Router Lifecycle event NavigationError in Angular | Angular tutorial in Hindi (Session-229)

Описание: Router Lifecycle event NavigationError in Angular | Angular tutorial in Hindi (Session-229)

In this Angular session, learn everything about the NavigationError event — the Router Lifecycle event that fires when Angular navigation fails due to unexpected errors such as resolver failures, guard exceptions, API errors, or runtime issues in route loading. This event is extremely important for debugging broken routes, failed navigations, and understanding error handling in Angular routing.

What You’ll Learn in This Video:

1.What is NavigationError event in Angular
2.When NavigationError is triggered in Router Lifecycle
3.Common reasons why Angular throws a navigation error
4.How to subscribe to NavigationError event
5.Use cases of NavigationError in real Angular apps
6.Difference between NavigationError, NavigationCancel & NavigationEnd
7.Best practices for handling NavigationError in Angular

Concept Breakdown:

🔹 Navigation Failure: NavigationError fires when Angular hits an unexpected error during route navigation.
🔹 Resolver Errors: API failures or thrown errors inside resolvers can break navigation.
🔹 Guard Exceptions: Unexpected errors inside guards can lead to navigation failure.
🔹 Module Loading Issues: Errors in lazy-loaded modules, missing components, or misconfigured routes trigger NavigationError.
🔹 Event Payload: Provides navigation ID, target URL, and the actual error object for debugging.
🔹 Debugging Tool: Helps identify broken routes, missing files, and runtime exceptions during navigation.

FAQs (NavigationError Event in Angular)

Q1: What is NavigationError event in Angular?
Q2: When does NavigationError fire in the router lifecycle?
Q3: What causes NavigationError in Angular routing?
Q4: How do I listen to the NavigationError event?
Q5: What are the common use cases of NavigationError in Angular applications?

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