Component in Angular

Components are one of the most important building blocks in Angular. They are the core of the Angular framework and are used to build the user interface of an application. A component is basically a TypeScript class that is decorated with the @Component decorator, which provides metadata about the component to Angular.

Components have a template that describes how the component should be rendered in the DOM. The template can be either inline or external. Inline templates are defined directly in the component’s TypeScript file using the template property, while external templates are stored in a separate HTML file and linked to the component using the templateUrl property.

Here is an example of a simple component in Angular:

import { Component } from '@angular/core';

@Component({
  selector: 'app-my-component',
  template: `
    <h2>Hello, World!</h2>
  `
})
export class MyComponent {}

In this example, we have defined a component called MyComponent that has a selector of ‘app-my-component’ and a template that displays a heading tag with the text ‘Hello, World!’. This component can now be used in other templates by including its selector as a custom HTML tag.

Components can also have inputs and outputs that allow them to communicate with other components. Inputs are used to pass data into a component, while outputs are used to emit events out of a component. This makes it easy to create reusable and modular components that can be easily integrated into different parts of an application.

Overall, components play a crucial role in Angular development and are essential for building dynamic and interactive user interfaces. By understanding how components work and how to create and use them effectively, developers can create powerful and flexible applications with Angular.