Routing in Angular

Routing in Angular is a crucial aspect of building single-page applications (SPAs) that enable navigation between different views or components without full page reloads. Here's a basic rundown:

Setting Up Routes:

  1. Import Routes and RouterModule: In your Angular app module file (app.module.ts), import Routes and RouterModule from @angular/router.
  2. Define Routes: Create an array of route objects where each route specifies a path and the component it should display. For example:

                        const routes: Routes = [
                        { path: '', redirectTo: '/home', pathMatch: 'full' }, // Default route
                        { path: 'home', component: HomeComponent },
                        { path: 'about', component: AboutComponent },
                        // Add more routes as needed

  3. Configure RouterModule: Use RouterModule.forRoot() to configure the routes in your app module's imports array:

                            imports: [
                              // Other module imports
                            // Other configurations

Using Router Outlet

In your main template file (app.component.html by default), include the tag. This is where Angular will render the component associated with the current route.



  • RouterLink Directive: Use the routerLink directive in your templates to navigate to different routes. For example:

                        <a routerLink="/home">Home</a>
                        <a routerLink="/about">About</a>                    

  • Programmatic Navigation: In your component classes, you can use the Router service to navigate programmatically:

                        import { Router } from '@angular/router';
                        constructor(private router: Router) {}
                        goToAboutPage() {

Route Parameters

You can define routes with parameters to handle dynamic data. For example:

            { path: 'users/:id', component: UserComponent }

And in your component, access the parameter using ActivatedRoute:

            import { ActivatedRoute } from '@angular/router';

            constructor(private route: ActivatedRoute) {
              this.route.params.subscribe(params => {
                const userId = params['id'];
                // Use userId to fetch user data or perform actions

Route Guards

You can implement guards to control access to certain routes based on conditions (e.g., authentication) using CanActivate, CanActivateChild, CanDeactivate, etc.

Angular's routing system provides a lot of flexibility and power in managing navigation within your application, allowing for both simple and complex navigation structures.

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