Forked from douglaslise/native_js_drag_and_drop_helper.js
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March 29, 2022 17:56
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Create the `simulateDragDrop` function which can be used to simulate clicking and dragging one DOM Node onto another
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function simulateDragDrop(sourceNode, destinationNode) { | |
var EVENT_TYPES = { | |
DRAG_START: 'dragstart', | |
MOUSEOVER: 'mouseover', | |
DROP: 'drop', | |
DRAG_END: 'dragend' | |
} | |
function createCustomEvent(type) { | |
var event = document.createEvent('CustomEvent') | |
event.initCustomEvent(type, true, true, null) | |
event.dataTransfer = { | |
data: { | |
}, | |
setData: function(type, val) { | |
this.data[type] = val | |
}, | |
getData: function(type) { | |
return this.data[type] | |
} | |
} | |
return event | |
} | |
function dispatchEvent(node, type, event) { | |
if (node.dispatchEvent) { | |
return node.dispatchEvent(event) | |
} | |
if (node.fireEvent) { | |
return node.fireEvent('on' + type, event) | |
} | |
} | |
var event = createCustomEvent(EVENT_TYPES.DRAG_START) | |
dispatchEvent(sourceNode, EVENT_TYPES.DRAG_START, event) | |
var mouseoverEvent = document.createEvent('MouseEvent'); | |
mouseoverEvent.initMouseEvent(EVENT_TYPES.MOUSEOVER, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null) | |
dispatchEvent(destinationNode, EVENT_TYPES.MOUSEOVER, mouseoverEvent) | |
var dropEvent = createCustomEvent(EVENT_TYPES.DROP) | |
dropEvent.dataTransfer = event.dataTransfer | |
dispatchEvent(destinationNode, EVENT_TYPES.DROP, dropEvent) | |
var dragEndEvent = createCustomEvent(EVENT_TYPES.DRAG_END) | |
dragEndEvent.dataTransfer = event.dataTransfer | |
dispatchEvent(sourceNode, EVENT_TYPES.DRAG_END, dragEndEvent) | |
} |
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Forked from https://gist.github.com/douglaslise/884692bb54cdf8e76702c01bc18defbd, added simulation of mouseover event after drag event to avoid errors thrown by DnD JS libraries.
For example, https://github.com/react-dnd/react-dnd/ throws the following error