从父节点调用Child方法(并传递数据)，子节点将是angular中动态加载的组件(路由器插座或延迟加载子节点

<app-child #childRef></app-child>

import { Component, ViewChild } from '@angular/core';
import { ChildComponent } from './child.component';

@Component({
  selector: 'app-parent',
  template: `
    <app-child #childRef></app-child>
    <button (click)="callChildMethod()">Call Child Method</button>
  `,
})
export class ParentComponent {
  @ViewChild('childRef') childComponent: ChildComponent;

  callChildMethod() {
    this.childComponent.childMethod('Hello from parent!');
  }
}

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

@Component({
  selector: 'app-child',
  template: `Child Component`,
})
export class ChildComponent {
  childMethod(data: string) {
    console.log(data);
  }
}