A function to run before an edge of the given type is dragged from the given source. Returning false from
this method will abort the connection.
Type declaration
(source, type): boolean | Record<string, any>
Parameters
source: Vertex
type: string
Returns boolean | Record<string, any>
Returns
If you return boolean false from this method the connection is aborted. If you return an object from this method it will
be used as the initial data for the resulting edge.
A function to run before an edge of the given type is dragged from the given source. Returning false from this method will abort the connection.