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Code Issues Releases Wiki Activity

check if dataTransfer is undefined (#3093)

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this prevents an error when dragging elements not by mouse where dataTransfer can be undefined
This commit is contained in:
BurningTreeC 2018-01-20 18:28:10 +01:00 committed by Jeremy Ruston
parent ff6aa0570f
commit 42660b05a7
1 changed files with 3 additions and 0 deletions
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3
core/modules/utils/dom/dragndrop.js
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@ -32,6 +32,9 @@ exports.makeDraggable = function(options) {
// Add event handlers
$tw.utils.addEventListeners(domNode,[
{name: "dragstart", handlerFunction: function(event) {
if(event.dataTransfer === undefined) {
return false;
}
// Collect the tiddlers being dragged
var dragTiddler = options.dragTiddlerFn && options.dragTiddlerFn(),
dragFilter = options.dragFilterFn && options.dragFilterFn(),