Enable or disable context menu items in Angular ContextMenu component

import { Component, ViewChild } from '@angular/core';
import { ContextMenuComponent, MenuEventArgs, MenuItemModel } from '@syncfusion/ej2-angular-navigations';

@Component({
  selector: 'app-root',
  template: `<!--target element-->
            <div id="target">Right click / Touch hold to open the ContextMenu</div>
            <!-- To Render ContextMenu. -->
            <ejs-contextmenu #contextmenu target='#target' [items]='menuItems' (created)='onCreated()' (beforeOpen)='beforeOpen()'></ejs-contextmenu>`
})

export class AppComponent {

    @ViewChild('contextmenu')
    public contextmenu: ContextMenuComponent;

    // ContextMenu items definition
    public menuItems: MenuItemModel[] = [
    {
        text: 'View',
        items: [
          {
            text: 'Large icons'
          },
          {
            text: 'Medium icons'
          },
          {
            text: 'Small icons'
          }
        ]
    },
    {
        text: 'Sort By'
    },
    {
        text: 'Refresh'
    },
    {
        separator: true
    },
    {
        text: 'New'
    },
    {
        separator: true
    },
    {
        text: 'Display Settings'
    },
    {
        text: 'Personalize'
    }];

    onCreated(): void {
      this.contextmenu.enableItems(['Display Settings'], false);
    }

    beforeOpen(): void {
      this.contextmenu.enableItems(['Medium icons'], false);
    }
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ContextMenuModule } from '@syncfusion/ej2-angular-navigations';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        ContextMenuModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);