How to Create and Use Your Own Components in Angular
A component is one of the most important building blocks of an Angular application. Components are reusable bits of code that make up certain sections of your website.
Examples of components you’re able to create include smaller UI elements such as buttons or cards. They can also include larger UI elements such as sidebars, navigation bars, or whole pages.
Using Components in Angular
When you create components in an Angular application, you can use them within other components. For example, you could create a component for a large UI card element. You can then use this component as a regular HTML tag, anywhere you like:
Since components are reusable bits of code, you can also pass variables so that the data for each instance is different. You can also create components for pages, and you can route to them accordingly using theapp-routing.module.tsfile.
You can design your components based on the structure of your application, and how much you want to separate your functionality.
How to Create a Component
You can use thenggenerate commandto create a new component.
How to Add Content to the Angular Component
Angular creates each component with an HTML, CSS, TypeScript, and Testing Specification file.
Add some content to the custom ui-card component.
How to Use the Component in the HTML of Another Component
Insideui-card.component.ts, there are three attributes: selector, templateUrl, and styleUrl. The templateUrl refers to the HTML of the component (and therefore links to the HTML file). The styleUrls attribute refers to the CSS of the component and links to the CSS file.
When you use the UI Card component in another component, you will use the “app-ui-card” selector name.
How to Pass Input Parameters Into the Component
Since the component is re-usable, there are attributes that you may want to change every time you use it. In this case, you could use input parameters.
You might see an error at this point about these properties having no initializer. If so, just add or set"strictPropertyInitialization": falsein yourtsconfig.json.
How to Route to a New Component
If your component is representing a large part of your website such as a new page, then you can also route to that component.
Creating Components in Angular
A component is one of the major building blocks of Angular. Components allow you to break up different sections of your website into smaller, reusable parts. You can make anything into components, including smaller buttons, cards, larger sidebars, and navigation bars.
you’re able to also use input variables to pass data across different instances of the component. And you can route to the component using URL paths.
If you’re developing a new Angular app, you may need to build a navigation bar for your users to navigate through your components. Having a responsive nav bar allows you to view it on different devices, across different screen sizes.
Calling all beginner web devs: this tutorial will give you the skills you need to create your own responsive navbars using just HTML and CSS!
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