In this article, we are going to discuss different ways to use routing to render different components
Prerequisites
· Node Js
· Angular
· VS Code
Agenda
· What is Angular?
· What is Routing?
· Benefits of Routing
· Routing in Angular
What is Angular?
Angular is a widely-used open-source JavaScript framework for building web applications, developed and maintained by Google’s Angular Team. It enables developers to create dynamic single-page applications (SPAs) and offers a structured, efficient approach for building complex web applications.
What is Routing?
Routing in web development determines how an application responds to specific URLs or paths by mapping them to components or views, rendering appropriate content based on the requested route.
In client-side applications like Angular single-page applications (SPAs), routing allows seamless navigation between views without reloading a new HTML page from the server. Instead, the app dynamically updates content by loading only the components and data required for each route.
Benefits of Routing
Routing enhances web applications by offering several key advantages:
Improved User Experience: Routing creates a smooth, interactive experience by enabling users to navigate between views without full page reloads.
Faster Page Transitions: Only the necessary components and data for each route are loaded, reducing page transition times.
Modularity and Maintainability: Routing supports a modular structure, separating the application into distinct components for each route. This promotes reusability, separation of concerns, and ease of maintenance, making it simpler to manage and update sections independently.
Conditional Rendering and Dynamic Content: Routing allows components to render conditionally based on the route, enabling tailored content display according to the user's path.
Route and Query Parameters: Routes can carry dynamic parameters (like IDs or usernames) and query parameters, allowing for data filtering, sorting, and more within URLs.
Route Guards and Security: Angular routing includes route guards to control access based on conditions such as authentication and authorization, securing the app by ensuring that users meet necessary criteria before accessing routes.
Nested Routes: Nested routes enable a hierarchical navigation structure, useful for complex applications with multi-level navigation, allowing each section to be managed independently.
Routing in Angular
In client-side web applications like Angular single-page applications (SPAs), routing enables seamless navigation between views without reloading a new HTML page from the server. Instead, the app dynamically updates content in the browser by loading only the necessary components and data based on the requested route.
Angular routing involves several key components:
Routes: Routes map URL paths to corresponding components. Each route is defined by a URL path and the component to render when that path is accessed.
Router: The router interprets the current URL and loads the appropriate components based on the defined routes. It listens for URL changes and handles in-app navigation.
Router Outlet: This placeholder in the application’s template displays the content of the current route.
Router Links and Navigation: Navigation elements, such as anchor tags or buttons, use Angular's
routerLinkdirective to trigger navigation to different routes, specifying the target route for smooth transitions within the app.
Routing example in Angular
Step 1
Install NodeJS.
Step 2
Install Angular CLI using the following command.
npm install -g @angular/cli
Step 3
Verify NodeJS and Angular CLI are installed or not using the following commands:
node — version
ng version
Create a new Angular Application.
ng new RoutingDemo
Step 4
Open the Angular application in one of the editors, like VS Code, and install the bootstrap with the help of the following command:
npm install bootstrap
next, add the bootstrap script inside the angular.json file inside the scripts and styles section
angular.json
Step 5
Open your terminal or command prompt and navigate to your Angular project directory. Run the following commands to generate the components:
ng generate component home
ng generate component about
ng generate component contact
ng generate component feedback
ng generate component product
ng generate component product-offer
ng generate component product-updates
ng generate component rating
Step 6
Routing Configuration:
Open the app-routing.module.ts file in your project and update the route configuration to include the newly created components.
This configuration maps the respective paths to their corresponding components.
In Angular, the RouterModule and Routes are key components used for configuring and managing routing in an application.
RouterModule:
The RouterModule is an Angular module that provides the necessary directives, services, and functionality for implementing routing in an application.
Routes:
Routes is an array that defines the routes and their configurations within the application. Each route object within the Routes array specifies the URL path and the corresponding component to be rendered when that path is accessed.
components RatingComponent and FeedbackComponent nested under the AboutComponent, with named outlets for rating and feedback, you can modify the routing configuration in Angular as follows:
Update the Routes array in your routing module (e.g., app-routing.module.ts) to include the child routes under the AboutComponent with named outlets:
In this updated example, we’ve added child routes to the AboutComponent and specified the named outlet's rate and feed for the RatingComponent and FeedbackComponent, respectively.
Conclusion
In this article, we discussed routing, its benefits in Angular, and step-by-step implementation after creating different components in Angular 18.
Happy Coding!
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