OnBeforeDelete

Source on GitHub

The OnBeforeDelete type is a callback function that is called before nodes or edges are deleted. It can prevent deletion or modify the items to be deleted by returning false or a modified set of nodes and edges.


type OnBeforeDelete<
  NodeType extends NodeBase = NodeBase,
  EdgeType extends EdgeBase = EdgeBase,
> = ({
  nodes,
  edges,
}: {
  nodes: NodeType[];
  edges: EdgeType[];
}) => Promise<boolean | { nodes: NodeType[]; edges: EdgeType[] }>;

Parameters:

Name	Type	Default
`__0`	`{ nodes: NodeType[]; edges: EdgeType[]; }`

Returns:

Promise<boolean | { nodes: NodeType[]; edges: EdgeType[]; }>