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react-dnd-html5-backend

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react-dnd-html5-backend

HTML5 backend for React DnD


Version published
Weekly downloads
1.8M
decreased by-8.92%
Maintainers
5
Weekly downloads
 
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What is react-dnd-html5-backend?

The react-dnd-html5-backend package is a backend implementation for react-dnd (React Drag and Drop) that uses the HTML5 drag and drop API. It enables you to implement drag and drop functionalities in your React applications using the native HTML5 API.

What are react-dnd-html5-backend's main functionalities?

Drag Source

This code sample demonstrates how to create a draggable component using the useDrag hook from react-dnd. The component becomes a drag source that can be dragged around the screen.

import { useDrag } from 'react-dnd';

function DraggableComponent() {
  const [{ isDragging }, drag] = useDrag(() => ({
    type: 'BOX',
    collect: (monitor) => ({
      isDragging: !!monitor.isDragging(),
    }),
  }));

  return (
    <div ref={drag} style={{ opacity: isDragging ? 0.5 : 1 }}>
      Draggable Content
    </div>
  );
}

Drop Target

This code sample shows how to create a drop target using the useDrop hook from react-dnd. The component can accept draggable items and provides visual feedback when an item is dragged over it.

import { useDrop } from 'react-dnd';

function DroppableComponent() {
  const [{ canDrop, isOver }, drop] = useDrop(() => ({
    accept: 'BOX',
    drop: () => ({ name: 'DroppableComponent' }),
    collect: (monitor) => ({
      isOver: monitor.isOver(),
      canDrop: monitor.canDrop(),
    }),
  }));

  return (
    <div ref={drop} style={{ backgroundColor: isOver ? 'green' : 'white' }}>
      {canDrop ? 'Release to drop' : 'Drag a box here'}
    </div>
  );
}

Custom Drag Layer

This code sample illustrates how to use a custom drag layer to render a custom preview of the draggable item. The useDragLayer hook provides the necessary state to render the preview at the correct position.

import { useDragLayer } from 'react-dnd';

function CustomDragLayer() {
  const { isDragging, item, currentOffset } = useDragLayer((monitor) => ({
    item: monitor.getItem(),
    currentOffset: monitor.getSourceClientOffset(),
    isDragging: monitor.isDragging(),
  }));

  if (!isDragging) {
    return null;
  }

  return (
    <div style={{ position: 'fixed', pointerEvents: 'none', left: currentOffset.x, top: currentOffset.y }}>
      Custom Drag Layer Content
    </div>
  );
}

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Package last updated on 19 Apr 2022

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