Angular/Ionic Call a function on Navigation change — forward/back.

How to call a function on every route change in Angular.

Subscribe to the router events even you can filter them out on the basis of navigation state may be start, end or so, for example —

(This function calls on both: navigate forward or back from another page.)

import { Router, NavigationEnd } from '@angular/router';
@Component({...})
constructor(private router: Router) {
  this.router.events.subscribe((ev) => {
    if (ev instanceof NavigationEnd) {
      /* Your code goes here on every router change */
      /* this function calls on navigate forward or back from another page */
    }
  });
}

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