[Angular] Router outlet events

For example, we have a component which just simply render router-outlet:

import { Component } from '@angular/core';

@Component({
  selector: 'mail-app',
  styleUrls: ['mail-app.component.scss'],
  template: `
    <div class="mail">
      <router-outlet></router-outlet>
    </div>
  `
})
export class MailAppComponent {}

export const ROUTES: Routes = [
  { path: 'folder/:name', component: MailFolderComponent }
];

We can add events to router-outlet:

import { Component } from '@angular/core';

@Component({
  selector: 'mail-app',
  styleUrls: ['mail-app.component.scss'],
  template: `
    <div class="mail">
      <router-outlet
        (activate)="onActivate($event)"
        (deactivate)="onDeactivate($event)"
      ></router-outlet>
    </div>
  `
})
export class MailAppComponent {
  onActivate(event) {
    console.log(event)
  }

  onDeactivate(event) {
    console.log(event)
  }
}

When we log out the, we see the actual component been rendered into the router-outlet.