The Accordion 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 like aria-multiselectable, aria-disabled, aria-expanded, aria-selected and aria-hidden.
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.
| Property | Functionality |
|---|---|
| role | presentation: It indicates that the element is used to control presentation. This attribute is added to the Accordion element describing the actual role of the element. heading: It identifies the element as a heading that serves as an Accordion header. This attribute is added to all the Accordion header elements describing the actual role of the element. |
| aria-multiselectable | It indicates the expand mode in the Accordion. Default value of this attribute is true. If expand mode value is changed as ‘single’, the attribute value changes to false. |
| aria-disabled | It indicates the disabled state of the Accordion and its items. |
| aria-expanded | It indicates the expand state of the Accordion Item. Default value of this attribute is false. If an item is expanded, the attribute value changes to ‘true’. |
| aria-selected | It indicates the Selection state of the Accordion Item. Default value of this attribute is false. If an item is expanded, the attribute value changes to ‘true’. |
| aria-hidden | It indicates the content visible state of the Accordion Item. Default value of this attribute is true. If an item content is visible, the attribute value changes to ‘false`. |
| aria-labelledby | Attribute is set to content (panel) and it points to the corresponding Accordion header. |
| aria-controls | Attribute is set to the header and it points to the corresponding Accordion content. |
| aria-level | It defines the hierarchical level of an Accordion element with its inner level. |
Keyboard navigation is enabled by default. Possible keys are:
| Key | Description |
|---|---|
| Space or Enter | When focus is on the Accordion header, click on the focused element makes the element to expand and collapse. |
| Down Arrow | Focus the next Accordion header. |
| Up Arrow | Focus the previous Accordion header. |
| Home | Focus the first Accordion header. |
| End | Focus the last Accordion header. |
@using Syncfusion.EJ2.Navigations;
@Html.EJS().Accordion("defaultAccordion")
.Items(new List<AccordionAccordionItem> {
new AccordionAccordionItem { Header = "ASP.NET", Expanded = true, Content = "Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications and XML Web services. ASP.NET pages execute on the server and generate markup such as HTML, WML, or XML that is sent to a desktop or mobile browser. ASP.NET pages use a compiled,event-driven programming model that improves performance and enables the separation of application logic and user interface." },
new AccordionAccordionItem { Header = "ASP.NET MVC", Content = "The Model-View-Controller (MVC) architectural pattern separates an application into three main components: the model, the view, and the controller. The ASP.NET MVC framework provides an alternative to the ASP.NET Web Forms pattern for creating Web applications. The ASP.NET MVC framework is a lightweight, highly testable presentation framework that (as with Web Forms-based applications) is integrated with existing ASP.NET features, such as master pages and membership-based authentication." },
new AccordionAccordionItem { Header = "JavaScript", Content = "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.More recently, however, it has become common in both game development and the creation of desktop applications." }
})
.Render()
)public ActionResult Index()
{
return View();
}