Angular 6/7辅助插座按路线导航到-清除主插座，它不应该

<ng-container *ngIf="showContent">
  <ng-content></ng-content>
</ng-container>

import { Component, ViewChild } from '@angular/core';
import { TargetComponent } from 'path/to/target.component';

@Component({
  selector: 'app-source',
  template: `
    <button (click)="clearContent()">Clear Main Outlet</button>
    <app-target>
      <div>Content to be cleared</div>
    </app-target>
  `,
})
export class SourceComponent {
  @ViewChild(TargetComponent) targetComponent: TargetComponent;

  clearContent() {
    this.targetComponent.showContent = false;
  }
}

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

@Component({
  selector: 'app-target',
  template: `
    <ng-container *appAuxOutlet>
      <ng-content></ng-content>
    </ng-container>
  `,
})
export class TargetComponent {
  showContent = true;
}