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Accessibility in Angular ContextMenu component

The web accessibility makes web content and web applications more accessible for people with disabilities. It especially helps in dynamic content change and development of advanced user interface controls with AJAX, HTML, JavaScript, and related technologies. ContextMenu provides built-in compliance with WAI-ARIA specifications. WAI-ARIA support is achieved through attributes the like aria-expanded and aria-haspopup applied for menu item in ContextMenu. It helps the people with disabilities by providing information about the widget for assistive technology in the screen readers. ContextMenu component contains the menu role and menuItem role.

Properties Functionality
menu This role will be specified for an item that do not have sub menus.
menuItem This role will be specified for an item which don’t have sub menus.
aria-haspopup Indicates the availability and type of interactive popup element.
aria-expanded Indicates whether the subtree can be expanded or collapsed, as well as indicates whether its current state expanded or collapsed.

Keyboard interaction

Keyboard shortcuts Actions
Esc Closes the opened ContextMenu.
Enter Selects the focused menu item.
Up Navigates up or to the previous menu item.
Down Navigates down or to the next menu item.
Left Close the current sub menu and navigates to the parent menu.
Right Navigates and opens the next sub menu.
Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component } from '@angular/core';
import { getInstance } from '@syncfusion/ej2-base';
import { MenuItemModel, ContextMenu } from '@syncfusion/ej2-navigations';

@Component({
  selector: 'app-root',
  template: `
            <div id='target'>Right click / Touch hold to open the ContextMenu</div>
            <ejs-contextmenu id='contextmenu' target='#target' [items]= 'menuItems' (load)="menuOpen()"></ejs-contextmenu>`
})

export class AppComponent {
    public menuItems: MenuItemModel[] = [
        {
            text: 'Cut',
            iconCss: 'e-cm-icons e-cut'
        },
        {
            text: 'Copy',
            iconCss: 'e-cm-icons e-copy'
        },
        {
            text: 'Paste',
            iconCss: 'e-cm-icons e-paste',
            items: [
                {
                    text: 'Paste Text',
                    iconCss: 'e-cm-icons e-pastetext'
                },
                {
                    text: 'Paste Special',
                    iconCss: 'e-cm-icons e-pastespecial'
                }
            ]
        }];

     ngAfterViewInit(): void{
         setTimeout(() => {
            let contextmenuObj: ContextMenu = getInstance(document.getElementById("contextmenu_0"), ContextMenu) as ContextMenu;
            contextmenuObj.open(40, 20);
        }, 300);
     }
}
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);
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