Accessibility in Angular Drop down button component

14 Nov 20224 minutes to read

ARIA attributes

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

Properties Functionality
menu Specified for an DropDownButton element.
menuItem Specified for an action items.
aria-haspopup Indicates the availability and type of interactive dropdown popup element.
aria-expanded Indicates whether the current state of the dropdown popup can be expanded or collapsed.
aria-owns Identifies elements to define a visual, functional, or contextual parent or child relationship between DOM(Document Object Model) elements where the hierarchy cannot be used to represent the relationship.

Keyboard interaction

Keyboard shortcuts Actions
Esc Closes the popup.
Enter Opens the popup, or activates the highlighted item and closes the popup.
Space Opens the popup.
Up Navigates up or to the previous action item.
Down Navigates down or to the next action item.
Alt + Up Arrow Closes the popup.
Alt + Down Arrow Opens the popup
import { Component } from '@angular/core';
import { ItemModel, MenuEventArgs } from '@syncfusion/ej2-angular-splitbuttons';

    selector: 'app-root',
    template: `<!-- To render Button. -->
               <button ejs-dropdownbutton [items]='items' content='Clipboard' iconCss='e-icons e-edit'></button>`

export class AppComponent {

   public items: ItemModel[] = [
        text: 'Cut',
        iconCss: 'e-db-icons e-cut'
        text: 'Copy',
        iconCss: 'e-icons e-copy'
        text: 'Paste',
        iconCss: 'e-db-icons e-paste'
        separator: true
        text: 'Font',
        iconCss: 'e-db-icons e-font'
        text: 'Paragraph',
        iconCss: 'e-db-icons e-paragraph'

    public itemBeforeEvent (args: MenuEventArgs) { = '105px';

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


 * Module
    imports: [
    declarations: [AppComponent],
    bootstrap: [AppComponent]
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';