The never-ending refresh cycle triggered by canActivate in Angular 2+

While trying to implement the canActivate feature in my app routing, I keep encountering a problem. Every time I compile the app, the console log keeps refreshing with error messages that shouldn't be there because I had already used console.log() for debugging purposes.

What could be causing this issue?

Answer №1

When a user is not logged in, the code <code>this.router.navigate([''], {queryParams: {returnUrl: state.url}});
will be triggered, leading to infinite redirects if your router configuration is not set up properly.

To avoid this issue, make sure to include a specific path for components like LoginComponent. Additionally, ensure that {path: '**', redirectTo: ''} directs users to a CatchUnmatchedPathComponent where a 404 page is displayed.

Answer №2

The route you are redirecting to in your canActivate method is incorrect. Please redirect to login. Here is the adjustment you should make:

// if user is not logged in, navigate to login page
this.router.navigate(['login'], {queryParams: {returnUrl: state.url}});

Redirecting to '' creates a loop back to the canActivate guard, causing an infinite loop.

https://i.sstatic.net/aBcDe.gif

Answer №3

When you use

this.router.navigate([''], {queryParams: {returnUrl: state.url}});
, it leads to navigating back to the root path, triggering the guard again and causing a loop.

Instead, consider using

this.router.navigate(['/login'], {queryParams: {returnUrl: state.url}});

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