Getting Started

Install with npm

npm install dragee

Install with yarn

yarn add dragee

Usage

Draggable

import { Draggable } from 'dragee'
new Draggable(element[, options])

Listeners

new Draggable(element, {
    on: {
        'drag:start': () => addClass(element, 'is-dragging')
        'drag:move': () => console.log('drag:move')
        'drag:end': () => removeClass(element, 'is-dragging')
    }
})

bound

bound is function that restrict movements of Draggable. Bounding conception can help us to restrict draggable movements. We can set to move it insite rectangle, by circle, by line, etc. By default we will resctrict movements inside container rectangle

import { BoundToCircle } from 'dragee'

new Draggable(element, {
    bound(point, size) {
        const retPoint = point.clone()
        retPoint.y = calculusFx(point.x)
        return retPoint
    }
})

new Draggable(element, {
    bound: BoundToCircle.bounding(new Dragee.Point(100, 90), 80)
})

Predefined boundings:

BoundToElemen.bounding(element, container)
BoundToRectangle.bounding(rectangle)
BoundTolineX.bounding(x, startY, endY)
BoundTolineY.bounding(y, startX, endX)
BoundToLine.bounding(startPoint, endPoint)
BoundToCircle.bounding(center, radius)
BoundToArc.bounding(center, radius, startAgle, endAngle)

Other Options

| Option | Type | Default | Description | | --- | :---: | :---: | --- | | handler | string/element | null | specifies on what element the drag interaction starts. | | container | element | auto | HTMLElement that define Cartesian coordinates system. It's upper left corner is taken as the origin. By default we calculate container automatically by finding first parentNode that have non static positioning. | | position | Point | auto | Start positioning. By default we automatically calculate position inside container element. | | nativeDragAndDrop | Boolean | false | There can be situations where we need to use html5 drag&drop instead of dragee realization. Example: table>tr have a lot of issues, so it's easier to fix them using html5 drag&drop realization or emulation. | | emulateNativeDragAndDropOnTouch | Boolean | true | Emulate native drag&drop on touch devices. |

List

During dragging we search nearest Draggable from list and if distance between them is less than radius, we excange their positions

Dragee.List(draggables[, options])

Example:

<ul id="listA" class="list">
    <li>↔ A</li>
    <li>↔ B</li>
    ...
    <li>↔ Z</li>
</ul>

const container = document.getElementById("listA")
const elements = [...container.querySelectorAll("li")]
const draggables = elements.map((element) => new Draggable(element, { container })

new List(draggables)

Options:

getDistance

Function that calculate distance from one draggable to other. We already implemented getDistance, getXDifference and getYDifference functions. By default we use getDistance function.

import { getYDifference, List } from 'dragee'

new List(draggables, {
    getDistance: getYDifference
})

new List(draggables, {
    getDistance: (p1, p2) => Math.abs(p1.x - p2.x)
})

sorting

By default we sort by y value. If it's equal, then by x. But it's possible to customize this behaviour

radius

radius that determine if we can excange two Draggable. Default: 30px

timeEnd

time to move draggable to endpoint Default: 200ms

timeExcange

time to exchange two draggables Default: 400ms