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Overview
With Google’s Angular framework, developers can create dynamic single-page applications (SPAs) quickly and effectively. The routing system of Angular is one of its primary features, which enables developers to switch between views with ease. To improve your comprehension, we’ll go into dynamic routing, review the foundations of Angular 12 routing, and answer some often-asked questions in this blog article.
Introduction
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Angular 12 Routing Fundamentals
- Setting Up Routes
Angular applications define routes using the RouterModule
and its forRoot
method. In your main application module, typically named app.module.ts
, import the necessary modules:
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```typescript import { RouterModule, Routes } from '@angular/router'; ``` |
- Define your routes as an array of
Route
objects:
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```typescript const routes: Routes = [ { path: '', component: HomeComponent }, { path: 'about', component: AboutComponent }, { path: 'contact', component: ContactComponent }, ]; |
- Integrating Router Module
Next, integrate the RouterModule
into your application by importing and configuring it within the imports
array of the @NgModule
decorator:
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```typescript @NgModule({ declarations: [ // Components ], imports: [ // Other modules RouterModule.forRoot(routes), ], bootstrap: [AppComponent], }) export class AppModule {} ``` |
- Displaying Views with Router Outlet
To display the routed components, use the <router-outlet></router-outlet>
directive in your main template (usually app.component.html
):
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```html <!-- app.component.html --> <div> <router-outlet></router-outlet> </div> ``` |
- Navigating Between Routes
Angular provides multiple ways to navigate between routes:
Imperative Navigation:
In your component, use the Router
service to navigate programmatically:
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```typescript import { Router } from '@angular/router'; // ... constructor(private router: Router) {} navigateToAbout() { this.router.navigate(['/about']); } ``` |
Declarative Navigation:
Use the routerLink
directive in your templates for declarative navigation:
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```html <!-- app.component.html --> <a routerLink="/">Home</a> <a routerLink="/about">About</a> <a routerLink="/contact">Contact</a> ``` |
Dynamic Routing
Dynamic routing in Angular allows for more flexible and data-driven navigation. This is particularly useful when loading components based on dynamic data or parameters.
Configuring Dynamic Routes
Dynamic routes involve using route parameters to influence the displayed content. Modify your routes to include the parameters:
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```typescript const routes: Routes = [ { path: '', component: HomeComponent }, { path: 'about/:id', component: AboutDetailComponent }, { path: 'contact', component: ContactComponent }, ]; ``` |
In this example, the :id
in the route indicates a parameter that can be passed when navigating to the ‘about’ route.
Accessing Route Parameters
To access route parameters, inject the ActivatedRoute
service in your component:
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```typescript import { ActivatedRoute } from '@angular/router'; // ... constructor(private route: ActivatedRoute) { this.route.params.subscribe(params => { console.log(params.id); }); } ``` |
Dynamically Loading Components
With dynamic routing, you can dynamically load components based on route parameters. In the example above, the AboutDetailComponent
can use the route parameter to fetch specific data or content.
Conclusion
Angular 12 routing is a powerful feature that enables developers to create sophisticated and dynamic SPAs. Mastering both the fundamentals and dynamic aspects of routing opens up endless possibilities for crafting engaging user experiences.
Drop a query if you have any questions regarding Angular 12 and we will get back to you quickly.
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FAQs
1. What is the purpose of the `RouterModule.forRoot` method?
ANS: – The forRoot
method configures the router with the provided routes. It should be called only once in the main application module. The forRoot
method sets up the router with initial navigation based on the current browser URL.
2. How can I navigate programmatically in Angular 12?
ANS: – Use the Router
service and its navigate
method for imperative navigation. For example, this.router.navigate([‘/about’]);
will navigate to the ‘about’ route.
3. Can I have multiple `router-outlet` directives in my application?
ANS: – Yes, you can. Multiple router-outlet
directives allow you to have named outlets, enabling the display of different components in different parts of your application.
WRITTEN BY Huda Khan
Huda is working as the Front-end Developer in Cloudthat Technologies. She is experienced in building and maintaining responsive websites. She is keen on learning about new and emerging technologies. In addition to her technical skills, she is a highly motivated and dedicated professional, committed to delivering high quality work.
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