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Accessibility in Vue Tabs component

02 Feb 2023 / 5 minutes to read

ARIA attributes

Tab component is designed by considering WAI-ARIA standard. Tab is supported with ARIA Accessibility which is accessible by on-screen readers, and other assistive technology devices. The following list of attributes are added in the Tab.

Roles and Attributes Functionalities
tablist Attribute is set to the Tab header element that describes actual role of the element.
tab Attribute is set to the Tab items element to indicates an interactive element inside a tablist that, when activated, displays its associated tabpanel.
tabpanel Attribute is set to the Tab content that describes the role for viewing the active content.
aria-orientation Attribute is set to the Tab header element indicates the Tab header orientation. Default value of this attribute is horizontal.
aria-selected Attribute set to the Tab items to indicates the selection state for Tab items. Active Tab is set to true for this attribute.
aria-labelledby Attribute is set to the Tab content element to indicates the associated Tab header for the content.
aria-controls Attribute is set to the Tab items element to indicates the associated tabpanel for the header.
aria-haspopup Attribute is set to the Popup element to indicates the popup mode in the Tab. The default value of this attribute is false. If popup mode is enabled, the attribute value is set to true.
aria-disabled Attribute set to the Tab items to It indicates the disabled state of the Tab.

Keyboard interaction

By default, keyboard navigation is enabled. This component implements keyboard navigation support by following the WAI-ARIA practices. Once focused on the active Tab element, you can use the following key combination for interacting with the Tab.

Key Description
Left Moves focus to the previous Tab. If focus is on the first Tab, the focus will not move to any Tab.
Right Moves focus to the next Tab. If focus is on the last Tab element, the focus will not move to any Tab.
Enter or Space Selects the Tab if it is not selected. Opens the popup dropdown icon if it is focussed. Select the Tab item as active when popup item is focussed.
Esc(Escape) Closes the popup if popup is in opened state.
Down or Up When the popup is open and focused, it will move to previous/next Tab items of the popup in the vertical direction.
Home Moves focus to the first Tab.
End Moves focus to the last Tab.
Shift + F10 If popup mode is enabled, it opens the popup when the Tab is focused.
Delete Deletes the Tab, if close button is enabled in Tab header.
Source
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app.vue
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<template>
    <div id="app">
   <ejs-tab id="element" heightAdjustMode='Auto'>
    <e-tabitems>
                    <e-tabitem :header='headerText0' :content="content0"></e-tabitem>
                    <e-tabitem :header='headerText1' :content="content1"></e-tabitem>
                    <e-tabitem :header='headerText2' :content="content2"></e-tabitem>
      </e-tabitems>
        </ejs-tab>
  </div>
</template>
<script>
import Vue from 'vue';
import { TabPlugin } from '@syncfusion/ej2-vue-navigations';

Vue.use(TabPlugin);
export default {
  name: 'app',
     data: function(){
        return {

          headerText0: { text: 'ASP.NET' },
          headerText1: { text: 'ASP.NET MVC' },
          headerText2: { text: 'JavaScript' },

        content0: 'ASP.NET is an open-source server-side web application framework designed for web development to produce ' +
        'dynamic web pages. It was developed by Microsoft to allow programmers to build dynamic web sites, web applications ' +
        'and web services. It was first released in January 2002 with version 1.0 of the .NET Framework, and is the successor ' +
        'to Microsoft\'\s Active Server Pages (ASP) technology. ASP.NET is built on the Common Language Runtime (CLR), allowing ' +
        'programmers to write ASP.NET code using any supported .NET language. The ASP.NET SOAP extension framework allows ' +
        'ASP.NET components to process SOAP messages.',

         content1: 'The ASP.NET MVC is a web application framework developed by Microsoft, which implements the ' +
        'model–view–controller (MVC) pattern. It is open-source software, apart from the ASP.NET Web Forms component which is ' +
        'proprietary. In the later versions of ASP.NET, ASP.NET MVC, ASP.NET Web API, and ASP.NET Web Pages (a platform using ' +
        'only Razor pages) will merge into a unified MVC 6.The project is called ASP.NET vNext.',

         content2: 'JavaScript (JS) is an interpreted computer programming language. It was originally implemented as ' +
        'part of web browsers so that client-side scripts could interact with the user, control the browser, communicate ' +
        'asynchronously, and alter the document content that was displayed.[5] More recently, however, it has become common in ' +
        'both game development and the creation of desktop applications.',

        }
}
}
</script>
<style>
  @import "../node_modules/@syncfusion/ej2-base/styles/material.css";
  @import "../node_modules/@syncfusion/ej2-vue-buttons/styles/material.css";
  @import "../node_modules/@syncfusion/ej2-vue-popups/styles/material.css";
  @import "../node_modules/@syncfusion/ej2-vue-navigations/styles/material.css";
</style>
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