![angular 4 ng test Failed: Template parse errors: 'router-outlet' is not a known element: - Stack Overflow angular 4 ng test Failed: Template parse errors: 'router-outlet' is not a known element: - Stack Overflow](https://i.stack.imgur.com/vSA8z.png)
angular 4 ng test Failed: Template parse errors: 'router-outlet' is not a known element: - Stack Overflow
![router-outlet is appending rather than replacing when using BrowserAnimationsModule · Issue #20290 · angular/angular · GitHub router-outlet is appending rather than replacing when using BrowserAnimationsModule · Issue #20290 · angular/angular · GitHub](https://user-images.githubusercontent.com/11135104/40135786-cb93dcc2-5963-11e8-90e3-96231edb2caf.png)
router-outlet is appending rather than replacing when using BrowserAnimationsModule · Issue #20290 · angular/angular · GitHub
GitHub - CodingCatDev/lesson-9-angular-material-router-outlet: Angular Material Router Outlet with named routes and Lazy Loading
![Angular Router Series: Pillar 2 — Understanding The Router's Navigation Cycle | by Nate Lapinski | Angular In Depth | Medium Angular Router Series: Pillar 2 — Understanding The Router's Navigation Cycle | by Nate Lapinski | Angular In Depth | Medium](https://miro.medium.com/max/4196/1*h-F92CRbwP5rDfrxZzT6kw.png)