delete elements event

[mtksugi]

Thank you for all your help.

I want an elements count（getElements.value.Length） after delete an element.

I implement this inner onNodesChange, onEdgesChange event, but in onNodesChange, onEdgesChange, getElements returns the elements before deletion.

How do I get elements after deletion?
Thanks.

[bcakmakoglu]

You could use a simple watcher to track the count of your elements.

watch(getElements, (newEls, oldEls) => {
   if (newEls.length !== oldEls.length && newEls.length < oldEls.length) {
      console.log('some element was deleted')
   }
})

[mtksugi]

I see.
Thank you very match.