Angular 4 Can't bind to <property> since it isn't a known property of <component>

Question

I'm trying to create my own directive in Angular 4. But, I got this error when bind the property of class into component template.

Console error:

Unhandled Promise rejection: Template parse errors: Can't bind to
'data' since it isn't a known property of 'tree'. ("<tree [ERROR
->][data]="data"></tree>"):

My tree-view-component.ts:

@Component({
    selector: 'app-tree-view',
    template: '<tree [data]="data"></tree>'
})
export class TreeViewComponent implements OnInit {

    @Input() data: any[];

    constructor() {
        this.data = [
        {
            label: 'a1',
            subs: [
                {
                    label: 'a11',
                    subs: [
                        {
                            label: 'a111',
                            subs: [
                                {
                                    label: 'a1111'
                                },
                                {
                                    label: 'a1112'
                                }
                            ]
                        },
                        {
                            label: 'a112'
                        }
                    ]
                },
                {
                    label: 'a12',
                }
            ]
         }
     ];
  }

  ngOnInit() { }

}

Here is my complete script file: https://pastebin.com/hDyX2Kjj

Is there anyone know about this? TiA

Answer 1

Every component, directive, and pipe needs to be registered in @NgModule()

@NgModule({
  declarations: [TreeViewComponent]
})
export class AppModule {}

For more details see

• https://angular.io/api/core/NgModule
• https://angular.io/guide/ngmodules
• https://angular.io/guide/ngmodule-api