Angular: Determine previous page URL

The getCurrentNavigation method of the angular router returns a property previousNavigation that has details on the previous navigation.

This can be used to determine the previous page url, or even if there was no previous navigation (initial load of a particular route).

It's worth noting that this method only works when used in the constructor of a components class.

export class SomeComponent { constructor( private router: Router, ) { const previousNavigation = this.router.getCurrentNavigation().previousNavigation; const previousUrl = previousNavigation.finalUrl; } } 

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