onChildAdd MethodProtected Static @beta

Called when an existing element is about to be updated so that an instance of this class will become its new parent.

onChildAdd(_arg: OnChildElementPropsArg): void

@note throw an exception if the element should not be added

@note this is the class of the prospective parent Element.

Returns - void

Defined in

• core/backend/src/Element.ts Line 258