Accessibility Best Practices: Building Inclusive Next.js Apps

Previously in this course, we covered internationalization basics to prepare our content for a global audience. In this lesson, we shift our focus from language to inclusivity, ensuring that your blog is usable by everyone, including users who rely on screen readers or keyboard navigation.

Building for accessibility, or a11y, isn't just about meeting compliance standards; it’s about ensuring that your UI is robust, predictable, and usable. When you get this right, you often improve the experience for all users—not just those with disabilities.

Semantic HTML: The Foundation of A11y

The most effective way to improve accessibility is to use HTML as it was intended. Screen readers rely on the structural context provided by semantic tags to navigate a page.

Instead of wrapping everything in <div> or <span> elements, use tags that describe their content:

• <header>, <nav>, <main>, <footer>: These define the document outline.
• <article>: Perfect for your blog post content.
• <button>: Use for interactive elements that trigger actions, not <div> tags with onClick handlers.

In our project, review your layout.js and page.js files. If you find div elements acting as navigation or landmarks, replace them with their semantic counterparts. A screen reader can jump directly to a <nav> or <main> landmark, saving users from hearing the entire page read back to them.

Managing Keyboard Navigation

Many users navigate the web exclusively via the Tab key. If your UI relies on hover states or custom interactive elements, these users may be unable to interact with your blog.

1. Never remove focus outlines: While CSS outline: none might look "cleaner," it makes it impossible for keyboard users to see which element is currently active.
2. Use natural tab order: Keep your focusable elements in a logical flow. If you must change the order, use the tabindex attribute carefully, though the best approach is to structure your DOM correctly in the first place.
3. Interactive Elements: If you build a custom modal or a dropdown menu, you must manage focus. When a modal opens, focus should move to the modal; when it closes, it should return to the button that opened it.

Strategic Use of ARIA Labels

ARIA (Accessible Rich Internet Applications) is a set of attributes that bridge the gap when standard HTML isn't enough. However, the first rule of ARIA is: If you can use a native HTML element, do it.

When you must use ARIA, use it to provide context that isn't visible to the eye:

• aria-label: Use this when a button lacks text (e.g., a "Delete" button with just an icon).
• aria-expanded: Essential for components like accordions or navigation menus to tell screen readers whether the content is currently visible.
• aria-live: Used for elements that update dynamically, such as search results or error messages in your forms.

Worked Example: Accessible Icon Buttons

In our blog's comment section, we likely have an icon button for deleting or editing comments. A screen reader will just read "button," which is unhelpful.

JSX
// A bad example:
<button onClick={handleDelete}>
  <TrashIcon />
</button>

// A professional, accessible example:
<button 
  onClick={handleDelete} 
  aria-label="Delete comment"
>
  <TrashIcon aria-hidden="true" />
</button>

By adding aria-label, we describe the action. By adding aria-hidden="true" to the icon itself, we tell the screen reader to ignore the decorative element, preventing it from reading "Trash Icon, Delete comment."

Practice Exercise

Audit your current blog project. Look at your navigation bar and your comment submission form.

1. Identify one component where the intent is unclear to a screen reader.
2. Apply an aria-label to provide context.
3. Test your site by unplugging your mouse and navigating through the entire blog using only the Tab and Enter keys. Can you reach every link? Do you know where you are at all times?

Common Pitfalls

• Over-using ARIA: Adding role="button" to a div is a "band-aid" fix. It makes the element look like a button to a screen reader, but it doesn't give you the native keyboard support (like Enter and Space triggering the click) that a real <button> tag provides.
• Ignoring Color Contrast: Even with perfect HTML, if your text is light gray on a white background, users with low vision cannot read it. Use tools like the browser's Accessibility Inspector to check contrast ratios.
• Assuming Mouse Usage: Always design your interactive elements to handle focus states just as carefully as hover states.

FAQ

Q: Do I need to be an expert in WCAG to make my site accessible? A: Not at all. Start by using semantic HTML and ensuring everything is keyboard-navigable. That covers 80% of the most common issues.

Q: Should I use aria-label everywhere? A: No. Use it only when the label is not already visible in the text. For a "Submit" button, the text "Submit" is enough.

Q: How do I test accessibility in Next.js? A: Use the axe DevTools browser extension. It will scan your page and suggest specific fixes for common violations.

Recap

Accessibility is an ongoing process of refinement. By prioritizing semantic HTML, maintaining a logical keyboard flow, and using ARIA only when necessary, you make your application usable for a wider range of people. If you want to dive deeper into styling for inclusivity, check out our guide on Accessibility Best Practices: Building Inclusive Tailwind Sites.

Up next: We will tackle complex form handling, ensuring that your user input patterns are as accessible and robust as the rest of your site.