Understanding Web Accessibility and ARIA Best Practices

A research-based overview of web accessibility, ARIA attributes, and best practices for building inclusive websites.

Jacob Evenson Wed Feb 25 2026 18:00:00 GMT-0600 (Central Standard Time)

Understanding Web Accessibility and ARIA Best Practices

What Is Web Accessibility?

Web accessibility is the practice of designing and developing websites so that people with disabilities can use them effectively. This includes individuals who rely on screen readers, keyboard navigation, voice commands, magnification tools, or other assistive technologies.

Accessibility ensures that websites are usable by people with:

• Visual impairments
• Hearing impairments
• Motor disabilities
• Cognitive disabilities
• Temporary injuries or situational limitations

Accessibility is important because:

• It promotes equal access to information.
• It is required by law for many organizations (such as ADA compliance).
• It improves usability for everyone.
• It enhances SEO and overall site quality.

Accessibility is not just about compliance — it is about inclusive design.

Best Practices for Making Web Pages Accessible

To build accessible web pages, developers should:

1. Use Semantic HTML

Use proper HTML elements instead of generic <div> containers.

Example:

<header>
  <nav>
    <ul>
      <li><a href="/">Home</a></li>
      <li><a href="/blog">Blog</a></li>
    </ul>
  </nav>
</header>

Semantic elements help screen readers understand structure.

2. Provide Alt Text for Images

<img src="team-photo.jpg" alt="Our development team collaborating in an office setting">

Alt text describes the purpose of the image for screen reader users.

3. Ensure Keyboard Navigation Works

Users must be able to navigate using the Tab key.

Example:

<button>Submit</button>

Avoid clickable <div> elements unless you add proper accessibility attributes.

4. Maintain Good Color Contrast

Text should be readable against its background. Avoid light gray text on white backgrounds.

5. Associate Labels with Form Inputs

<label for="email">Email Address</label>
<input id="email" type="email">

This allows screen readers to announce the correct label.

What Are ARIA Attributes?

ARIA stands for Accessible Rich Internet Applications.
ARIA attributes help provide additional accessibility information to assistive technologies when standard HTML is not enough.

Important note:

ARIA should enhance semantic HTML — not replace it.

Examples of ARIA Attributes

Below are examples of commonly used ARIA attributes.

1. aria-label

Provides an accessible label when visible text is not sufficient.

<button aria-label="Close navigation menu">
  ✕
</button>

Purpose: Screen readers will announce "Close navigation menu" instead of just "button".

2. aria-hidden

Hides decorative elements from screen readers.

<span aria-hidden="true">★</span>

Purpose: Prevents screen readers from announcing decorative symbols.

3. aria-expanded

Indicates whether expandable content is open or closed.

<button aria-expanded="false" aria-controls="menu">
  Toggle Menu
</button>

<div id="menu" hidden>
  <a href="/about">About</a>
</div>

Purpose: Tells screen readers whether a collapsible section is currently expanded.

4. aria-describedby

Associates additional descriptive text with an element.

<label for="password">Password</label>
<input id="password" type="password" aria-describedby="passwordHint">
<small id="passwordHint">Must be at least 8 characters.</small>

Purpose: Provides extra instructions that screen readers will announce.

5. aria-live

Announces dynamic updates automatically.

<div aria-live="polite" id="statusMessage"></div>

<script>
  document.getElementById("statusMessage").textContent = "Form submitted successfully!";
</script>

Purpose: Notifies screen readers when content updates without requiring a page refresh.

6. aria-invalid

Indicates when a form field has an error.

<input type="email" aria-invalid="true">

Purpose: Tells assistive technology that the input currently contains invalid data.

When Should You Use ARIA?

Use ARIA when:

• You create custom components (dropdowns, modals, tabs)
• Dynamic content updates
• Native HTML cannot communicate enough information

Do NOT use ARIA when proper semantic HTML already solves the problem.

Resources Used for Research

1. W3C Web Accessibility Initiative (WAI)
   https://www.w3.org/WAI/

2. MDN Web Docs – ARIA
   https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA

3. WebAIM Accessibility Resources
   https://webaim.org/

4. The A11Y Project
   https://www.a11yproject.com/

Conclusion

Web accessibility is essential for creating inclusive and professional websites. By using semantic HTML, proper form labeling, keyboard-friendly navigation, and ARIA attributes when necessary, developers can ensure their applications are usable by everyone.

Accessibility improves usability, search engine optimization, and legal compliance — but most importantly, it ensures equal access to information.

As developers, applying accessibility best practices is both a professional responsibility and an ethical commitment.