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Dragee - drag&drop library for desktop and mobile apps

dragee 최신버젼 다운로드

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# Dragee

[![npm version](https://badge.fury.io/js/dragee.svg)](https://badge.fury.io/js/dragee)

A lightweight, dependency-free JavaScript library for drag and drop, sortable lists, and target-based interactions.

[Full Documentation](https://dragee.github.io/)

## Installation

```bash
npm install dragee
```

## Core Components

### Draggable

The base class for making elements draggable.

```javascript
import { Draggable, Point } from 'dragee';

const element = document.getElementById('draggable');
const calculusFx = (x) => {
  x = x / 100;
  return (x * Math.sin(x * x) + 1) * 10 + 80;
};

const draggable = new Draggable(element, {
  bound: (point, size) => {
    const retPoint = point.clone();
    retPoint.y = calculusFx(point.x);
    return retPoint;
  },
  position: new Point(210, calculusFx(210))
});

// Events
draggable.on('drag:start', () => console.log('Started dragging'));
draggable.on('drag:move', () => console.log('Dragging'));
draggable.on('drag:end', () => console.log('Finished dragging'));
```

![Draggable Bounding Demo](https://user-images.githubusercontent.com/244409/68145781-36dd3500-ff3f-11e9-8ab2-5f0d22b1d448.png)

#### Common options

| Option | Type | Default | Description |
| --- | --- | --- | --- |
| `container` | `Element` | `element.offsetParent` | Coordinate space for position calculations |
| `position` | `Point` | current `offset` | Initial position |
| `bound` / `bounding` | `(point, size) => Point` \| `Bound` | identity | Movement constraint |
| `handler` | `Element` \| `string` | `element` | Sub-element (or selector) that starts the drag |
| `dragStartThreshold` | `number` | `0` | Pixels the pointer must travel before drag activates. Prevents accidental drags when the user just wants to click |
| `shouldRemoveZeroTranslate` | `boolean` | `false` | Remove `translate3d(0,0,0)` from the inline `transform` when resting |
| `nativeDragAndDrop` | `boolean` | `false` | Use HTML5 drag-and-drop events instead of mouse/touch |
| `emulateNativeDragAndDropOnTouch` | `boolean` | `false` | On touch devices, emulate native drag-and-drop |
| `stopPropagationOnDragStart` | `boolean` | `false` | Stop event propagation on drag start |

### Predefined Bounding Functions

Dragee provides several predefined bounding functions to constrain draggable movement:

```javascript
// Bound to element's boundaries
BoundToElement.bounding(element, container)

// Bound to specific rectangle
BoundToRectangle.bounding(rectangle)

// Bound to vertical line with Y-axis constraints
BoundToLineX.bounding(x, startY, endY)

// Bound to horizontal line with X-axis constraints
BoundToLineY.bounding(y, startX, endX)

// Bound to line between two points
BoundToLine.bounding(startPoint, endPoint)

// Bound to circle
BoundToCircle.bounding(center, radius)

// Bound to arc
BoundToArc.bounding(center, radius, startAngle, endAngle)
```

### Sortable

Two types of sortable lists are available:

#### List
Basic sortable list implementation.

```javascript
import { Draggable, List } from 'dragee';

const gridContainer = document.querySelector('.grid-container');
const gridItems = gridContainer.querySelectorAll('.grid-item');

const gridDraggables = Array.from(gridItems).map(item =>
  new Draggable(item, {
    container: gridContainer,
    nativeDragAndDrop: true
  })
);

new List(gridDraggables)
```

#### BubblingList
Vertical sortable list that uses bubbling algorithm for smooth and natural sorting behavior.

```javascript
import { Draggable, BubblingList } from 'dragee';

const listContainer = document.querySelector('.sortable-demo-list');
const listItems = listContainer.querySelectorAll('.items');

const draggableItems = Array.from(listItems).map((item) =>
  new Draggable(item, {
    container: listContainer,
    nativeDragAndDrop: true,
    emulateNativeDragAndDropOnTouch: true
  })
);

new BubblingList(draggableItems);
```

![Sotrable BubblingList Demo](https://github.com/user-attachments/assets/29d6eb14-485e-44e4-bf04-9f6f3ffe2609)

### Targets

Target areas for draggable elements.

```javascript
import { Target, FloatLeftStrategy, transformedSpaceDistanceFactory } from 'dragee';

const target = new Target(element, draggables, {
  timeEnd: 200,
  timeExcange: 400,
  container: parentElement,
  strategy: new FloatLeftStrategy(
    () => target.getRectangle(),
    {
      radius: 80,
      getDistance: transformedSpaceDistanceFactory({ x: 1, y: 4 }),
      removable: true
    }
  )
});
```

### Target Strategies

#### FloatLeftStrategy
Orders draggables from top to bottom, positioning them on the left side of the target area.

```javascript
new Target(element, draggables, {
  strategy: new FloatLeftStrategy(
    () => target.getRectangle(),
    {
      radius: 80,
      getDistance: transformedSpaceDistanceFactory({ x: 1, y: 4 })
    }
  )
});
```

#### FloatRightStrategy
Orders draggables from top to bottom, positioning them on the right side of the target area.

```javascript
new Target(element, draggables, {
  strategy: new FloatRightStrategy(
    () => target.getRectangle(),
    {
      radius: 80,
      getDistance: transformedSpaceDistanceFactory({ x: 1, y: 4 })
    }
  )
});
```

#### NotCrossingStrategy
A free-form positioning strategy that prevents draggables from overlapping. Items can be placed anywhere within the target area but will maintain their own space without intersecting with other items.

```javascript
new Target(element, draggables, {
  strategy: new NotCrossingStrategy(
    () => target.getRectangle()
  )
});
```

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