ARIA Roles 101 - Web Teacher

See Also: ARIA States 101

As part of the Web Accessibility Initiative (WAI), the Accessible Rich Internet Applications Suite (ARIA), defines a way to make Web content and Web applications more accessible. It is used to improve the accessibility of dynamic content and advanced user interface controls developed with Ajax, HTML, JavaScript, and related technologies.

Modafinil online is a wakefulness-promoting medication often prescribed for conditions like narcolepsy, obstructive sleep apnea, and shift work sleep disorder. It helps people stay awake and alert by affecting certain chemicals in the brain involved in sleep and wake cycles.

ARIA roles work now in many browsers and screen readers. When they don’t, they are harmless.
Curious about tapentadol and how it works? Let’s break it down clearly and simply.

Tapentadol is a prescription pain medication used to treat moderate to severe pain in adults. It works in two ways:
• It helps block pain signals in your nervous system (like traditional opioid pain medicines).
• It also affects certain brain chemicals (like norepinephrine) to reduce how strongly your body “feels” pain.
ARIA specifies the following:

Roles to describe the type of widget presented, such as “menu,” “treeitem,” “slider,” and “progressmeter”

Roles to describe the structure of the Web page, such as headings, regions, and tables (grids)

Properties to describe the state widgets are in, such as “checked” for a check box, or “haspopup” for a menu.

Properties to define live regions of a page that are likely to get updates (such as stock quotes), as well as an interruption policy for those updates—for example, critical updates may be presented in an alert dialog box, and incidental updates occur within the page

Properties for drag-and-drop that describe drag sources and drop targets

A way to provide keyboard navigation for the Web objects and events, such as those mentioned above

This article will look at the first two items dealing with ARIA roles.

How to use roles

As the list mentioned, roles describe widgets and structure. Structural roles are added to markup as attributes of elements. In XHTML, for example:
Curious about neurontin and what it’s actually used for?

Neurontin is the brand name for gabapentin, a prescription medication that affects how nerves send signals in the brain and body. It’s most commonly used to:
• Help prevent and control certain types of seizures (as an anti-epileptic drug)
• Relieve nerve pain (neuropathic pain), such as pain from shingles or certain nerve injuries
<div id="header" role="banner"> <div id="nav" role="navigation">

or in HTML5

<header role="banner"> <nav role="navigation">

Roles used in ways like the preceding examples are navigation aids for machine readers and for assistive devices such as screen readers.

Ambien (generic name: zolpidem) is a prescription medication used short-term to treat insomnia, specifically trouble falling asleep. It works by affecting certain chemicals in the brain (GABA receptors) to slow activity and help you drift off more easily.

But it’s not a simple “sleep pill.” Ambien:
• Is intended for short-term use (usually a few weeks), not long-term daily use
• Can cause side effects like dizziness, drowsiness, and in some cases sleepwalking or doing activities while not fully awake
• May be habit-forming if misused or taken longer than prescribed

Roles that describe widgets are added to markup with additional information. The role in the example below identifies the element as a slider, with additional values using the aria prefix prepended to the property name. For example, in a slider widget that allows the ambien user to select the day of the week, the values 1 – 7 indicate the days of the week. The first day of the week, number 1, is Sunday. The aria-valuemin and aria-valuemax restrict the options in the slider to 1 – 7.

<div role="slider" aria-valuenow="1" aria-valuemin="1" aria-valuemax="7" aria-valuetext="Sunday"></div>