Core currently emits a created event in the ViewBase constructor, however this is not used within core, and using it in user code is not all that useful either because it's emitted before you get a chance to add a listener, so essentially you can't directly listen to the created event on a view. The only way to listen to it is through global listeners, ie.:

Observable.on('created', (args) => {
 console.log('created', args.object)
})

Since this fires in the constructor, you don't have access to the view id, only the _domId.

https://github.com/NativeScript/NativeScript/blob/8d25d251cd1c311d3f73e526bf2fd4ee0b2be0b8/packages/core/ui/core/view-base/index.ts#L472

Proposal: remove this event from core, it seems useless and only adds a slight overhead to all view creation.

If you know a valid use-case for why we should keep this, please comment here!

/cc @NativeScript/tsc