Accessibility in Angular Toolbar component

13 Jul 20235 minutes to read

The Angular Toolbar component has been designed, keeping in mind the WAI-ARIA specifications, and applying the WAI-ARIA roles, states, and properties along with keyboard support for people who use assistive devices. WAI-ARIA accessibility support is achieved through attributes like aria-label, and aria-orientation, It provides information about elements in a document for assistive technology. The component implements keyboard navigation support by following the WAI-ARIA practices, and has been tested in major screen readers.

ARIA attributes

The Toolbar element is assigned the role of toolbar.

Property	Functionalities
role=”toolbar”	Attribute is set to the ToolBar element describes the actual role of the element.
aria-orientation	Attribute is set to the ToolBar element to indicates the ToolBar orientation. Default value is `horizontal`.
aria-label	Attribute is set to ToolBar element describes the purpose of the set of toolbar.
aria-expanded	Attribute is set to the ToolBar Popup element to indicates the expanded state of the popup.
aria-haspopup	Attribute is set to the popup element to indicates the popup mode of the Toolbar. Default value is false. When popup mode is enabled, attribute value has to be changed to `true`.
aria-disabled	Attribute set to the ToolBar element to indicates the disabled state of the ToolBar.

Keyboard interaction

Keyboard navigation is enabled by default. Possible keys are

Key	Description
`Left`	Focuses the previous element.
`Right`	Focuses the next element.
`Enter`	When focused on a ToolBar command, clicking the key triggers the click of Toolbar element. When popup drop-down icon is focused, the popup opens.
`Esc(Escape)`	Closes popup.
`Down`	Focuses the next popup element.
`Up`	Focuses the previous popup element.

app.component.ts
app.module.ts
main.ts
import { Component, ViewChild } from '@angular/core';
import { ToolbarComponent } from '@syncfusion/ej2-angular-navigations';

@Component({
    selector: 'app-container',
    template: `
        <ejs-toolbar>
          <e-items>
             <e-item text='Cut' prefixIcon = 'e-cut-icon tb-icons' showTextOn ='Overflow'></e-item>
             <e-item text='Copy' prefixIcon = 'e-copy-icon tb-icons' showTextOn ='Overflow'></e-item>
             <e-item text='Paste' prefixIcon = 'e-paste-icon tb-icons' showTextOn ='Overflow'></e-item>
             <e-item type='Separator'></e-item>
             <e-item text='bold' prefixIcon = 'e-bold-icon tb-icons' showTextOn ='Overflow'></e-item>
             <e-item text='underline' prefixIcon = 'e-underline-icon tb-icons' showTextOn ='Overflow'></e-item>
             <e-item text='italic' prefixIcon = 'e-italic-icon tb-icons' showTextOn ='Overflow'></e-item>
             <e-item type='Separator'></e-item>
             <e-item text='A-Z Sort' prefixIcon = 'e-ascending-icon tb-icons' showTextOn ='Overflow'></e-item>
             <e-item text='Z-A Sort' prefixIcon = 'e-descending-icon tb-icons' showTextOn ='Overflow'></e-item>
          </e-items>
        </ejs-toolbar>
        `
})

export class AppComponent {
    @ViewChild('element') element?: any;

    ngAfterViewInit() {
        document.onkeyup = function (e) {
            if (e.altKey && e.keyCode === 84) {
                (document.getElementById('Toolbar') as HTMLElement).focus();
            }
        };
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { ToolbarModule } from '@syncfusion/ej2-angular-navigations';
import { TooltipModule } from '@syncfusion/ej2-angular-popups';
import { AppComponent } from './app.component';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ToolbarModule, TooltipModule
    ],
    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);