Blazor Router.OnNavigateAsync accept cancel or NavigationManager.ChangingHandler can handle first request

[cyuz]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

I'm using Blazor 8 Interactive Serve to complete a system.

I want redirect user to another page, if some condition meets.

• But Router.OnNavigateAsync cannot cancel previous navigation context, user sometimes see a flash.
• NavigationManager.ChangingHandler can cancel, but it cannot handle first navigation.

current workaround is a mix of

1. Set a mask flag to hide display
2. Try redirect in OnInitializedAsync, or clear flag
3. NavigationManager.ChaningHandler
4. Clear flag in OnLocationChanged

Describe the solution you'd like

Expect a one-shot centralize solution

Additional context

No response

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [Blazor] Enable cancellation of navigation events #42877

[cyuz]

https://github.com/cyuz/BlazorRedirect

modify App.razor

• use RoutesWithOnNaviagte, will see some flash before change to navigation target.(becuase old navigation still running)
• use RoutesWithLocationChanging, not work at first open url with browser.
• use RoutesWorkaround, final solution but complex.