As an example:

If A user draws a true link from a decision node to a destination node, I want to prevent the user from drawing a false link to the same destination node.


The following code doesn't remove the new link. The tag contains an ID number.

function onLinkCreated(sender, args) {
let linkCount = 0;
let createdLink = args.getLink();
let tempShapeName = createdLink.getOrigin().getShape().getId();
if ( tempShapeName === "Decision" )
{
let newDest = createdLink.getDestination();
let newDestTag = newDest.getTag();
let selLinks = createdLink.getOrigin().getOutgoingLinks();
for (var i = 0; i < selLinks.length; i++) {
let checkLink = selLinks[i];
let checkDestTag = checkLink.getDestination().getTag();
if (checkDestTag === newDestTag) {
linkCount = linkCount + 1;
}
}
if (linkCount >1)
{
miFu.diagram.startCompositeOperation();
miFu.diagram.removeItem(createdLink); Also tried (selLinks[1]) same result
miFu.diagram.commitCompositeOperaton();
miFu.diagram.getSelection().clear();
}
}

Thanks!

I got it to work.