Accessibility in Angular Toast component

14 Nov 20223 minutes to read

The Toast component has been designed keeping in mind the WAI-ARIA specifications, by applying the prompt WAI-ARIA roles, states, and properties along with the keyboard support. Thus, making it usable for people who use assistive WAI-ARIA Accessibility supports that is achieved through the attributes.
It helps to provides information about the elements in a document for assistive technology.
The component implements the keyboard navigation support by following the WAI-ARIA practices and tested in major screen readers.

ARIA attributes

Class	Description
role	alert:        Identifies the element as the container where alert content will be added or updated.

app.component.ts

import { Component, ViewChild } from '@angular/core';

@Component({
    selector: 'app-root',
    template: `
        <div id="toast_target"></div>
        <button ejs-button [isPrimary]="true" (click)="btnClick($event)">Show Toast</button>
        <ejs-toast #element (created)="onCreate($event)" [position] = 'position' >
              <ng-template #title>
                  <div>Matt sent you a friend request</div>
              </ng-template>
              <ng-template #content>
                  <div>Hey, wanna dress up as wizards and ride our hoverboards?</div>
              </ng-template>
    </ejs-toast>
        `
})

export class AppComponent {
    @ViewChild('element') element;
    public position = { X:'Right' };

    onCreate() {
      this.toastShow();
    }
    btnClick() {
      this.toastShow();
    }
    toastShow() {
          setTimeout(
        () => {
            this.element.show();
        }, 700);
    }
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { ToastModule } from '@syncfusion/ej2-angular-notifications';
import { ButtonModule, CheckBoxModule , RadioButtonModule } from '@syncfusion/ej2-angular-buttons';
import { DropDownListModule } from '@syncfusion/ej2-angular-dropdowns';
import { DatePickerModule } from '@syncfusion/ej2-angular-calendars';
import { AppComponent } from './app.component';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule, ToastModule, ButtonModule, CheckBoxModule , RadioButtonModule, DropDownListModule, DatePickerModule
    ],
    declarations: [AppComponent ],
    bootstrap: [AppComponent]
})
export class AppModule { }

main.ts

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

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