angular - 将数据传递到 "router-outlet"子组件

Question

我有一个父组件去服务器并获取一个对象:

// parent component

@Component({
    selector : 'node-display',
    template : `
        <router-outlet [node]="node"></router-outlet>
    `
})

export class NodeDisplayComponent implements OnInit {

    node: Node;

    ngOnInit(): void {
        this.nodeService.getNode(path)
            .subscribe(
                node => {
                    this.node = node;
                },
                err => {
                    console.log(err);
                }
            );
    }

并且在几个 child 展示之一中:

export class ChildDisplay implements OnInit{

    @Input()
    node: Node;

    ngOnInit(): void {
        console.log(this.node);
    }

}

我似乎无法将数据注入(inject)router-outlet。看起来我在 Web 控制台中收到了错误:

Can't bind to 'node' since it isn't a known property of 'router-outlet'.

这有点道理，但我将如何执行以下操作:

1. 从父节点中从服务器获取“节点”数据组件？
2. 将我从服务器检索到的数据传递到子路由器导出？

router-outlets 的工作方式似乎不同。

Answer 1

<router-outlet [node]="..."></router-outlet> 

只是无效的。路由器添加的组件作为兄弟添加到 <router-outlet>并且不会取代它。

另见 https://angular.io/guide/component-interaction#parent-and-children-communicate-via-a-service

@Injectable() 
export class NodeService {
  private node:Subject<Node> = new BehaviorSubject<Node>([]);

  get node$(){
    return this.node.asObservable().filter(node => !!node);
  }

  addNode(data:Node) {
    this.node.next(data);
  }
}

@Component({
    selector : 'node-display',
    providers: [NodeService],
    template : `
        <router-outlet></router-outlet>
    `
})
export class NodeDisplayComponent implements OnInit {
    constructor(private nodeService:NodeService) {}
    node: Node;
    ngOnInit(): void {
        this.nodeService.getNode(path)
            .subscribe(
                node => {
                    this.nodeService.addNode(node);
                },
                err => {
                    console.log(err);
                }
            );
    }
}

export class ChildDisplay implements OnInit{
    constructor(nodeService:NodeService) {
      nodeService.node$.subscribe(n => this.node = n);
    }
}