Скачать или смотреть Solving the Angular Route Data Issue Upon Page Refresh or Direct URL Access

Learn how to resolve the issue of Angular route data being empty when refreshing the page or entering a URL directly in your browser. Follow these simple steps to ensure your route data remains accessible.
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Understanding the Issue: Angular Route Data on Refresh

If you're an Angular developer, you might have encountered a frustrating problem where the data property in the ActivatedRouteSnapshot instance seems to go missing when you refresh the page or enter a URL directly in the browser. This can lead to unexpected behaviors, particularly if you're relying on route data for authentication or other critical functionality.

In this guide, we will explore the reasons behind this issue and walk you through a straightforward solution to ensure your route data remains accessible regardless of how the user navigates to the page.

The Scenario

Consider the following situation: you have set up your Angular routing configuration with a parent route and a child route. The child route has some data properties defined, which include permissions for user access. However, when navigating via a link click, the permissions and other data are available, but they disappear when you refresh the page or access the URL directly.

This can be particularly problematic if your routing logic relies on this data.

The Code Context

RouterModule Routes

Here's an example of how your Angular routes might look:

[[See Video to Reveal this Text or Code Snippet]]

Auth Guard Implementation

Your AuthGuard might resemble the following:

[[See Video to Reveal this Text or Code Snippet]]

The Cause of the Issue

The problem lies in the way you're using the AuthGuard. You've implemented it on both the parent and child routes:

Link Click: When users click the link to navigate to the UserDetails page:

The AuthGuard on the parent route is checked first, and once it passes, it moves to the child route, where the second guard is invoked and data is accessible.

Page Refresh or Direct URL Entry: When the user refreshes or enters the URL:

Both the parent and child guards are invoked consecutively.

The issue arises because the parent route's data is out of scope at this point, leading to inaccessible permissions.

A Simple Solution

To resolve this issue, you have two primary options:

1. Consolidate the Data at the Parent Level

Move the data property from the child route to the parent route. This way, the data will always be available regardless of how the user navigates:

[[See Video to Reveal this Text or Code Snippet]]

2. Remove the Duplicate AuthGuard

Another option is to remove the duplicate AuthGuard from the child route. This means only the parent route's guard will be invoked, allowing access to the data properties:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By consolidating the data property in your Angular routing configuration or properly adjusting how you use guards, you can avoid the frustrating problem of missing route data when refreshing the page or entering a URL directly. This not only improves the reliability of your application but also enhances the user experience by ensuring consistency in route management.

Implement these adjustments, and ensure that your Angular app works seamlessly regardless of how users navigate!