Vue.draggable: How to avoid duplicate when cloning item?

[richard1225]

Iam going to clone A list's item to B List.

But i have to make sure the item in B list is unique, and each item has an id, which i can checkout whether it is duplicated.

Now I cant find any lifecircle about "before Clone"

If i can get your help, i will be very appreciated

Thanks for your patience

[David-Desmaisons]

Try to use move props returns false when beginning a drag corresponding to an element which is in list B