What is the first rule of ARIA?

The first rule of Accessible Rich Internet Applications (ARIA) is to use native Hypertext Markup Language (HTML) elements whenever possible before applying custom attributes. Native elements have built-in keyboard navigation and accessibility behaviors. ARIA attributes should only supplement custom controls when no semantic HTML equivalent exists to support the required user interaction.

Does ARIA change visual design or styling?

Accessible Rich Internet Applications (ARIA) attributes do not affect the visual presentation, styling, or functional behavior of a web page for sighted users. They exist solely to communicate interface structure, dynamic changes, and component states to assistive technology software, such as screen readers, used by individuals with disabilities.

How does ARIA relate to WCAG compliance?

Web Content Accessibility Guidelines (WCAG) require that user interface components convey their purpose, state, and operation to assistive technology. When standard Hypertext Markup Language (HTML) cannot fulfill these requirements, developers use Accessible Rich Internet Applications (ARIA) to achieve compliance. Incorrectly implemented ARIA attributes can create accessibility barriers and result in WCAG violations.

Accessibility

ARIA

Accessible Rich Internet Applications (ARIA) is a set of Hypertext Markup Language (HTML) attributes that describes custom interactive elements to assistive technology when standard markup is insufficient.

also called: Accessible Rich Internet Applications, aria-label

// definition

Accessible Rich Internet Applications (ARIA) is a specification maintained by the World Wide Web Consortium (W3C) that adds specialized markup attributes to Hypertext Markup Language (HTML). Standard HTML provides built-in accessibility for basic page elements like links, buttons, and form inputs. However, modern web applications frequently use custom JavaScript controls, such as expandable menus, tabbed panels, and dynamic status updates, which basic markup cannot adequately describe to screen readers.

ARIA resolves this limitation by communicating roles, states, and properties of custom controls to assistive technologies. Roles define what an element is, such as a slider or tab. States and properties indicate current conditions, such as whether a menu is expanded or collapsed. ARIA modifies how assistive devices interpret the user interface without altering the physical appearance or visual behavior of the web page.

// why it matters

Modern web applications rely heavily on dynamic interfaces that standard markup cannot fully describe. Implementing Accessible Rich Internet Applications (ARIA) correctly ensures that screen reader users can navigate complex software products, complete transactions, and access vital services without barriers. Failure to provide proper ARIA attributes can render digital products unusable for disabled customers, increasing legal risks under international accessibility standards such as the Web Content Accessibility Guidelines (WCAG). Conversely, proper implementation expands market reach, improves user satisfaction, and demonstrates commitment to digital inclusion while mitigating legal liability for non-compliance.

// example

A web developer creates a custom drop-down menu using standard Hypertext Markup Language (HTML) division elements instead of a native select element. To ensure accessibility, the developer adds an Accessible Rich Internet Applications (ARIA) role of menu to the container and sets an ARIA expanded attribute on the toggle button. When a user opens the menu, JavaScript updates the expanded attribute from false to true. A screen reader immediately announces this change, allowing visually impaired users to understand the current interaction state.

Questions and Answers

What is the first rule of ARIA?: The first rule of Accessible Rich Internet Applications (ARIA) is to use native Hypertext Markup Language (HTML) elements whenever possible before applying custom attributes. Native elements have built-in keyboard navigation and accessibility behaviors. ARIA attributes should only supplement custom controls when no semantic HTML equivalent exists to support the required user interaction.
Does ARIA change visual design or styling?: Accessible Rich Internet Applications (ARIA) attributes do not affect the visual presentation, styling, or functional behavior of a web page for sighted users. They exist solely to communicate interface structure, dynamic changes, and component states to assistive technology software, such as screen readers, used by individuals with disabilities.
How does ARIA relate to WCAG compliance?: Web Content Accessibility Guidelines (WCAG) require that user interface components convey their purpose, state, and operation to assistive technology. When standard Hypertext Markup Language (HTML) cannot fulfill these requirements, developers use Accessible Rich Internet Applications (ARIA) to achieve compliance. Incorrectly implemented ARIA attributes can create accessibility barriers and result in WCAG violations.