useDrop

Handles drop interactions for an element, with support for traditional mouse and touch based drag and drop, in addition to full parity for keyboard and screen reader users.

install	`yarn add react-aria`
version	3.32.0
usage	`import {useDrop} from 'react-aria'`

View repository

GitHub

View package

NPM

API#

useDrop(
  (options: DropOptions
)): DropResult

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.

React Aria supports traditional mouse and touch based drag and drop, but also implements keyboard and screen reader friendly interactions. Users can press Enter on a draggable element to enter drag and drop mode. Then, they can press Tab to navigate between drop targets, and Enter to drop or Escape to cancel. Touch screen reader users can also drag by double tapping to activate drag and drop mode, swiping between drop targets, and double tapping again to drop.

See the drag and drop introduction to learn more.

Example#

This example shows how to make a simple drop target that accepts plain text data. In order to support keyboard and screen reader drag interactions, the element must be focusable and have an ARIA role (in this case, button). While a drag is hovered over it, a blue outline is rendered by applying an additional CSS class.

import type {TextDropItem} from 'react-aria';
import {useDrop} from 'react-aria';

function DropTarget() {
  let [dropped, setDropped] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      let items = await Promise.all(
        e.items
          .filter((item) =>
            item.kind === 'text' && item.types.has('text/plain')
          )
          .map((item: TextDropItem) => item.getText('text/plain'))
      );
      setDropped(items.join('\n'));
    }
  });

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${isDropTarget ? 'target' : ''}`}
    >
      {dropped || 'Drop here'}
    </div>
  );
}

<Draggable />
<DropTarget />

import type {TextDropItem} from 'react-aria';
import {useDrop} from 'react-aria';

function DropTarget() {
  let [dropped, setDropped] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      let items = await Promise.all(
        e.items
          .filter((item) =>
            item.kind === 'text' &&
            item.types.has('text/plain')
          )
          .map((item: TextDropItem) =>
            item.getText('text/plain')
          )
      );
      setDropped(items.join('\n'));
    }
  });

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${
        isDropTarget ? 'target' : ''
      }`}
    >
      {dropped || 'Drop here'}
    </div>
  );
}

<Draggable />
<DropTarget />

import type {TextDropItem} from 'react-aria';
import {useDrop} from 'react-aria';

function DropTarget() {
  let [
    dropped,
    setDropped
  ] = React.useState(
    null
  );
  let ref = React.useRef(
    null
  );
  let {
    dropProps,
    isDropTarget
  } = useDrop({
    ref,
    async onDrop(e) {
      let items =
        await Promise
          .all(
            e.items
              .filter(
                (item) =>
                  item
                      .kind ===
                    'text' &&
                  item
                    .types
                    .has(
                      'text/plain'
                    )
              )
              .map((
                item:
                  TextDropItem
              ) =>
                item
                  .getText(
                    'text/plain'
                  )
              )
          );
      setDropped(
        items.join('\n')
      );
    }
  });

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${
        isDropTarget
          ? 'target'
          : ''
      }`}
    >
      {dropped ||
        'Drop here'}
    </div>
  );
}

<Draggable />
<DropTarget />

Show CSS

.draggable {
  display: inline-block;
  vertical-align: top;
  border: 1px solid gray;
  padding: 10px;
  margin-right: 20px;
}

.draggable.dragging {
  opacity: 0.5;
}

.droppable {
  width: 100px;
  height: 80px;
  border-radius: 6px;
  display: inline-block;
  padding: 20px;
  border: 2px dotted gray;
  white-space: pre-wrap;
  overflow: auto;
}

.droppable.target {
  border: 2px solid var(--blue);
}

.draggable {
  display: inline-block;
  vertical-align: top;
  border: 1px solid gray;
  padding: 10px;
  margin-right: 20px;
}

.draggable.dragging {
  opacity: 0.5;
}

.droppable {
  width: 100px;
  height: 80px;
  border-radius: 6px;
  display: inline-block;
  padding: 20px;
  border: 2px dotted gray;
  white-space: pre-wrap;
  overflow: auto;
}

.droppable.target {
  border: 2px solid var(--blue);
}

.draggable {
  display: inline-block;
  vertical-align: top;
  border: 1px solid gray;
  padding: 10px;
  margin-right: 20px;
}

.draggable.dragging {
  opacity: 0.5;
}

.droppable {
  width: 100px;
  height: 80px;
  border-radius: 6px;
  display: inline-block;
  padding: 20px;
  border: 2px dotted gray;
  white-space: pre-wrap;
  overflow: auto;
}

.droppable.target {
  border: 2px solid var(--blue);
}

Draggable#

The Draggable component used above is defined below. See useDrag for more details and documentation.

Show code

import {useDrag} from 'react-aria';

function Draggable() {
  let { dragProps, isDragging } = useDrag({
    getItems() {
      return [{
        'text/plain': 'hello world',
        'my-app-custom-type': JSON.stringify({ message: 'hello world' })
      }];
    }
  });

  return (
    <div
      {...dragProps}
      role="button"
      tabIndex={0}
      className={`draggable ${isDragging ? 'dragging' : ''}`}
    >
      Drag me
    </div>
  );
}

import {useDrag} from 'react-aria';

function Draggable() {
  let { dragProps, isDragging } = useDrag({
    getItems() {
      return [{
        'text/plain': 'hello world',
        'my-app-custom-type': JSON.stringify({
          message: 'hello world'
        })
      }];
    }
  });

  return (
    <div
      {...dragProps}
      role="button"
      tabIndex={0}
      className={`draggable ${
        isDragging ? 'dragging' : ''
      }`}
    >
      Drag me
    </div>
  );
}

import {useDrag} from 'react-aria';

function Draggable() {
  let {
    dragProps,
    isDragging
  } = useDrag({
    getItems() {
      return [{
        'text/plain':
          'hello world',
        'my-app-custom-type':
          JSON.stringify(
            {
              message:
                'hello world'
            }
          )
      }];
    }
  });

  return (
    <div
      {...dragProps}
      role="button"
      tabIndex={0}
      className={`draggable ${
        isDragging
          ? 'dragging'
          : ''
      }`}
    >
      Drag me
    </div>
  );
}

Drop data#

useDrop allows users to drop one or more drag items, each of which contains data to be transferred from the drag source to drop target. There are three kinds of drag items:

text – represents data inline as a string in one or more formats
file – references a file on the user's device
directory – references the contents of a directory

Text#

A TextDropItem represents textual data in one or more different formats. These may be either standard mime types or custom app-specific formats. Representing data in multiple formats allows drop targets both within and outside an application to choose data in a format that they understand. For example, a complex object may be serialized in a custom format for use within an application, with fallbacks in plain text and/or rich HTML that can be used when a user drops data from an external application.

The example below finds the first available item that includes a custom app-specific type. The same draggable component as used in the above example is used here, but rather than displaying the plain text representation, the custom format is used instead.

function DropTarget() {
  let [dropped, setDropped] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items.find((item) =>
        item.kind === 'text' && item.types.has('my-app-custom-type')
      ) as TextDropItem;
      if (item) {
        setDropped(await item.getText('my-app-custom-type'));
      }
    }  });

  // ...
}

function DropTarget() {
  let [dropped, setDropped] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items.find((item) =>
        item.kind === 'text' &&
        item.types.has('my-app-custom-type')
      ) as TextDropItem;
      if (item) {
        setDropped(
          await item.getText('my-app-custom-type')
        );
      }
    }  });

  // ...
}

function DropTarget() {
  let [
    dropped,
    setDropped
  ] = React.useState(
    null
  );
  let ref = React.useRef(
    null
  );
  let {
    dropProps,
    isDropTarget
  } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items
        .find((item) =>
          item.kind ===
            'text' &&
          item.types.has(
            'my-app-custom-type'
          )
        ) as TextDropItem;
      if (item) {
        setDropped(
          await item
            .getText(
              'my-app-custom-type'
            )
        );
      }
    }  });

  // ...
}

Files#

A FileDropItem references a file on the user's device. It includes the name and mime type of the file, and methods to read the contents as plain text, or retrieve a native File object which can be attached to form data for uploading.

This example accepts JPEG and PNG image files, and renders them by creating a local object URL.

import type {FileDropItem} from 'react-aria';

function DropTarget() {
  let [file, setFile] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items.find((item) =>
        item.kind === 'file' &&
        (item.type === 'image/jpeg' || item.type === 'image/png')
      ) as FileDropItem;
      if (item) {
        setFile(URL.createObjectURL(await item.getFile()));
      }
    }  });

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${isDropTarget ? 'target' : ''}`}
    >
      {file
        ? (
          <img
            src={file}
            style={{ width: '100%', height: '100%', objectFit: 'contain' }}
          />
        )
        : 'Drop image here'}
    </div>
  );
}

import type {FileDropItem} from 'react-aria';

function DropTarget() {
  let [file, setFile] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items.find((item) =>
        item.kind === 'file' &&
        (item.type === 'image/jpeg' ||
          item.type === 'image/png')
      ) as FileDropItem;
      if (item) {
        setFile(URL.createObjectURL(await item.getFile()));
      }
    }  });

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${
        isDropTarget ? 'target' : ''
      }`}
    >
      {file
        ? (
          <img
            src={file}
            style={{
              width: '100%',
              height: '100%',
              objectFit: 'contain'
            }}
          />
        )
        : 'Drop image here'}
    </div>
  );
}

import type {FileDropItem} from 'react-aria';

function DropTarget() {
  let [file, setFile] =
    React.useState(null);
  let ref = React.useRef(
    null
  );
  let {
    dropProps,
    isDropTarget
  } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items
        .find((item) =>
          item.kind ===
            'file' &&
          (item.type ===
              'image/jpeg' ||
            item.type ===
              'image/png')
        ) as FileDropItem;
      if (item) {
        setFile(
          URL
            .createObjectURL(
              await item
                .getFile()
            )
        );
      }
    }  });

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${
        isDropTarget
          ? 'target'
          : ''
      }`}
    >
      {file
        ? (
          <img
            src={file}
            style={{
              width:
                '100%',
              height:
                '100%',
              objectFit:
                'contain'
            }}
          />
        )
        : 'Drop image here'}
    </div>
  );
}

Directories#

A DirectoryDropItem references the contents of a directory on the user's device. It includes the name of the directory, as well as a method to iterate through the files and folders within the directory. The contents of any folders within the directory can be accessed recursively.

The getEntries method returns an async iterable object, which can be used in a for await...of loop. This provides each item in the directory as either a FileDropItem or DirectoryDropItem, and you can access the contents of each file as discussed above.

This example renders the file names within a dropped directory in a grid.

import type {DirectoryDropItem} from 'react-aria';
import File from '@spectrum-icons/workflow/FileTxt';
import Folder from '@spectrum-icons/workflow/Folder';

function DropTarget() {
  let [files, setFiles] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      // Find the first dropped item that is a directory.
      let dir = e.items.find((item) =>
        item.kind === 'directory'
      ) as DirectoryDropItem;
      if (dir) {
        // Read entries in directory and update state with relevant info.
        let files = [];
        for await (let entry of dir.getEntries()) {
          files.push({
            name: entry.name,
            kind: entry.kind
          });
        }
        setFiles(files);
      }
    }  });

  let contents = <>Drop directory here</>;
  if (files) {
    contents = (
      <ul>
        {files.map((f) => (
          <li key={f.name}>
            {f.kind === 'directory' ? <Folder /> : <File />}
            <span>{f.name}</span>
          </li>
        ))}
      </ul>
    );
  }

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable grid ${isDropTarget ? 'target' : ''}`}
    >
      {contents}
    </div>
  );
}

import type {DirectoryDropItem} from 'react-aria';
import File from '@spectrum-icons/workflow/FileTxt';
import Folder from '@spectrum-icons/workflow/Folder';

function DropTarget() {
  let [files, setFiles] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      // Find the first dropped item that is a directory.
      let dir = e.items.find((item) =>
        item.kind === 'directory'
      ) as DirectoryDropItem;
      if (dir) {
        // Read entries in directory and update state with relevant info.
        let files = [];
        for await (let entry of dir.getEntries()) {
          files.push({
            name: entry.name,
            kind: entry.kind
          });
        }
        setFiles(files);
      }
    }  });

  let contents = <>Drop directory here</>;
  if (files) {
    contents = (
      <ul>
        {files.map((f) => (
          <li key={f.name}>
            {f.kind === 'directory' ? <Folder /> : <File />}
            <span>{f.name}</span>
          </li>
        ))}
      </ul>
    );
  }

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable grid ${
        isDropTarget ? 'target' : ''
      }`}
    >
      {contents}
    </div>
  );
}

import type {DirectoryDropItem} from 'react-aria';
import File from '@spectrum-icons/workflow/FileTxt';
import Folder from '@spectrum-icons/workflow/Folder';

function DropTarget() {
  let [files, setFiles] =
    React.useState(null);
  let ref = React.useRef(
    null
  );
  let {
    dropProps,
    isDropTarget
  } = useDrop({
    ref,
    async onDrop(e) {
      // Find the first dropped item that is a directory.
      let dir = e.items
        .find((item) =>
          item.kind ===
            'directory'
        ) as DirectoryDropItem;
      if (dir) {
        // Read entries in directory and update state with relevant info.
        let files = [];
        for await (
          let entry
            of dir
              .getEntries()
        ) {
          files.push({
            name:
              entry.name,
            kind:
              entry.kind
          });
        }
        setFiles(files);
      }
    }  });

  let contents = (
    <>
      Drop directory here
    </>
  );
  if (files) {
    contents = (
      <ul>
        {files.map(
          (f) => (
            <li
              key={f
                .name}
            >
              {f.kind ===
                  'directory'
                ? (
                  <Folder />
                )
                : (
                  <File />
                )}
              <span>
                {f.name}
              </span>
            </li>
          )
        )}
      </ul>
    );
  }

  return (
    <div
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable grid ${
        isDropTarget
          ? 'target'
          : ''
      }`}
    >
      {contents}
    </div>
  );
}

Show CSS

.grid {
  display: block;
  width: auto;
  height: auto;
  min-height: 80px;
}

.grid ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, 100px);
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 20px;
}

.grid li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.grid li svg {
  flex: 0 0 auto;
}

.grid li span {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.grid {
  display: block;
  width: auto;
  height: auto;
  min-height: 80px;
}

.grid ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, 100px);
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 20px;
}

.grid li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.grid li svg {
  flex: 0 0 auto;
}

.grid li span {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.grid {
  display: block;
  width: auto;
  height: auto;
  min-height: 80px;
}

.grid ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, 100px);
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 20px;
}

.grid li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.grid li svg {
  flex: 0 0 auto;
}

.grid li span {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

Drop operations#

A DropOperation is an indication of what will happen when dragged data is dropped on a particular drop target. These are:

move – indicates that the dragged data will be moved from its source location to the target location.
copy – indicates that the dragged data will be copied to the target destination.
link – indicates that there will be a relationship established between the source and target locations.
cancel – indicates that the drag and drop operation will be canceled, resulting in no changes made to the source or target.

Many operating systems display these in the form of a cursor change, e.g. a plus sign to indicate a copy operation. The user may also be able to use a modifier key to choose which drop operation to perform, such as Option or Alt to switch from move to copy.

The drag source can specify which drop operations are allowed for the dragged data (see the useDrag docs for how to customize this). By default, the first allowed operation is allowed by drop targets, meaning that the drop target accepts data of any type and operation.

getDropOperation#

The getDropOperation function passed to useDrop can be used to provide appropriate feedback to the user when a drag hovers over the drop target. If a drop target only supports data of specific types (e.g. images, videos, text, etc.), then it should implement getDropOperation and return 'cancel' for types that aren't supported. This will prevent visual feedback indicating that the drop target accepts the dragged data when this is not true.

When the data is supported, either return one of the drop operations in allowedOperation or a specific drop operation if only that drop operation is supported. If the returned operation is not in allowedOperations, then the drop target will act as if 'cancel' was returned.

In the below example, the drop target only supports dropping PNG images. If a PNG is dragged over the target, it will be highlighted and the operating system displays a copy cursor. If another type is dragged over the target, then there is no visual feedback, indicating that a drop is not accepted there. If the user holds a modifier key such as Control while dragging over the drop target in order to change the drop operation, then the drop target does not accept the drop.

function DropTarget() {
  let [file, setFile] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    getDropOperation(types, allowedOperations) {
      return types.has('image/png') ? 'copy' : 'cancel';
    },    async onDrop(e) {
      let item = e.items.find((item) =>
        item.kind === 'file' && item.type === 'image/png'
      ) as FileDropItem;
      if (item) {
        setFile(URL.createObjectURL(await item.getFile()));
      }
    }
  });

  // ...
}

function DropTarget() {
  let [file, setFile] = React.useState(null);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    getDropOperation(types, allowedOperations) {
      return types.has('image/png') ? 'copy' : 'cancel';
    },    async onDrop(e) {
      let item = e.items.find((item) =>
        item.kind === 'file' && item.type === 'image/png'
      ) as FileDropItem;
      if (item) {
        setFile(URL.createObjectURL(await item.getFile()));
      }
    }
  });

  // ...
}

function DropTarget() {
  let [file, setFile] =
    React.useState(null);
  let ref = React.useRef(
    null
  );
  let {
    dropProps,
    isDropTarget
  } = useDrop({
    ref,
    getDropOperation(
      types,
      allowedOperations
    ) {
      return types.has(
          'image/png'
        )
        ? 'copy'
        : 'cancel';
    },    async onDrop(e) {
      let item = e.items
        .find((item) =>
          item.kind ===
            'file' &&
          item.type ===
            'image/png'
        ) as FileDropItem;
      if (item) {
        setFile(
          URL
            .createObjectURL(
              await item
                .getFile()
            )
        );
      }
    }
  });

  // ...
}

onDrop#

The onDrop event also includes the dropOperation. This can be used to perform different actions accordingly, for example, when communicating with a backend API.

function DropTarget(props) {
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items.find((item) =>
        item.kind === 'text' && item.types.has('my-app-file')
      ) as TextDropItem;
      if (!item) {
        return;
      }

      let data = JSON.parse(await item.getText('my-app-file'));
      switch (e.dropOperation) {
        case 'move':
          MyAppFileService.move(data.filePath, props.filePath);
          break;
        case 'copy':
          MyAppFileService.copy(data.filePath, props.filePath);
          break;
        case 'link':
          MyAppFileService.link(data.filePath, props.filePath);
          break;
      }    }
  });

  // ...
}

function DropTarget(props) {
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items.find((item) =>
        item.kind === 'text' &&
        item.types.has('my-app-file')
      ) as TextDropItem;
      if (!item) {
        return;
      }

      let data = JSON.parse(
        await item.getText('my-app-file')
      );
      switch (e.dropOperation) {
        case 'move':
          MyAppFileService.move(
            data.filePath,
            props.filePath
          );
          break;
        case 'copy':
          MyAppFileService.copy(
            data.filePath,
            props.filePath
          );
          break;
        case 'link':
          MyAppFileService.link(
            data.filePath,
            props.filePath
          );
          break;
      }    }
  });

  // ...
}

function DropTarget(
  props
) {
  let ref = React.useRef(
    null
  );
  let {
    dropProps,
    isDropTarget
  } = useDrop({
    ref,
    async onDrop(e) {
      let item = e.items
        .find((item) =>
          item.kind ===
            'text' &&
          item.types.has(
            'my-app-file'
          )
        ) as TextDropItem;
      if (!item) {
        return;
      }

      let data = JSON
        .parse(
          await item
            .getText(
              'my-app-file'
            )
        );
      switch (
        e.dropOperation
      ) {
        case 'move':
          MyAppFileService
            .move(
              data
                .filePath,
              props
                .filePath
            );
          break;
        case 'copy':
          MyAppFileService
            .copy(
              data
                .filePath,
              props
                .filePath
            );
          break;
        case 'link':
          MyAppFileService
            .link(
              data
                .filePath,
              props
                .filePath
            );
          break;
      }    }
  });

  // ...
}

Events#

Drop targets receive a number of events during a drag session. These are:

Name	Type	Description
`onDropEnter`	`( (e: DropEnterEvent )) => void`	Handler that is called when a valid drag enters the drop target.
`onDropMove`	`( (e: DropMoveEvent )) => void`	Handler that is called when a valid drag is moved within the drop target.
`onDropExit`	`( (e: DropExitEvent )) => void`	Handler that is called when a valid drag exits the drop target.
`onDrop`	`( (e: DropEvent )) => void`	Handler that is called when a valid drag is dropped on the drop target.

This example logs all events that occur within the drop target:

function DropTarget() {
  let [events, setEvents] = React.useState([]);
  let onEvent = (e) => setEvents((events) => [JSON.stringify(e), ...events]);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    onDropEnter: onEvent,
    onDropMove: onEvent,
    onDropExit: onEvent,
    onDrop: onEvent
  });

  return (
    <ul
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${isDropTarget ? 'target' : ''}`}
      style={{ display: 'block', width: 'auto' }}
    >
      {events.map((e, i) => <li key={i}>{e}</li>)}
    </ul>
  );
}

<Draggable />
<DropTarget />

function DropTarget() {
  let [events, setEvents] = React.useState([]);
  let onEvent = (e) =>
    setEvents((events) => [JSON.stringify(e), ...events]);
  let ref = React.useRef(null);
  let { dropProps, isDropTarget } = useDrop({
    ref,
    onDropEnter: onEvent,
    onDropMove: onEvent,
    onDropExit: onEvent,
    onDrop: onEvent
  });

  return (
    <ul
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${
        isDropTarget ? 'target' : ''
      }`}
      style={{ display: 'block', width: 'auto' }}
    >
      {events.map((e, i) => <li key={i}>{e}</li>)}
    </ul>
  );
}

<Draggable />
<DropTarget />

function DropTarget() {
  let [
    events,
    setEvents
  ] = React.useState([]);
  let onEvent = (e) =>
    setEvents(
      (events) => [
        JSON.stringify(
          e
        ),
        ...events
      ]
    );
  let ref = React.useRef(
    null
  );
  let {
    dropProps,
    isDropTarget
  } = useDrop({
    ref,
    onDropEnter: onEvent,
    onDropMove: onEvent,
    onDropExit: onEvent,
    onDrop: onEvent
  });

  return (
    <ul
      {...dropProps}
      role="button"
      tabIndex={0}
      ref={ref}
      className={`droppable ${
        isDropTarget
          ? 'target'
          : ''
      }`}
      style={{
        display: 'block',
        width: 'auto'
      }}
    >
      {events.map((
        e,
        i
      ) => (
        <li key={i}>
          {e}
        </li>
      ))}
    </ul>
  );
}

<Draggable />
<DropTarget />

Name	Type	Description
`ref`	`RefObject<HTMLElement>`	A ref for the droppable element.
`getDropOperation`	`( (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.
`getDropOperationForPoint`	`( types: DragTypes, allowedOperations: DropOperation[], x: number, y: number ) => DropOperation`	A function that returns the drop operation for a specific point within the target.
`onDropEnter`	`( (e: DropEnterEvent )) => void`	Handler that is called when a valid drag enters the drop target.
`onDropMove`	`( (e: DropMoveEvent )) => void`	Handler that is called when a valid drag is moved within the drop target.
`onDropExit`	`( (e: DropExitEvent )) => void`	Handler that is called when a valid drag exits the drop target.
`onDrop`	`( (e: DropEvent )) => void`	Handler that is called when a valid drag is dropped on the drop target.
`hasDropButton`	`boolean`	Whether the item has an explicit focusable drop affordance to initiate accessible drag and drop mode. If true, the dropProps will omit these event handlers, and they will be applied to dropButtonProps instead.

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

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

Name	Type	Description
`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.

Name	Type	Description
`type`	`'dropmove'`	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`	`'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
`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
`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.

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.

Name	Type	Description
`dropProps`	`HTMLAttributes<HTMLElement>`	Props for the droppable element.
`isDropTarget`	`boolean`	Whether the drop target is currently focused or hovered.
`dropButtonProps`	`AriaButtonProps`	Props for the explicit drop 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.

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'

BaseEvent<ReactKeyboardEvent<any>>

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