A simple drag and drop library for React which uses the more stable mouseDown/mouseUp pattern instead of the problematic HTML5 drag and drop API.
Drag and drop interfaces are complicated and difficult to properly program, this package attempts to alleviate some of the common hangups with drag and drop libraries. It should be noted that there are more mature solutions available such as the excellent react-dnd package, however for many simple drag and drop applications, the implementation of such packages can quickly become arduous.
- Warning, version 2 represents a significant rewrite of version 1 of
react-dragtastic
. The API is completely different, but with the changes come several stability improvements, primitive mobile support, and significantly increased render flexibility. Be sure you're ready to rewrite your drag-and-drop implementation before upgrading from version 1.
Demo Site More examples coming soon
npm install --save react-dragtastic
or
yarn add react-dragtastic
import {
Draggable,
Droppable,
DragComponent,
DragState
} from 'react-dragtastic'
var dnd = require('react-dragtastic')
var Draggable = dnd.Draggable
var Droppable = dnd.Droppable
var DragComponent = dnd.DragComponent
react-dragtastic
makes use of three different components, a <Draggable/>
component which defines a zone on a page which can then trigger drag events, a <Droppable/>
component, which defines zones which trigger drop events, and a <DragComponent/>
component which defines the component that follows the user's pointer around the page while dragging.
react-dragtastic
uses the "function-as-child" component pattern to give you full control over the rendering details of each component.
This defines a draggable zone. At a minimum, spread the events over the element that should be draggable (usually the root element).
id
: An id which will be used in the draggable zone's target<DragComponent/>
type
: A string, or array of strings, used to limit which droppable zones will accept<DragComponent/>
's attached to this draggable.data
: Data of any type which will be passed to theonDrop
function of any<Droppable/>
which accepts this<Draggable/>
's type.onDragStart
: A function which will be called when the<Draggable/>
zone is activated (The user started dragging).onDragEnd
: A function which will be called when the<Draggable/>
zone is deactivated (The user stopped dragging).onDrag
: A function which will be called every time the user's cursor moves while dragging.delay
: An optional int representing the distance in pixels the user's pointer must travel to activate the draggable. Defaults to8
class DraggableZone extends React.Component {
render() {
return (
<Draggable id="unique-id" type="apple">
{dragState => <div {...dragState.events}>I'm a draggable zone</div>}
</Draggable>
)
}
}
This defines a droppable zone. At a minimum, spread the events over the element that should be droppable (usually the root element).
accepts
: A string type corresponding to thetype
property of the<Draggable/>
zone for which this<Droppable/>
should accept drop events.onDrop
: A function which will be called when a user drops a<DragComponent/>
on this<Droppable/>
with an accepted type.onDragEnter
: A function which will be called when the user's cursor enters the<Droppable/>
while dragging. This function will be called regardless of whether the droppable accepts the draggable currently being dragged.onDragLeave
: A function which will be called when the user's cursor leaves the<Droppable/>
while dragging. This function will be called regardless of whether the droppable accepts the draggable currently being dragged.
Properties available from dragState
:
- All the properties listed in the dragState section.
isOver
: a boolean representing whether the user is currently hovering the<Droppable/>
class DroppableZone extends React.Component {
render() {
return (
<Droppable accepts="apple">
{dragState => <div {...dragState.events}>I'm a droppable zone</div>}
</Droppable>
)
}
}
By default, children passed to this component will only render if the user is currently dragging, but this can be overridden.
for
: A string corresponding to theid
property of the<Draggable/>
zone that should trigger this component to start rendering.onDrag
: A function which will be called every time a user drags.alwaysRender
: A boolean determining whether or not the DragComponent should always render. Defaults tofalse
.
Properties available from dragState
:
- All the properties listed in the dragState section.
isOverAccepted
: a boolean representing whether the user is currently hovering a<Droppable/>
that accepts thetype
of the currently active<Draggable/>
class DragComponentWrapper extends React.Component {
render() {
return (
<DragComponent for="unique-id">
{dragState => (
<div
style={{
position: 'fixed',
left: dragState.x,
top: dragState.y,
pointerEvents: 'none'
}}
>
I will render when my Draggable zone is activated
</div>
)}
</DragComponent>
)
}
}
All components imported from react-dragtastic
have access the global dragState with the following properties:
x
: The user's current horizontal position on the page.y
: The user's current vertical position on the page.startingX
: The user's initial horizontal position on the page when they started dragging.startingy
: The user's initial vertical position on the page when they started dragging.isDragging
: A boolean representing whether the user is currently dragging.currentlyDraggingId
: The id of the currently dragging element.currentlyHoveredDroppableId
: The id of the<Droppable/>
currently being hovered.currentlyHoveredDroppableAccepts
: Theaccepts
property of the<Droppable/>
currently being hovered.data
: Data from thedata
property of the<Draggable/>
which is currently active.null
if not dragging.type
: The type of the component being currently dragged.null
if not dragging.
Occasionally you may need to notify a component about changes in the dragging state without making that component a draggable or droppable zone. For these cases there is a fourth component available called <DragState/>
. This component is used just like a draggable or droppable, but does not accept or trigger any drag events.
class CompWithDragState extends React.Component {
render() {
return (
<DragState>
{dragState => (
<div style={{ background: dragState.isDragging ? 'red' : 'blue' }}>
I always render, and have access to the global dragState.
</div>
)}
</DragState>
)
}
}
- You most likely need to set
pointer-events: none
in the css of yourDragComponent
. This allows droppables to receive drop events when the user's pointer is directly on top of the DragComponent as it is being dragged. This property is well supported.
- A project website with live examples.
- Screencast showing basic implementation examples.
- Improved mobile support.
- Additional event hooks
Contributions of any kind are welcome. Please feel free to file issues, submit pull-requests, or drop us a line with feature requests.