        ]
      });
    }
  });

  return (
    <ListView
      aria-label="Droppable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item
          textValue={item.name}
          hasChildItems={item.type === 'folder'}
        >
          {item.type === 'folder' && <Folder />}
          <Text>{item.name}</Text>
          {item.type === 'folder' &&
            (
              <Text slot="description">
                {`contains ${item.childNodes.length} dropped item(s)`}
              </Text>
            )}
        </Item>
      )}
    </ListView>
  );
}

import type {TextDropItem} from '@adobe/react-spectrum';
import {
  Text,
  useDragAndDrop
} from '@adobe/react-spectrum';
import Folder from '@spectrum-icons/illustrations/Folder';

function DroppableList() {
  let list = useListData(
    {
      initialItems: [
        {
          id: 'f',
          type: 'file',
          name:
            'Adobe AfterEffects'
        },
        {
          id: 'g',
          type: 'file',
          name:
            'Adobe Illustrator'
        },
        {
          id: 'h',
          type: 'file',
          name:
            'Adobe Lightroom'
        },
        {
          id: 'i',
          type: 'file',
          name:
            'Adobe Premiere Pro'
        },
        {
          id: 'j',
          type: 'file',
          name:
            'Adobe Fresco'
        },
        {
          id: 'k',
          type: 'folder',
          name: 'Apps',
          childNodes: []
        }
      ]
    }
  );

  let {
    dragAndDropHooks
  } = useDragAndDrop({
    acceptedDragTypes: [
      'adobe-app'
    ],
    shouldAcceptItemDrop:
      (target) =>
        !!list.getItem(
          target.key
        ).childNodes,
    onInsert: async (
      e
    ) => {
      let {
        items,
        target
      } = e;
      let processedItems =
        await Promise
          .all(
            items.map(
              async (
                item:
                  TextDropItem
              ) =>
                JSON
                  .parse(
                    await item
                      .getText(
                        'adobe-app'
                      )
                  )
            )
          );

      if (
        target
          .dropPosition ===
          'before'
      ) {
        list
          .insertBefore(
            target.key,
            ...processedItems
          );
      } else if (
        target
          .dropPosition ===
          'after'
      ) {
        list.insertAfter(
          target.key,
          ...processedItems
        );
      }
    },
    onItemDrop: async (
      e
    ) => {
      let {
        items,
        target
      } = e;
      let processedItems =
        await Promise
          .all(
            items.map(
              async (
                item:
                  TextDropItem
              ) =>
                JSON
                  .parse(
                    await item
                      .getText(
                        'adobe-app'
                      )
                  )
            )
          );
      let targetItem =
        list.getItem(
          target.key
        );
      list.update(
        target.key,
        {
          ...targetItem,
          childNodes: [
            ...targetItem
              .childNodes,
            ...processedItems
          ]
        }
      );
    }
  });

  return (
    <ListView
      aria-label="Droppable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item
          textValue={item
            .name}
          hasChildItems={item
            .type ===
            'folder'}
        >
          {item.type ===
              'folder' &&
            <Folder />}
          <Text>
            {item.name}
          </Text>
          {item.type ===
              'folder' &&
            (
              <Text slot="description">
                {`contains ${item.childNodes.length} dropped item(s)`}
              </Text>
            )}
        </Item>
      )}
    </ListView>
  );
}

Low-level API#

The above example makes use of several high-level events and options supported by useDragAndDrop to define the droppable ListView's behavior. However, you may have complex operations that would be difficult or impossible to implement using the high-level options alone. For situations like this, you can use getDropOperation and onDrop instead, granting you complete control over what drop operations should be returned and how any drop on your collection should be handled. For a more general explanation of these low-level options and how they work, see the API section below and the useDroppableCollection React Aria docs.

The ListView below allows external directories to be dropped at its root level or between existing items. Files of a specific type can be dropped on certain pre-existing directories only.

import type {DirectoryDropItem, FileDropItem} from '@adobe/react-spectrum';
import {DIRECTORY_DRAG_TYPE} from '@adobe/react-spectrum';

function DroppableListLowLevelAPI() {
  let list = useListData({
    initialItems: [
      {
        id: 1,
        name: 'Images',
        contains: 0,
        accept: ['image/png', 'image/jpeg']
      },
      { id: 2, name: 'Videos', contains: 0, accept: ['video/mp4'] },
      {
        id: 3,
        name: 'Documents',
        contains: 0,
        accept: ['text/plain', 'application/pdf']
      }
    ]
  });

  let { dragAndDropHooks } = useDragAndDrop({
    onDrop: async (e) => {
      let items = await Promise.all(
        e.items
          .filter((item) => {
            // Check if dropped item is accepted.
            if (
              item.kind === 'file' && e.target.type === 'item' &&
              e.target.dropPosition === 'on'
            ) {
              let folder = list.getItem(e.target.key);
              return folder.accept.includes(item.type);
            }

            return item.kind === 'directory';
          })
          .map(async (item: FileDropItem | DirectoryDropItem) => {
            // Collect child count from dropped directories.
            let contains = 0;
            let accept;
            if (item.kind === 'directory') {
              for await (let _ of item.getEntries()) {
                contains++;
                accept = [];
              }
            }

            return {
              id: Math.random(),
              name: item.name,
              contains,
              accept
            };
          })
      );

      // Update item count if dropping on an item, otherwise insert the new items in the list.
      if (e.target.type === 'item') {
        if (e.target.dropPosition === 'on') {
          let item = list.getItem(e.target.key);
          list.update(e.target.key, {
            ...item,
            contains: item.contains + items.length
          });
        } else if (e.target.dropPosition === 'before') {
          list.insertBefore(e.target.key, ...items);
        } else if (e.target.dropPosition === 'after') {
          list.insertAfter(e.target.key, ...items);
        }
      } else {
        // If dropping on the root, append the directory to the bottom of the list
        list.append(...items);
      }
    },
    getDropOperation: (target, types, allowedOperations) => {
      // When dropping on an item, check whether the item accepts the drag types and cancel if not.
      if (target.type === 'item' && target.dropPosition === 'on') {
        let item = list.getItem(target.key);
        return item.accept && item.accept.some((type) => types.has(type))
          ? allowedOperations[0]
          : 'cancel';
      }

      // If dropping a directory between items, support a copy operation.
      return types.has(DIRECTORY_DRAG_TYPE) ? 'copy' : 'cancel';
    }
  });

  return (
    <ListView
      aria-label="Low-level api droppable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item textValue={item.name} hasChildItems>
          <Folder />
          <Text>{item.name}</Text>
          <Text slot="description">{`contains ${item.contains} item(s)`}</Text>
        </Item>
      )}
    </ListView>
  );
}

import type {
  DirectoryDropItem,
  FileDropItem
} from '@adobe/react-spectrum';
import {DIRECTORY_DRAG_TYPE} from '@adobe/react-spectrum';

function DroppableListLowLevelAPI() {
  let list = useListData({
    initialItems: [
      {
        id: 1,
        name: 'Images',
        contains: 0,
        accept: ['image/png', 'image/jpeg']
      },
      {
        id: 2,
        name: 'Videos',
        contains: 0,
        accept: ['video/mp4']
      },
      {
        id: 3,
        name: 'Documents',
        contains: 0,
        accept: ['text/plain', 'application/pdf']
      }
    ]
  });

  let { dragAndDropHooks } = useDragAndDrop({
    onDrop: async (e) => {
      let items = await Promise.all(
        e.items
          .filter((item) => {
            // Check if dropped item is accepted.
            if (
              item.kind === 'file' &&
              e.target.type === 'item' &&
              e.target.dropPosition === 'on'
            ) {
              let folder = list.getItem(e.target.key);
              return folder.accept.includes(item.type);
            }

            return item.kind === 'directory';
          })
          .map(
            async (
              item: FileDropItem | DirectoryDropItem
            ) => {
              // Collect child count from dropped directories.
              let contains = 0;
              let accept;
              if (item.kind === 'directory') {
                for await (let _ of item.getEntries()) {
                  contains++;
                  accept = [];
                }
              }

              return {
                id: Math.random(),
                name: item.name,
                contains,
                accept
              };
            }
          )
      );

      // Update item count if dropping on an item, otherwise insert the new items in the list.
      if (e.target.type === 'item') {
        if (e.target.dropPosition === 'on') {
          let item = list.getItem(e.target.key);
          list.update(e.target.key, {
            ...item,
            contains: item.contains + items.length
          });
        } else if (e.target.dropPosition === 'before') {
          list.insertBefore(e.target.key, ...items);
        } else if (e.target.dropPosition === 'after') {
          list.insertAfter(e.target.key, ...items);
        }
      } else {
        // If dropping on the root, append the directory to the bottom of the list
        list.append(...items);
      }
    },
    getDropOperation: (
      target,
      types,
      allowedOperations
    ) => {
      // When dropping on an item, check whether the item accepts the drag types and cancel if not.
      if (
        target.type === 'item' &&
        target.dropPosition === 'on'
      ) {
        let item = list.getItem(target.key);
        return item.accept &&
            item.accept.some((type) => types.has(type))
          ? allowedOperations[0]
          : 'cancel';
      }

      // If dropping a directory between items, support a copy operation.
      return types.has(DIRECTORY_DRAG_TYPE)
        ? 'copy'
        : 'cancel';
    }
  });

  return (
    <ListView
      aria-label="Low-level api droppable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item textValue={item.name} hasChildItems>
          <Folder />
          <Text>{item.name}</Text>
          <Text slot="description">
            {`contains ${item.contains} item(s)`}
          </Text>
        </Item>
      )}
    </ListView>
  );
}

import type {
  DirectoryDropItem,
  FileDropItem
} from '@adobe/react-spectrum';
import {DIRECTORY_DRAG_TYPE} from '@adobe/react-spectrum';

function DroppableListLowLevelAPI() {
  let list = useListData(
    {
      initialItems: [
        {
          id: 1,
          name: 'Images',
          contains: 0,
          accept: [
            'image/png',
            'image/jpeg'
          ]
        },
        {
          id: 2,
          name: 'Videos',
          contains: 0,
          accept: [
            'video/mp4'
          ]
        },
        {
          id: 3,
          name:
            'Documents',
          contains: 0,
          accept: [
            'text/plain',
            'application/pdf'
          ]
        }
      ]
    }
  );

  let {
    dragAndDropHooks
  } = useDragAndDrop({
    onDrop: async (
      e
    ) => {
      let items =
        await Promise
          .all(
            e.items
              .filter(
                (
                  item
                ) => {
                  // Check if dropped item is accepted.
                  if (
                    item
                        .kind ===
                      'file' &&
                    e.target
                        .type ===
                      'item' &&
                    e.target
                        .dropPosition ===
                      'on'
                  ) {
                    let folder =
                      list
                        .getItem(
                          e.target
                            .key
                        );
                    return folder
                      .accept
                      .includes(
                        item
                          .type
                      );
                  }

                  return item
                    .kind ===
                    'directory';
                }
              )
              .map(
                async (
                  item:
                    | FileDropItem
                    | DirectoryDropItem
                ) => {
                  // Collect child count from dropped directories.
                  let contains =
                    0;
                  let accept;
                  if (
                    item
                      .kind ===
                      'directory'
                  ) {
                    for await (
                      let _
                        of item
                          .getEntries()
                    ) {
                      contains++;
                      accept =
                        [];
                    }
                  }

                  return {
                    id:
                      Math
                        .random(),
                    name:
                      item
                        .name,
                    contains,
                    accept
                  };
                }
              )
          );

      // Update item count if dropping on an item, otherwise insert the new items in the list.
      if (
        e.target.type ===
          'item'
      ) {
        if (
          e.target
            .dropPosition ===
            'on'
        ) {
          let item = list
            .getItem(
              e.target
                .key
            );
          list.update(
            e.target.key,
            {
              ...item,
              contains:
                item
                  .contains +
                items
                  .length
            }
          );
        } else if (
          e.target
            .dropPosition ===
            'before'
        ) {
          list
            .insertBefore(
              e.target
                .key,
              ...items
            );
        } else if (
          e.target
            .dropPosition ===
            'after'
        ) {
          list
            .insertAfter(
              e.target
                .key,
              ...items
            );
        }
      } else {
        // If dropping on the root, append the directory to the bottom of the list
        list.append(
          ...items
        );
      }
    },
    getDropOperation: (
      target,
      types,
      allowedOperations
    ) => {
      // When dropping on an item, check whether the item accepts the drag types and cancel if not.
      if (
        target.type ===
          'item' &&
        target
            .dropPosition ===
          'on'
      ) {
        let item = list
          .getItem(
            target.key
          );
        return item
            .accept &&
            item.accept
              .some((
                type
              ) =>
                types
                  .has(
                    type
                  )
              )
          ? allowedOperations[
            0
          ]
          : 'cancel';
      }

      // If dropping a directory between items, support a copy operation.
      return types.has(
          DIRECTORY_DRAG_TYPE
        )
        ? 'copy'
        : 'cancel';
    }
  });

  return (
    <ListView
      aria-label="Low-level api droppable list view example"
      width="size-3600"
      height="size-3600"
      selectionMode="multiple"
      items={list.items}
      dragAndDropHooks={dragAndDropHooks}
    >
      {(item) => (
        <Item
          textValue={item
            .name}
          hasChildItems
        >
          <Folder />
          <Text>
            {item.name}
          </Text>
          <Text slot="description">
            {`contains ${item.contains} item(s)`}
          </Text>
        </Item>
      )}
    </ListView>
  );
}

API#

As seen in the examples above, enabling drag and drop for a supported React Spectrum component differs slightly from the typical event handler prop pattern that you may be familiar with. Instead of providing each event handler directly to the component, you must first import useDragAndDrop from the @react-spectrum/dnd package and provide this hook with your desired options. useDragAndDrop then provides you with a set of hooks that you can pass to the component via its dragAndDropHooks prop, thus enabling drag and drop operations for the component. This approach allows the drag and drop implementation to be included only when used, keeping bundle sizes small when unused by an application.

Whether the component supports drag operations, drop operations, or both all depends on the options you provide to the useDragAndDrop. If you omit the getItems option, the component will not be draggable. Alternatively, if you don't provide an onDrop handler or any of the high-level drop handlers (onInsert/onItemDrop/onReorder/onRootDrop) to useDragAndDrop then the component will not be droppable.

High-level drop handlers and options#

Name	Type	Default	Description
`acceptedDragTypes`	`'all' \| Array<string \| symbol>`	`'all'`	The drag types that the droppable collection accepts. If the collection accepts directories, include `DIRECTORY_DRAG_TYPE` in your array of allowed types.
`onInsert`	`( (e: DroppableCollectionInsertDropEvent )) => void`	—	Handler that is called when external items are dropped "between" items.
`onRootDrop`	`( (e: DroppableCollectionRootDropEvent )) => void`	—	Handler that is called when external items are dropped on the droppable collection's root.
`onItemDrop`	`( (e: DroppableCollectionOnItemDropEvent )) => void`	—	Handler that is called when items are dropped "on" an item.
`onReorder`	`( (e: DroppableCollectionReorderEvent )) => void`	—	Handler that is called when items are reordered via drag in the source collection.
`shouldAcceptItemDrop`	`( (target: ItemDropTarget, , types: DragTypes )) => boolean`	—	A function returning whether a given target in the droppable collection is a valid "on" drop target for the current drag types.

As demonstrated in this example, useDragAndDrop accepts a set of high-level drop handlers and options. Providing any of these high-level drop handlers will enable the corresponding drop behavior in your component (e.g. if you provide onReorder, internal insertion drop operations are enabled, provided the component is draggable as well). acceptedDragTypes allows you to control what types of drag items your droppable component should accept and shouldAcceptItemDrop gives you a greater degree of control over whether an item in your component is a valid drop target. Providing these two options will also automatically filter out any invalid drag items from the list of items provided to the drop handlers.

Low-level drop handlers and options#

Name	Type	Description
`onDropEnter`	`( (e: DroppableCollectionEnterEvent )) => void`	Handler that is called when a valid drag enters a drop target.
`onDropExit`	`( (e: DroppableCollectionExitEvent )) => void`	Handler that is called when a valid drag exits a drop target.
`onDrop`	`( (e: DroppableCollectionDropEvent )) => void`	Handler that is called when a valid drag is dropped on a drop target. When defined, this overrides other drop handlers such as `onInsert`, and `onItemDrop`.
`getDropOperation`	`( target: DropTarget, types: DragTypes, allowedOperations: DropOperation[] ) => DropOperation`	A function returning the drop operation to be performed when items matching the given types are dropped on the drop target.

These lower level drop handlers and options can be used to supplement or replace the high-level options mentioned above. getDropOperation allows you to allows you to specify what drop operations is returned based on the dragged items' drag types, the drop target information, and drop operations allowed by the drag source. It can be used in tandem with the higher level acceptedDragTypes and shouldAcceptItemDrop (when onItemDrop is provided) options. Those two options serve as a pre-filter, preemptively canceling any attempted drop operation that doesn't pass their requirements.

onDrop can be used to handle all accepted drops, overriding any provided high-level drop handlers. On the other hand, onDropEnter and onDropExit can be freely used with any of the high-level drop handlers and options.

Props#

The full list of options for useDragAndDrop is available below.

useDragAndDrop(
  (options: DragAndDropOptions
)): DragAndDropHooks

Name	Type	Default	Description
`getItems`	`( (keys: Set<Key> )) => DragItem[]`	`() => []`	A function that returns the items being dragged. If not specified, we assume that the collection is not draggable.
`renderPreview`	`( (keys: Set<Key>, , draggedKey: Key )) => JSX.Element`	—	Provide a custom drag preview. `draggedKey` represents the key of the item the user actually dragged.
`onDragStart`	`( (e: DraggableCollectionStartEvent )) => void`	—	Handler that is called when a drag operation is started.
`onDragMove`	`( (e: DraggableCollectionMoveEvent )) => void`	—	Handler that is called when the drag is moved.
`onDragEnd`	`( (e: DraggableCollectionEndEvent )) => void`	—	Handler that is called when the drag operation is ended, either as a result of a drop or a cancellation.
`getAllowedDropOperations`	`() => DropOperation[]`	—	Function that returns the drop operations that are allowed for the dragged items. If not provided, all drop operations are allowed.
`acceptedDragTypes`	`'all' \| Array<string \| symbol>`	`'all'`	The drag types that the droppable collection accepts. If the collection accepts directories, include `DIRECTORY_DRAG_TYPE` in your array of allowed types.
`onInsert`	`( (e: DroppableCollectionInsertDropEvent )) => void`	—	Handler that is called when external items are dropped "between" items.
`onRootDrop`	`( (e: DroppableCollectionRootDropEvent )) => void`	—	Handler that is called when external items are dropped on the droppable collection's root.
`onItemDrop`	`( (e: DroppableCollectionOnItemDropEvent )) => void`	—	Handler that is called when items are dropped "on" an item.
`onReorder`	`( (e: DroppableCollectionReorderEvent )) => void`	—	Handler that is called when items are reordered via drag in the source collection.
`shouldAcceptItemDrop`	`( (target: ItemDropTarget, , types: DragTypes )) => boolean`	—	A function returning whether a given target in the droppable collection is a valid "on" drop target for the current drag types.
`onDropEnter`	`( (e: DroppableCollectionEnterEvent )) => void`	—	Handler that is called when a valid drag enters a drop target.
`onDropExit`	`( (e: DroppableCollectionExitEvent )) => void`	—	Handler that is called when a valid drag exits a drop target.
`onDrop`	`( (e: DroppableCollectionDropEvent )) => void`	—	Handler that is called when a valid drag is dropped on a drop target. When defined, this overrides other drop handlers such as `onInsert`, and `onItemDrop`.
`getDropOperation`	`( target: DropTarget, types: DragTypes, allowedOperations: DropOperation[] ) => DropOperation`	—	A function returning the drop operation to be performed when items matching the given types are dropped on the drop target.

Of the various drag-specific options above, getAllowedDropOperations may be of particular interest. When the dragged items are dropped on a drop target created using the React Aria drag and drop hooks, the allowed drop operations you return in getAllowedDropOperations are provided to the drop target's getDropOperation, giving the drop target extra information to use when deciding what drop operation to execute. This in turn provides the onDragEnd and onDrop handlers with the executed drop operation, allowing you to decide what to do with the dragged items in your original component and in the dropped component.

For instance, you may have a draggable collection of items that allows "move" and "copy" operations but you need a way to know whether or not you should be removing the dragged items from the list after a drop operation. A drop target that only allows "copy" operations, such as a file upload drop zone, would be able to return "copy" from its getDropOperation and communicate that to your draggable collection's onDragEnd handler, letting the draggable collection know that it shouldn't remove the dragged items from its list. Alternatively, a drop target that allows "move" operations, like in the example above, would return move from its getDropOperation and thus inform your draggable collection to remove the dragged items from its list.

Supported components#

The following list shows which components currently support drag and drop. Common drag and drop implementations are included in each component's documentation so definitely take a look!

Name	Type	Description
`items`	`DropItem[]`	The dropped items.
`dropOperation`	`DropOperation`	The drop operation that should occur.
`target`	`ItemDropTarget`	The drop target.

TextDropItem
  | FileDropItem
  | DirectoryDropItem

Properties

Name	Type	Description
`kind`	`'text'`	The item kind.
`types`	`Set<string>`	The drag types available for this item. These are often mime types, but may be custom app-specific types.

Methods

Method	Description
`getText( (type: string )): Promise<string>`	Returns the data for the given type as a string.

Properties

Name	Type	Description
`kind`	`'file'`	The item kind.
`type`	`string`	The file type (usually a mime type).
`name`	`string`	The file name.

Methods

Method	Description
`getFile(): Promise<File>`	Returns the contents of the file as a blob.
`getText(): Promise<string>`	Returns the contents of the file as a string.

Properties

Name	Type	Description
`kind`	`'directory'`	The item kind.
`name`	`string`	The directory name.

Methods

Method	Description
`getEntries(): AsyncIterable<FileDropItem \| DirectoryDropItem>`	Returns the entries contained within the directory.

'copy'
  | 'link'
  | 'move'
  | 'cancel'

Name	Type	Description
`type`	`'item'`	The drop target type.
`key`	`Key`	The item key.
`dropPosition`	`DropPosition`	The drop position relative to the item.

'on'
  | 'before'
  | 'after'

Name	Type	Description
`items`	`DropItem[]`	The dropped items.
`dropOperation`	`DropOperation`	The drop operation that should occur.

Name	Type	Description
`items`	`DropItem[]`	The dropped items.
`dropOperation`	`DropOperation`	The drop operation that should occur.
`isInternal`	`boolean`	Whether the drag originated within the same collection as the drop.
`target`	`ItemDropTarget`	The drop target.

Name	Type	Description
`keys`	`Set<Key>`	The keys of the items that were reordered.
`dropOperation`	`DropOperation`	The drop operation that should occur.
`target`	`ItemDropTarget`	The drop target.

Method	Description
`has( (type: string \| \| symbol )): boolean`	Returns whether the drag contains data of the given type.

Name	Type	Description
`target`	`DropTarget`	The drop target.
`type`	`'dropenter'`	The event type.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

RootDropTarget | ItemDropTarget

Name	Type	Description
`type`	`'root'`	The event type.

Name	Type	Description
`target`	`DropTarget`	The drop target.
`type`	`'dropexit'`	The event type.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

Name	Type	Description
`target`	`DropTarget`	The drop target.
`type`	`'drop'`	The event type.
`dropOperation`	`DropOperation`	The drop operation that should occur.
`items`	`DropItem[]`	The dropped items.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

Name	Type	Default	Description
`getItems`	`( (keys: Set<Key> )) => DragItem[]`	`() => []`	A function that returns the items being dragged. If not specified, we assume that the collection is not draggable.
`renderPreview`	`( (keys: Set<Key>, , draggedKey: Key )) => JSX.Element`	—	Provide a custom drag preview. `draggedKey` represents the key of the item the user actually dragged.
`onDragStart`	`( (e: DraggableCollectionStartEvent )) => void`	—	Handler that is called when a drag operation is started.
`onDragMove`	`( (e: DraggableCollectionMoveEvent )) => void`	—	Handler that is called when the drag is moved.
`onDragEnd`	`( (e: DraggableCollectionEndEvent )) => void`	—	Handler that is called when the drag operation is ended, either as a result of a drop or a cancellation.
`getAllowedDropOperations`	`() => DropOperation[]`	—	Function that returns the drop operations that are allowed for the dragged items. If not provided, all drop operations are allowed.
`acceptedDragTypes`	`'all' \| Array<string \| symbol>`	`'all'`	The drag types that the droppable collection accepts. If the collection accepts directories, include `DIRECTORY_DRAG_TYPE` in your array of allowed types.
`onInsert`	`( (e: DroppableCollectionInsertDropEvent )) => void`	—	Handler that is called when external items are dropped "between" items.
`onRootDrop`	`( (e: DroppableCollectionRootDropEvent )) => void`	—	Handler that is called when external items are dropped on the droppable collection's root.
`onItemDrop`	`( (e: DroppableCollectionOnItemDropEvent )) => void`	—	Handler that is called when items are dropped "on" an item.
`onReorder`	`( (e: DroppableCollectionReorderEvent )) => void`	—	Handler that is called when items are reordered via drag in the source collection.
`shouldAcceptItemDrop`	`( (target: ItemDropTarget, , types: DragTypes )) => boolean`	—	A function returning whether a given target in the droppable collection is a valid "on" drop target for the current drag types.
`onDropEnter`	`( (e: DroppableCollectionEnterEvent )) => void`	—	Handler that is called when a valid drag enters a drop target.
`onDropExit`	`( (e: DroppableCollectionExitEvent )) => void`	—	Handler that is called when a valid drag exits a drop target.
`onDrop`	`( (e: DroppableCollectionDropEvent )) => void`	—	Handler that is called when a valid drag is dropped on a drop target. When defined, this overrides other drop handlers such as `onInsert`, and `onItemDrop`.
`getDropOperation`	`( target: DropTarget, types: DragTypes, allowedOperations: DropOperation[] ) => DropOperation`	—	A function returning the drop operation to be performed when items matching the given types are dropped on the drop target.

string | number

Name	Type	Description
`type`	`string`

Name	Type	Description
`keys`	`Set<Key>`	The keys of the items that were dragged.
`type`	`'dragstart'`	The event type.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

Name	Type	Description
`keys`	`Set<Key>`	The keys of the items that were dragged.
`type`	`'dragmove'`	The event type.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

Name	Type	Description
`keys`	`Set<Key>`	The keys of the items that were dragged.
`isInternal`	`boolean`	Whether the drop ended within the same collection as it originated.
`type`	`'dragend'`	The event type.
`dropOperation`	`DropOperation`	The drop operation that occurred.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

Name	Type	Description
`target`	`DropTarget`	The drop target.
`type`	`'dropactivate'`	The event type.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

Name	Type	Description
`dragAndDropHooks`	`DragHooks & DropHooks & {isVirtualDragging?: () => boolean, renderPreview?: ( (keys: Set<Key>, , draggedKey: Key )) => JSX.Element }`	Drag and drop hooks for the collection element.

Name	Type	Description
`useDraggableCollectionState`	`( (props: DraggableCollectionStateOpts )) => DraggableCollectionState`
`useDraggableCollection`	`( props: DraggableCollectionOptions, state: DraggableCollectionState, ref: RefObject<HTMLElement> ) => void`
`useDraggableItem`	`( (props: DraggableItemProps, , state: DraggableCollectionState )) => DraggableItemResult`
`DragPreview`	`any`

Name	Type	Description
`collection`	`Collection<Node<unknown>>`	A collection of items.
`selectionManager`	`MultipleSelectionManager`	An interface for reading and updating multiple selection state.
`onDragStart`	`( (e: DraggableCollectionStartEvent )) => void`	Handler that is called when a drag operation is started.
`onDragMove`	`( (e: DraggableCollectionMoveEvent )) => void`	Handler that is called when the drag is moved.
`onDragEnd`	`( (e: DraggableCollectionEndEvent )) => void`	Handler that is called when the drag operation is ended, either as a result of a drop or a cancellation.
`preview`	`RefObject<DragPreviewRenderer>`	The ref of the element that will be rendered as the drag preview while dragging.
`getAllowedDropOperations`	`() => DropOperation[]`	Function that returns the drop operations that are allowed for the dragged items. If not provided, all drop operations are allowed.

A generic interface to access a readonly sequential collection of unique keyed items.

Extends: Iterable

Properties

Name	Type	Description
`size`	`number`	The number of items in the collection.

Methods

Method	Description
`getKeys(): Iterable<Key>`	Iterate over all keys in the collection.
`getItem( (key: Key )): T \| null`	Get an item by its key.
`at( (idx: number )): T \| null`	Get an item by the index of its key.
`getKeyBefore( (key: Key )): Key \| null`	Get the key that comes before the given key in the collection.
`getKeyAfter( (key: Key )): Key \| null`	Get the key that comes after the given key in the collection.
`getFirstKey(): Key \| null`	Get the first key in the collection.
`getLastKey(): Key \| null`	Get the last key in the collection.
`getChildren( (key: Key )): Iterable<T>`	Iterate over the child items of the given key.
`getTextValue( (key: Key )): string`	Returns a string representation of the item's contents.

Name	Type	Description
`type`	`string`	The type of item this node represents.
`key`	`Key`	A unique key for the node.
`value`	`T \| null`	The object value the node was created from.
`level`	`number`	The level of depth this node is at in the heirarchy.
`hasChildNodes`	`boolean`	Whether this item has children, even if not loaded yet.
`rendered`	`ReactNode`	The rendered contents of this node (e.g. JSX).
`textValue`	`string`	A string value for this node, used for features like typeahead.
`aria-label`	`string`	An accessibility label for this node.
`index`	`number`	The index of this node within its parent.
`wrapper`	`( (element: ReactElement )) => ReactElement`	A function that should be called to wrap the rendered node.
`parentKey`	`Key \| null`	The key of the parent node.
`prevKey`	`Key \| null`	The key of the node before this node.
`nextKey`	`Key \| null`	The key of the node after this node.
`props`	`any`	Additional properties specific to a particular node type.

Properties

Name	Type	Description
`selectionMode`	`SelectionMode`	The type of selection that is allowed in the collection.
`selectionBehavior`	`SelectionBehavior`	The selection behavior for the collection.
`selectedKeys`	`Set<Key>`	The currently selected keys in the collection.
`isEmpty`	`boolean`	Whether the selection is empty.
`isSelectAll`	`boolean`	Whether all items in the collection are selected.
`firstSelectedKey`	`Key \| null`	The first selected key in the collection.
`lastSelectedKey`	`Key \| null`	The last selected key in the collection.
`disabledKeys`	`Set<Key>`	The currently disabled keys in the collection.
`disabledBehavior`	`DisabledBehavior`	Whether `disabledKeys` applies to selection, actions, or both.
`isFocused`	`boolean`	Whether the collection is currently focused.
`focusedKey`	`Key`	The current focused key in the collection.
`childFocusStrategy`	`FocusStrategy`	Whether the first or last child of the focused key should receive focus.
`disallowEmptySelection`	`boolean`	Whether the collection allows empty selection.

Methods

Method	Description
`isSelected( (key: Key )): boolean`	Returns whether a key is selected.
`isSelectionEqual( (selection: Set<Key> )): boolean`	Returns whether the current selection is equal to the given selection.
`extendSelection( (toKey: Key )): void`	Extends the selection to the given key.
`toggleSelection( (key: Key )): void`	Toggles whether the given key is selected.
`replaceSelection( (key: Key )): void`	Replaces the selection with only the given key.
`setSelectedKeys( (keys: Iterable<Key> )): void`	Replaces the selection with the given keys.
`selectAll(): void`	Selects all items in the collection.
`clearSelection(): void`	Removes all keys from the selection.
`toggleSelectAll(): void`	Toggles between select all and an empty selection.
`select( (key: Key, , e?: PressEvent \| LongPressEvent \| PointerEvent )): void`	Toggles, replaces, or extends selection to the given key depending on the pointer event and collection's selection mode.
`canSelectItem( (key: Key )): boolean`	Returns whether the given key can be selected.
`isDisabled( (key: Key )): boolean`	Returns whether the given key is non-interactive, i.e. both selection and actions are disabled.
`setSelectionBehavior( (selectionBehavior: SelectionBehavior )): void`	Sets the selection behavior for the collection.
`isLink( (key: Key )): boolean`	Returns whether the given key is a hyperlink.
`setFocused( (isFocused: boolean )): void`	Sets whether the collection is focused.
`setFocusedKey( (key: Key, , child?: FocusStrategy )): void`	Sets the focused key, and optionally, whether the first or last child of that key should receive focus.

'none'
  | 'single'
  | 'multiple'

'toggle' | 'replace'

'selection' | 'all'

Properties

Name	Type	Description
`type`	`'pressstart' \| 'pressend' \| 'pressup' \| 'press'`	The type of press event being fired.
`pointerType`	`PointerType`	The pointer type that triggered the press event.
`target`	`Element`	The target element of the press event.
`shiftKey`	`boolean`	Whether the shift keyboard modifier was held during the press event.
`ctrlKey`	`boolean`	Whether the ctrl keyboard modifier was held during the press event.
`metaKey`	`boolean`	Whether the meta keyboard modifier was held during the press event.
`altKey`	`boolean`	Whether the alt keyboard modifier was held during the press event.

Methods

Method	Description
`continuePropagation(): void`	By default, press events stop propagation to parent elements. In cases where a handler decides not to handle a specific event, it can call `continuePropagation()` to allow a parent to handle it.

'mouse'
  | 'pen'
  | 'touch'
  | 'keyboard'
  | 'virtual'

Name	Type	Description
`type`	`'longpressstart' \| 'longpressend' \| 'longpress'`	The type of long press event being fired.
`pointerType`	`PointerType`	The pointer type that triggered the press event.
`target`	`Element`	The target element of the press event.
`shiftKey`	`boolean`	Whether the shift keyboard modifier was held during the press event.
`ctrlKey`	`boolean`	Whether the ctrl keyboard modifier was held during the press event.
`metaKey`	`boolean`	Whether the meta keyboard modifier was held during the press event.
`altKey`	`boolean`	Whether the alt keyboard modifier was held during the press event.

'first' | 'last'

(
  (items: DragItem[],
  , callback: (
    (node: HTMLElement
  )) => void
)) => void

Properties

Name	Type	Description
`collection`	`Collection<Node<unknown>>`	A collection of items.
`selectionManager`	`MultipleSelectionManager`	An interface for reading and updating multiple selection state.
`draggedKey`	`Key \| null`	The key of the item that initiated a drag.
`draggingKeys`	`Set<Key>`	The keys of the items that are currently being dragged.
`preview`	`RefObject<DragPreviewRenderer>`	The ref of the element that will be rendered as the drag preview while dragging.
`getAllowedDropOperations`	`() => DropOperation[]`	Function that returns the drop operations that are allowed for the dragged items. If not provided, all drop operations are allowed.

Methods

Method	Description
`isDragging( (key: Key )): boolean`	Returns whether the given key is currently being dragged.
`getKeysForDrag( (key: Key )): Set<Key>`	Returns the keys of the items that will be dragged with the given key (e.g. selected items).
`getItems( (key: Key )): DragItem[]`	Returns the items to drag for the given key.
`startDrag( (key: Key, , event: DragStartEvent )): void`	Begins a drag for the given key. This triggers the onDragStart event.
`moveDrag( (event: DragMoveEvent )): void`	Triggers an onDragMove event.
`endDrag( (event: DraggableCollectionEndEvent )): void`	Ends the current drag, and emits an onDragEnd event.

Name	Type	Description
`type`	`'dragstart'`	The event type.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

Name	Type	Description
`type`	`'dragmove'`	The event type.
`x`	`number`	The x coordinate of the event, relative to the target element.
`y`	`number`	The y coordinate of the event, relative to the target element.

Name	Type	Description
`key`	`Key`	The key of the draggable item within the collection.
`hasDragButton`	`boolean`	Whether the item has an explicit focusable drag affordance to initiate accessible drag and drop mode. If true, the dragProps will omit these event handlers, and they will be applied to dragButtonProps instead.
`hasAction`	`boolean`	Whether the item has a primary action (e.g. Enter key or long press) that would conflict with initiating accessible drag and drop. If true, the Alt key must be held to start dragging with a keyboard, and long press is disabled until selection mode is entered. This should be passed from the associated collection item hook (e.g. useOption, useGridListItem, etc.).

Name	Type	Description
`dragProps`	`HTMLAttributes<HTMLElement>`	Props for the draggable item.
`dragButtonProps`	`AriaButtonProps`	Props for the explicit drag button affordance, if any.

Name	Type	Default	Description
`isDisabled`	`boolean`	—	Whether the button is disabled.
`children`	`ReactNode`	—	The content to display in the button.
`onPress`	`( (e: PressEvent )) => void`	—	Handler that is called when the press is released over the target.
`onPressStart`	`( (e: PressEvent )) => void`	—	Handler that is called when a press interaction starts.
`onPressEnd`	`( (e: PressEvent )) => void`	—	Handler that is called when a press interaction ends, either over the target or when the pointer leaves the target.
`onPressChange`	`( (isPressed: boolean )) => void`	—	Handler that is called when the press state changes.
`onPressUp`	`( (e: PressEvent )) => void`	—	Handler that is called when a press is released over the target, regardless of whether it started on the target or not.
`autoFocus`	`boolean`	—	Whether the element should receive focus on render.
`onFocus`	`( (e: FocusEvent<Target> )) => void`	—	Handler that is called when the element receives focus.
`onBlur`	`( (e: FocusEvent<Target> )) => void`	—	Handler that is called when the element loses focus.
`onFocusChange`	`( (isFocused: boolean )) => void`	—	Handler that is called when the element's focus status changes.
`onKeyDown`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is pressed.
`onKeyUp`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is released.
`href`	`string`	—	A URL to link to if elementType="a".
`target`	`string`	—	The target window for the link.
`rel`	`string`	—	The relationship between the linked resource and the current page. See MDN.
`elementType`	`ElementType \| JSXElementConstructor<any>`	`'button'`	The HTML element or React element used to render the button, e.g. 'div', 'a', or `RouterLink`.
`aria-expanded`	`boolean \| 'true' \| 'false'`	—	Indicates whether the element, or another grouping element it controls, is currently expanded or collapsed.
`aria-haspopup`	`boolean \| 'menu' \| 'listbox' \| 'tree' \| 'grid' \| 'dialog' \| 'true' \| 'false'`	—	Indicates the availability and type of interactive popup element, such as menu or dialog, that can be triggered by an element.
`aria-controls`	`string`	—	Identifies the element (or elements) whose contents or presence are controlled by the current element.
`aria-pressed`	`boolean \| 'true' \| 'false' \| 'mixed'`	—	Indicates the current "pressed" state of toggle buttons.
`type`	`'button' \| 'submit' \| 'reset'`	`'button'`	The behavior of the button when used in an HTML form.
`excludeFromTabOrder`	`boolean`	—	Whether to exclude the element from the sequential tab order. If true, the element will not be focusable via the keyboard by tabbing. This should be avoided except in rare scenarios where an alternative means of accessing the element or its functionality via the keyboard is available.
`id`	`string`	—	The element's unique identifier. See MDN.
`aria-label`	`string`	—	Defines a string value that labels the current element.
`aria-labelledby`	`string`	—	Identifies the element (or elements) that labels the current element.
`aria-describedby`	`string`	—	Identifies the element (or elements) that describes the object.
`aria-details`	`string`	—	Identifies the element (or elements) that provide a detailed, extended description for the object.

BaseEvent<ReactKeyboardEvent<any>>

SyntheticEvent & {stopPropagation: () => void,
continuePropagation: () => void
}

Name	Type	Description
`useDroppableCollectionState`	`( (props: DroppableCollectionStateOptions )) => DroppableCollectionState`
`useDroppableCollection`	`( props: DroppableCollectionOptions, state: DroppableCollectionState, ref: RefObject<HTMLElement> ) => DroppableCollectionResult`
`useDroppableItem`	`( options: DroppableItemOptions, state: DroppableCollectionState, ref: RefObject<HTMLElement> ) => DroppableItemResult`
`useDropIndicator`	`( props: DropIndicatorProps, state: DroppableCollectionState, ref: RefObject<HTMLElement> ) => DropIndicatorAria`

Name	Type	Default	Description
`collection`	`Collection<Node<unknown>>`	—	A collection of items.
`selectionManager`	`MultipleSelectionManager`	—	An interface for reading and updating multiple selection state.
`acceptedDragTypes`	`'all' \| Array<string \| symbol>`	`'all'`	The drag types that the droppable collection accepts. If the collection accepts directories, include `DIRECTORY_DRAG_TYPE` in your array of allowed types.
`onInsert`	`( (e: DroppableCollectionInsertDropEvent )) => void`	—	Handler that is called when external items are dropped "between" items.
`onRootDrop`	`( (e: DroppableCollectionRootDropEvent )) => void`	—	Handler that is called when external items are dropped on the droppable collection's root.
`onItemDrop`	`( (e: DroppableCollectionOnItemDropEvent )) => void`	—	Handler that is called when items are dropped "on" an item.
`onReorder`	`( (e: DroppableCollectionReorderEvent )) => void`	—	Handler that is called when items are reordered via drag in the source collection.
`shouldAcceptItemDrop`	`( (target: ItemDropTarget, , types: DragTypes )) => boolean`	—	A function returning whether a given target in the droppable collection is a valid "on" drop target for the current drag types.
`onDropEnter`	`( (e: DroppableCollectionEnterEvent )) => void`	—	Handler that is called when a valid drag enters a drop target.
`onDropExit`	`( (e: DroppableCollectionExitEvent )) => void`	—	Handler that is called when a valid drag exits a drop target.
`onDrop`	`( (e: DroppableCollectionDropEvent )) => void`	—	Handler that is called when a valid drag is dropped on a drop target. When defined, this overrides other drop handlers such as `onInsert`, and `onItemDrop`.
`getDropOperation`	`( target: DropTarget, types: DragTypes, allowedOperations: DropOperation[] ) => DropOperation`	—	A function returning the drop operation to be performed when items matching the given types are dropped on the drop target.

Properties

Name	Type	Description
`collection`	`Collection<Node<unknown>>`	A collection of items.
`selectionManager`	`MultipleSelectionManager`	An interface for reading and updating multiple selection state.
`target`	`DropTarget \| null`	The current drop target.

Methods

Method	Description
`setTarget( (target: DropTarget )): void`	Sets the current drop target.
`isDropTarget( (target: DropTarget )): boolean`	Returns whether the given target is equivalent to the current drop target.
`getDropOperation( (e: DropOperationEvent )): DropOperation`	Returns the drop operation for the given parameters.

Name	Type	Description
`target`	`DropTarget`
`types`	`DragTypes`
`allowedOperations`	`DropOperation[]`
`isInternal`	`boolean`
`draggingKeys`	`Set<Key>`

Name	Type	Default	Description
`keyboardDelegate`	`KeyboardDelegate`	—	A delegate object that implements behavior for keyboard focus movement.
`dropTargetDelegate`	`DropTargetDelegate`	—	A delegate object that provides drop targets for pointer coordinates within the collection.
`acceptedDragTypes`	`'all' \| Array<string \| symbol>`	`'all'`	The drag types that the droppable collection accepts. If the collection accepts directories, include `DIRECTORY_DRAG_TYPE` in your array of allowed types.
`onInsert`	`( (e: DroppableCollectionInsertDropEvent )) => void`	—	Handler that is called when external items are dropped "between" items.
`onRootDrop`	`( (e: DroppableCollectionRootDropEvent )) => void`	—	Handler that is called when external items are dropped on the droppable collection's root.
`onItemDrop`	`( (e: DroppableCollectionOnItemDropEvent )) => void`	—	Handler that is called when items are dropped "on" an item.
`onReorder`	`( (e: DroppableCollectionReorderEvent )) => void`	—	Handler that is called when items are reordered via drag in the source collection.
`shouldAcceptItemDrop`	`( (target: ItemDropTarget, , types: DragTypes )) => boolean`	—	A function returning whether a given target in the droppable collection is a valid "on" drop target for the current drag types.
`onDropEnter`	`( (e: DroppableCollectionEnterEvent )) => void`	—	Handler that is called when a valid drag enters a drop target.
`onDropExit`	`( (e: DroppableCollectionExitEvent )) => void`	—	Handler that is called when a valid drag exits a drop target.
`onDrop`	`( (e: DroppableCollectionDropEvent )) => void`	—	Handler that is called when a valid drag is dropped on a drop target. When defined, this overrides other drop handlers such as `onInsert`, and `onItemDrop`.
`getDropOperation`	`( target: DropTarget, types: DragTypes, allowedOperations: DropOperation[] ) => DropOperation`	—	A function returning the drop operation to be performed when items matching the given types are dropped on the drop target.

Method	Description
`getKeyBelow( (key: Key )): Key \| null`	Returns the key visually below the given one, or `null` for none.
`getKeyAbove( (key: Key )): Key \| null`	Returns the key visually above the given one, or `null` for none.
`getKeyLeftOf( (key: Key )): Key \| null`	Returns the key visually to the left of the given one, or `null` for none.
`getKeyRightOf( (key: Key )): Key \| null`	Returns the key visually to the right of the given one, or `null` for none.
`getKeyPageBelow( (key: Key )): Key \| null`	Returns the key visually one page below the given one, or `null` for none.
`getKeyPageAbove( (key: Key )): Key \| null`	Returns the key visually one page above the given one, or `null` for none.
`getFirstKey( (key?: Key, , global?: boolean )): Key \| null`	Returns the first key, or `null` for none.
`getLastKey( (key?: Key, , global?: boolean )): Key \| null`	Returns the last key, or `null` for none.
`getKeyForSearch( (search: string, , fromKey?: Key )): Key \| null`	Returns the next key after `fromKey` that matches the given search string, or `null` for none.

Method	Description
`getDropTargetFromPoint( x: number, y: number, isValidDropTarget: ( (target: DropTarget )) => boolean ): DropTarget \| null`	Returns a drop target within a collection for the given x and y coordinates. The point is provided relative to the top left corner of the collection container. A drop target can be checked to see if it is valid using the provided `isValidDropTarget` function.

Name	Type	Description
`dropIndicatorProps`	`HTMLAttributes<HTMLElement>`	Props for the drop indicator element.
`isDropTarget`	`boolean`	Whether the drop indicator is currently the active drop target.
`isHidden`	`boolean`	Whether the drop indicator is hidden, both visually and from assistive technology. Use this to determine whether to omit the element from the DOM entirely.