When performing basic route navigation in an Angular 9 application, handling page not found (also known as error 404) and redirecting routes to other routes is a very common task. Luckily for us Angular make this really easy for us.
To redirect a route, simply set the “redirectTo” property of a path, to the path of the desired route. For example; to redirect the default path of your Angular application to a products route, simple define a redirected route as follows
{ path: "", redirectTo: '/products', pathMatch: 'full' }
Sometimes when navigating your Angular application, a user may try to navigate to a route that does not exist. This will result in a 404 error, or a “Page Not Found” error. Ideally when this occurs, you will send your user to a page with details about the failed navigation. To do this, you will use a “wild card” route to intercept invalid URLs and handle them gracefully.
A wildcard route has a path consisting of two asterisks. It matches every URL. The router will select this route if it can’t match a route earlier in the configuration. A wildcard route can navigate to a custom “404 Not Found” component or redirect to an existing route.
{ path: "**", component: PageNotFoundComponent } "
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