Angular Components

1. Angular Basics

2. Components
 InAngular, a component is a basic building block of the application. It is responsible for
rendering a piece of the user interface (UI) and handling user interactions.Components are the
main way to break up anAngular application into smaller parts, making the code more
maintainable and easier to understand.
 It is a self-contained unit that encapsulates both the view (template) and the logic (controller) of
the application. Each component in Angular represents a specific part of the user interface, such
as a header, footer, or main content area.

3. Components
Here are the main components of an Angular component:
 Template: The template is the HTML code that defines the component's view. It specifies how the component
should be displayed in the user interface.The template defines the HTML structure for the component's view. It
contains the HTML tags, bindings, and directives.
 Controller: The controller is aTypeScript class that provides the component's logic. It handles the component's
data and behavior and communicates with the view through the template.The component class is linked to the
template through a decorator, @Component, and implements the component's logic.
 Metadata: Metadata is information about the component that Angular uses to configure the component and its
behavior. For example, the @Component decorator is a piece of metadata that providesAngular with information
about the component, such as its selector, template, and styles.

4. Components
 Modules: Modules are collections of related components and services that can be organized and
managed together. An Angular application can have one or more modules, and each module can
have its own components, services, and directives.
Services: Services are classes that provide shared functionality and data across the components in
an Angular application.Components can use services to access common data and functionality,
reducing the amount of duplicated code in the application.
 Directives: Directives are attributes or components that add custom behavior to an HTML element.
Angular provides a number of built-in directives, such as *ngFor and *ngIf, which allow you to add
dynamic behavior to your components.

5. Components
 Metadata: Metadata is information about the component that
Angular uses to configure the component and its behavior. For
example, the @Component decorator is a piece of metadata
that provides Angular with information about the component,
such as its selector, template, and styles.
The component's template, class, and metadata work together to
define the component's behavior and appearance. The component
class uses data binding to update the component's view, and the
component's view updates the component's data in response to
user actions.

6. Components Metadata
InAngular, a component's metadata is defined using the @Component decorator, which is a special
function that adds metadata to the component class.The metadata includes information such as the
selector, template, styles, and other properties that determine the component's behavior and appearance.
Here are some of the most commonly used properties in the @Component decorator:
selector: A string that defines the HTML tag that represents the component in the template.
template:A string or a reference to an HTML file that defines the component's UI.
styles:An array of strings or references to CSS files that define the component's styles.
 animations:An array of animation definitions for the component.
encapsulation: A property that determines how styles are scoped to the component.
providers: An array of services that can be injected into the component.

7. Components Metadata
 inputs:An array of properties that can be passed from the parent component to the child component.
 outputs: An array of event emitters that allow the component to communicate with the parent
component.
The metadata provides Angular with the information it needs to render and manage the component, and it
can be customized to change the component's behavior and appearance as needed.

8. Questions ?

9. Thank You