Use LoadStarted.
The same emitter under the old binding name, so a template still binding (loadStarted) keeps working. Must stay AFTER LoadStarted: class fields initialise in order, and the other way round this captures undefined.
Use QueryId.
A callback method that is invoked immediately after the default change detector has checked the directive's data-bound properties for the first time, and before any of the view or content children have been checked. It is invoked only once when the directive is instantiated.
Deprecated
Use LoadComplete.
The same emitter under the old binding name, so a template still binding (loadComplete) keeps working. Must stay AFTER LoadComplete: class fields initialise in order, and the other way round this captures undefined.