It does not make much sense to go to a link if the page we go to is not found or is not working. Traditionally, we are presented with an error page when this happens. In an SPA, we are more powerful and we can prevent the user from going there altogether, displaying a little courtesy message stating that the page is not available. This greatly enhances the UX since the user can immediately take another action without the need to go back.
Managing errors for your routes
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