Angular: Emit Event Through Router Outlet | by Chinedu Isaiah | Medium
javascript - angular 5 multiple router-outlets on a nested page - Stack Overflow
Angular: Emit Event Through Router Outlet | by Chinedu Isaiah | Medium
Angular Router: A Complete Guide
javascript - Cannot navigate to child routes using router.navigate method or routerlink :: Error : Cannot match any routes. URL Segment: 'child2' - Stack Overflow