Component

In Angular 2, Components are the main way we build and specify elements and logic on the page.

In Angular 1, we achieved this through directives, controllers, and scope. In Angular 2, all those concepts are combined into Components.

To build an Angular 2 application you define a set of components, for every UI element, screen, and route. An application will always have a root component that contains all other components. In other words, every Angular 2 application will have a component tree, which may look like this:

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LET US SEE A SIMPLE COMPONENT