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Check for DOM node existence before removing class. (#4696)

Can cause issues if dragstart and dragend actions trigger a refresh.
This commit is contained in:
saqimtiaz
2020-06-11 13:11:56 +02:00
committed by GitHub
parent e01b354f7d
commit 25f8b3f903

View File

@@ -75,7 +75,9 @@ DroppableWidget.prototype.leaveDrag = function(event) {
// Remove highlighting if we're leaving externally. The hacky second condition is to resolve a problem with Firefox whereby there is an erroneous dragenter event if the node being dragged is within the dropzone
if(this.currentlyEntered.length === 0 || (this.currentlyEntered.length === 1 && this.currentlyEntered[0] === $tw.dragInProgress)) {
this.currentlyEntered = [];
$tw.utils.removeClass(this.domNodes[0],"tc-dragover");
if(this.domNodes[0]) {
$tw.utils.removeClass(this.domNodes[0],"tc-dragover");
}
}
};