Why routing is needed for SPAs in Angular - Challenge Your Understanding

Challenge - 5 Problems

🧠 Conceptual

intermediate

Why do Single Page Applications (SPAs) need routing?

Consider a Single Page Application (SPA) built with Angular. Why is routing an essential feature in SPAs?

A Routing automatically refreshes the browser cache to improve performance.

B Routing is used to reload the entire page every time the user clicks a link to ensure fresh data.

C Routing allows the SPA to change views without reloading the entire page, providing a smooth user experience.

D Routing disables navigation between different parts of the SPA to keep the user on one page.

💡 Hint

Think about how SPAs update content without full page reloads.

Routing in SPAs manages navigation between different views or components without reloading the whole page. This keeps the app fast and responsive.

❓ component_behavior

intermediate

What happens when Angular SPA uses routing to navigate?

In an Angular SPA, what is the behavior when a user clicks a link that triggers routing?

Angular

<a routerLink="/dashboard">Dashboard</a>

A Angular intercepts the click, updates the URL, and displays the dashboard component without reloading the page.

B The browser reloads the entire page and fetches the dashboard component from the server.

C Nothing happens because routing is disabled by default in Angular SPAs.

D The browser navigates to a new tab showing the dashboard component.

💡 Hint

Consider how Angular handles navigation internally.

Angular routing intercepts navigation events, updates the URL, and swaps components dynamically without full page reloads.

❓ lifecycle

advanced

How does Angular routing affect component lifecycle?

When navigating between routes in an Angular SPA, what happens to the lifecycle of the components involved?

A Angular reloads the entire page, so lifecycle hooks are not relevant.

B Both old and new components remain active simultaneously without lifecycle changes.

C The new component replaces the old one without triggering any lifecycle hooks.

D The old component is destroyed and the new component is created, triggering their respective lifecycle hooks.

💡 Hint

Think about Angular's component lifecycle hooks like ngOnInit and ngOnDestroy.

When routing changes, Angular destroys the current component and creates the new one, triggering lifecycle hooks accordingly.

📝 Syntax

advanced

Identify the correct Angular routing configuration for SPA navigation

Which routing configuration correctly sets up a route to display HomeComponent at the path '' (root) in Angular?

Angular

const routes = [
  // Your route here
];

A { route: '', component: HomeComponent }

B { path: '', component: HomeComponent }

C { path: '/', component: HomeComponent }

D { path: 'home', component: HomeComponent }

💡 Hint

Check the correct property name for the route path and how to represent the root path.

The correct property for the route path is path. The root path is represented by an empty string ''. Using '/' is incorrect in Angular routing.

🔧 Debug

expert

Why does Angular SPA fail to navigate on route change?

An Angular SPA has routing set up, but clicking links does not change the view or URL. What is the most likely cause?

A The <code>RouterModule</code> was not imported into the application module.

B The Angular CLI version is outdated and does not support routing.

C The components are missing <code>@Component</code> decorators.

D The browser does not support JavaScript.

💡 Hint

Think about what Angular needs to enable routing features.

Without importing RouterModule, Angular does not know how to handle routing, so navigation does not work.