I don't have experience with Angular, and you haven't specified whether you're talking about Qt or Angular, so I will make some clarifications. In QML one has

I don't have experience with Angular, and you haven't specified whether you're talking about Qt or Angular, so I will make some clarifications. In QML one has QML components, which are JSON syntaxed files that can include other components and Javascript code. A component can be anything from a UI widget to a a camera object that can be used to take pictures, etc. QML encourages model-view programming which is a proven pattern used in the best UI frameworks on pretty much every platform. Nothing magical or limiting about it.