How to define if component nested to itself in Angular 6?

How to define if component nested to itself in Angular 6?

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How to define if component nested to itself in Angular 6?
Tag : javascript , By : eastcoastj
Date : December 05 2020, 12:18 PM

wish helps you I found the solution with dependency injection parameters @Optional and @SkipSelf. If the menu has the same menu among the ancestors, then this menu is nested. Same for menu items.
constructor(@Optional() @SkipSelf() parentMenu: MenuComponent) {
  if (parentMenu) {
    this.class = 'nav-submenu';

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Child Component to Parent Component Communication without a Children Nested in a Template in Angular (Angular 2+)

Tag : angularjs , By : Shane
Date : March 29 2020, 07:55 AM
I wish this helpful for you If you go to that plunker you'll see that they have the following structure:
    <md-radio-group class="example-radio-group" [(ngModel)]="favoriteSeason">
        <md-radio-button class="example-radio-button" *ngFor="let season of seasons" [value]="season">
    <div class="example-selected-value">Your favorite season is: {{favoriteSeason}}</div>

Pass data from Parent Component to nested Child Component in Angular

Tag : angular , By : Josh Tegart
Date : March 29 2020, 07:55 AM
it helps some times I am having difficulties understanding how to make data available between Angular components. I have read up on @Input and @Output, but I am not sure whether this is what I need to use, and if so, how. , Template solution:
@Input() assetId: string;
<asset assetId="x"></asset>
@Input() assetId: string;
<document [assetId]="assetId"></document>
export class AssetComponent {
  @ViewChild(DocumentComponent) document: DocumentComponent;
  @Input() set assetId(assetId) {
    this._assetId = assetId;
    this.document.assetId = assetId;

  get assetId() {
    return this._assetId;

  private _assetId: string;

Angular: How do I keep component state in nested component tree when parent list is replaced

Tag : angular , By : user86493
Date : March 29 2020, 07:55 AM
should help you out That's what trackBy is for. With it, Angular will only refresh what needs to be refreshed. I'm assuming Id is unique here.
In template:
        *ngFor="let subItem of item.Children; trackBy: trackById"
  trackById = (item) => item.Id;

Are Angular lifecycle hooks called on every component of a nested component structure?

Tag : angular , By : Ivan Belov
Date : March 29 2020, 07:55 AM
will be helpful for those in need Change detection flows from parent to child components. As for ngOnChanges lifecycle, it is called when a bounded property of a component(decorated with @Input() decorator) changes in the parent component.
This article explains it quite well.

Angular click event triggers on entire component in recursive nested component

Tag : angular , By : user170635
Date : March 29 2020, 07:55 AM
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