I have been having difficulty grasping the distinction between these two ideas within the framework.
I am quite experienced with directives in AngularJS 1.x, and both components and directives in Angular 2 appear to be closely related to this concept...
Every Component in Angular can be thought of as a Directive with its own View.
Because only components have views, this has several consequences, such as:
directives for use within the component and its entire subtree.pipes for use within the component and its entire subtree.viewEncapsulation since they possess views, unlike directives.ElementInjector for a specific component, it is designated as a Host injector.In Angular 2, the traditional approach to defining a component looks like this:
@Component({
selector: '...',
// ...
})
@View({
template: '...'
})
class ComponentCtrl {...}
The @View decorator allows you to define a view for a particular component. Originally, it was separated into a distinct decorator (similar to the example above) because the Angular team intended to enable a single component to have multiple view definitions (one for each platform on which the component would operate).
However, this decorator has since been removed, so now you can define a component using the following syntax:
@Component({
selector: '...',
template: '...',
//...
})
class ComponentCtrl {...}
This method produces the same outcome but requires less typing. Angular 2 internally adds the necessary view metadata based on the properties set in the @Component decorator.
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