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  • Keyboard Accessibility: A Guide for Web Developers

    Think about the last time you visited a website with a complex menu or a long list of links. If you tried navigating without a mouse—maybe because you found it faster to use the Tab key—you might have encountered invisible outlines, a random tab order, or even getting stuck in a popup with no clear way out. These problems highlight why keyboard accessibility is essential.

    When websites are built so that every button, link, and form field is accessible via keyboard, it becomes easier for everyone to navigate and complete tasks.

    What Is Keyboard Accessibility?

    At its core, keyboard accessibility ensures that everything on a website can be reached and used without a mouse. This is crucial for people with motor impairments who rely on keyboards or assistive devices, as well as users with visual impairments who navigate with screen readers. Even power users benefit, often finding keyboard shortcuts and navigation faster than using a mouse.

    Beyond improving usability, proper keyboard accessibility leads to better-organized code and a more logical page structure—benefits that search engines reward with better SEO rankings. Simply put, improving keyboard accessibility benefits both users and website owners. However, achieving it comes with challenges.

    Common Keyboard Accessibility Challenges

    Despite its importance, keyboard accessibility is often overlooked. Many websites suffer from poor focus visibility, illogical tab orders, and keyboard traps that frustrate users. Addressing these pitfalls is key to creating a smooth, user-friendly experience.

    Below are three of the most common keyboard accessibility issues—and how to fix them.

    1. Designing Effective Focus Indicators

    Focus indicators visually highlight which element is currently selected when navigating with a keyboard. They help users track their position as they move through a webpage using the Tab key.

    Why Focus Indicators Matter

    Imagine navigating a website solely by keyboard. If you press Tab but can’t see where you are because the focus highlight is too faint—or missing altogether—you’re left guessing. This creates confusion and frustration. Clear, high-contrast focus indicators ensure users always know where they are on the page.

    Best Practices for Focus Indicators

    • Outline thickness: At least 2 CSS pixels
    • Outline offset: Keep at least 2 CSS pixels between the outline and the element’s edge
    • Contrast ratio: A minimum of 3:1 between the focus indicator and the background

    Understanding the :focus-visible Pseudo-Class

    The :focus selector applies styles whenever an element gains focus, including when it’s clicked with a mouse. But :focus-visible applies focus styles only when an element is navigated via keyboard, keeping the interface clean for mouse users while ensuring keyboard users get clear visual cues.

    Example:

    *:focus-visible {
      border: 2px solid black; /* Ensure noticeable contrast */
      outline-offset: 2px;
    }

    2. Maintaining a Logical Navigation Order

    Users navigate websites sequentially using the Tab key. The focus order should match the visual layout to avoid confusion. A mismatch disrupts the browsing experience, making it difficult for users to predict what comes next.

    Tips for Logical Navigation

    • Use proper HTML structure: Semantic elements like headers (<h1> – <h6>), lists, and landmarks guide screen readers and browsers to interpret content correctly.
    • Avoid positive tabindex values: Manually setting a positive tabindex can force elements into an unnatural order, leading to confusion.
    • Provide “Skip to Main Content” links: These allow users to bypass repetitive navigation and jump straight to the main content.
    • Beware of keyboard traps: Ensure users can always navigate away from popups, modals, or embedded elements using only the keyboard.

    3. Proper tabindex Implementation

    The tabindex attribute controls how elements receive focus. While useful in some cases, it’s often misused.

    What tabindex Does

    • tabindex="0": Inserts the element into the default tab order based on its position in the DOM. Ideal for custom interactive elements like <div> buttons.
    • tabindex="-1": Removes an element from sequential keyboard navigation but allows focus via scripting. Useful for modals or hidden elements.
    • Positive values (e.g., tabindex="1"): Best avoided, as forcing a custom order can break the expected tab sequence and frustrate users.

    Best Practices

    • Use semantic HTML (<button>, <a>), which is naturally keyboard-accessible.
    • Avoid adding tabindex to non-interactive elements like text or static images.
    • Use negative tabindex for hidden or modal content that should only receive focus under certain conditions.
    • Stick to the natural tab order whenever possible—custom focus orders should be a last resort.

    Testing Your Website’s Keyboard Accessibility

    Even with best practices in place, testing is essential to catch issues before they impact users. A combination of manual and automated testing provides the most reliable results.

    Manual Testing

    • Navigate using only a keyboard: Use the Tab key to move through all interactive elements. Press Enter (or Space) to activate buttons and links.
    • Check focus visibility: Ensure focus indicators are always clear and meet contrast requirements.
    • Verify logical tab order: Does the sequence make sense based on how someone would naturally read or navigate your page?
    • Watch for keyboard traps: Ensure modals, dropdowns, and embedded content allow users to navigate away freely.

    Automated Testing Tools

    Browser-Based Tools

    • Firefox Accessibility Inspector: Displays how the browser interprets focusable elements.
    • Chrome DevTools (Accessibility Panel): Helps analyze the site’s structure.
    • WAVE Evaluation Tool: Flags potential accessibility issues directly in the browser.

    While these tools are powerful, nothing replaces real user feedback. Testing with people who rely on keyboard navigation often reveals hidden issues automated tools miss.

    Conclusion

    Keyboard accessibility is a fundamental part of inclusive web design. Making sure users can navigate your site without a mouse ensures better usability for everyone—including people with disabilities who rely on keyboard navigation. Plus, it improves SEO, usability, and compliance, making it a win-win for both users and businesses.

    The best practices covered here—such as customizing focus indicators, maintaining a logical tab order, and using tabindex responsibly—are essential steps toward a more accessible website. Regular testing, both manual and automated, helps ensure your site meets WCAG guidelines and delivers a smooth experience for all users.

    For expert guidance, consider working with accessibility professionals like 216digital. Specialists can help you implement strategies that go beyond basic compliance, ensuring long-term usability and inclusivity. When you prioritize keyboard accessibility, you create a more welcoming web for everyone—and that’s a goal worth striving for.

    Greg McNeil

    March 13, 2025
    How-to Guides
    Accessibility, keyboard accessibility, Keyboard Navigation, tabindex, Web Accessibility, web developers, web development
  • Keyboard Navigation: A Guide to Accessible Web Testing

    Have you ever tried using the internet without a mouse?

    For millions of people, that’s not just a thought experiment—it’s how they navigate the internet every day. Whether it’s because of physical limitations, visual impairments, or using assistive tech, the keyboard is their main tool. But here’s the thing: if your website doesn’t work smoothly with a keyboard, you’re not just creating a frustrating experience—you’re leaving people behind. 

    So, how does your site stack up? Let’s dive into why keyboard navigation matters and how it plays a key role in building an accessible web.

    Why Keyboard Navigation Matters

    Keyboard navigation is a lifeline for users who can’t rely on a mouse due to physical limitations, visual impairments, or the use of assistive technologies. Moreover, it’s an excellent starting point for testing overall web accessibility. If your website works seamlessly with a keyboard, you’re likely on track to create an inclusive experience for all users.

    How to Navigate a Website with Keyboard Shortcuts

    Before you start testing your website’s accessibility, it’s helpful to understand the most common keyboard shortcuts users rely on. These shortcuts allow people to move through links, buttons, forms, and other interactive elements.

    • Tab Key: Moves focus to the next interactive element.
    • Shift + Tab: Moves focus to the previous element.
    • Enter or Spacebar: Activates a focused element, such as clicking a link or button.
    • Arrow Keys: Scroll through pages or navigate dropdown menus.
    • Escape (Esc): Closes modals, dropdowns, or pop-ups.
    • Ctrl + F: Opens a search bar (in most browsers) to find specific content on the page.

    For Mac users on Safari, enabling full keyboard navigation is a quick adjustment:

    1. Open Safari Preferences.
    2. Go to the Advanced tab.
    3. Check the box next to “Press Tab to highlight each item on a webpage.”

    With these basics in mind, you’re ready to put your website to the test.

    Testing Your Website for Keyboard Navigation

    Keyboard testing doesn’t require fancy tools—just a keyboard, a browser, and a little know-how. Follow this step-by-step guide to evaluate your site’s accessibility.

    Start with the Basics: Can You Navigate Without a Mouse?

    Unplug your mouse and navigate through your homepage and other key pages using only the keyboard. Can you access all essential features and content?

    Check Focus Indicators

    Focus indicators are crucial for users who rely on visual cues. As you use the Tab key, ensure there’s a visible outline around the element currently in focus. Check for the following:

    • The focus indicator is easy to see and contrasts well with the background.
    • The focus moves logically through elements in the order they appear on the page.

    If the focus jumps around or disappears, it creates a frustrating experience for users.

    Test Interactive Elements

    Interactive elements like buttons, links, and form fields should be fully accessible. Specifically:

    • Can you submit a form using the Enter or Spacebar key?
    • Can you open and close modals or dropdown menus with the keyboard?
    • Do navigation menus function seamlessly?

    Verify Skip Navigation Links

    Skip navigation links allow users to bypass repetitive elements, like menus, and jump straight to the main content. To check this:

    • Ensure the skip navigation link is present and functional.
    • Verify it’s one of the first focusable elements when using the Tab key.

    Watch Out for Keyboard Traps

    Keyboard traps occur when users get stuck in an element, like a modal or widget, and can’t move forward. Ensure users can exit these areas by pressing the Escape key or tabbing out.

    Tips for Better Keyboard Navigation

    Creating an accessible website doesn’t happen by accident. Here are a few tips to enhance keyboard navigation for all users:

    • Design with Focus in Mind: Use CSS to style focus outlines for clarity and visibility. Avoid removing focus outlines entirely.
    • Ensure Logical Focus Order: Use semantic HTML (e.g., <button> and <a>) and avoid custom elements that might disrupt natural focus flow.
    • Leverage ARIA Roles and Labels: Use ARIA (Accessible Rich Internet Applications) roles and labels to make custom components like sliders or dropdowns keyboard accessible.
    • Test Regularly: Accessibility is not a one-and-done task. Regular testing ensures your website stays accessible as it evolves.

    Common Challenges and How to Address Them

    Even with the best intentions, challenges may arise. Here are some common issues and solutions:

    • Invisible Focus: Use the :focus pseudo-class in CSS to style interactive elements for better visibility.
    • Complex Widgets: Components like carousels or accordions can lack keyboard support. Build these elements with accessibility in mind or use accessible libraries.
    • Poorly Labeled Links: Ensure all links and buttons have clear, descriptive text or labels so users know what action they’ll perform.

    Why Focus on Keyboard Navigation?

    Beyond accessibility, testing your website for keyboard navigation improves overall user experience and usability. Keyboard accessibility is often a foundation for ensuring compatibility with screen readers and other assistive technologies. If your website works well for a keyboard user, it’s likely on its way to meeting broader accessibility standards like WCAG 2.1.

    Next Steps: Make Your Website Keyboard-Accessible

    Keyboard navigation is more than just a best practice—it’s a cornerstone of inclusive design that invites everyone to participate fully on the web. By ensuring your site is keyboard-accessible, you create a welcoming experience for users of all abilities, reinforce your brand’s commitment to accessibility, and lay a strong foundation for broader ADA compliance.

    If you’re ready to take the next step toward digital inclusion, reach out to 216digital to schedule an ADA briefing. We’ll help you assess your website, develop a tailored plan, and guide you through the process of building an online presence that works for everyone. Don’t wait—contact us today and let’s make the internet a more accessible place together.

    Greg McNeil

    December 24, 2024
    How-to Guides, Testing & Remediation
    Accessibility testing, keyboard accessibility, Keyboard Navigation, User Experience, Web Accessibility
  • The Importance of Keyboard Accessibility & Why ARIA Widgets Don’t Work

    Keyboard accessibility is a fundamental part of creating an accessible web experience. For many people, including those with motor impairments, the ability to navigate a website using only a keyboard is essential. Unfortunately, not all website interactive elements are designed with keyboard users in mind. This is where ARIA (Accessible Rich Internet Applications) widgets often come into play—intended to improve accessibility but frequently falling short when misused.

    Understanding the principles of keyboard accessibility and the limitations of ARIA widgets can help website owners, developers, and content creators deliver a more inclusive user experience. Let’s explore the most common keyboard accessibility issues, why ARIA widgets often miss the mark, and how you can design your website to meet Web Content Accessibility Guidelines (WCAG) standards.

    Why Keyboard Accessibility Matters

    Keyboard accessibility ensures that all interactive elements on a website—like buttons, forms, links, and menus—are reachable and usable without needing a mouse. Many users, such as those with motor disabilities or vision impairments, rely on keyboards, screen readers, or other assistive devices to navigate web content.

    Without keyboard accessibility, people using assistive technology can encounter significant barriers, preventing them from completing tasks or navigating the site. For instance, a checkout form that only allows interaction through mouse clicks will stop a keyboard user in their tracks, impacting their ability to purchase a product or service.

    Common Barriers to Keyboard Accessibility

    Some of the most common obstacles that keyboard users face on websites include:

    Lack of Focus Indicators

    • Problem: Without visible focus indicators, keyboard users may not know where they are on the page. This becomes particularly frustrating when navigating forms or interactive menus.
    • Solution: Use CSS to style focus indicators and make them highly visible, such as by changing the border color, background, or outline. Here’s an example:
    button:focus, a:focus {
    	outline: 3px solid #005fcc;
    	background-color: #f0f8ff;
    }

    Improper Tab Order

    • Problem: Elements on a page need to logically match the visual layout. Without a logical tab order, users may be taken through an erratic sequence, which can lead to confusion and missed information.
    • Solution: Arrange your elements in HTML to follow the intended visual order and limit use of the tabindex attribute. By default, elements will follow the document’s source order, so it’s best to organize your code this way.

    Focus Traps

    • Problem: Focus traps occur when users can’t tab away from a particular element, like a popup or modal. Once they’re stuck, the rest of the page becomes inaccessible until they can close the focus-trapped section.
    • Solution: Ensure focus returns to the main content once the user dismisses the popup or modal, using JavaScript if necessary:
    // Example of returning focus after modal close
    document.getElementById("closeModalButton").addEventListener("click", function() {
      document.getElementById("mainContent").focus();
    });

    ARIA Widgets and Their Challenges

    ARIA (Accessible Rich Internet Applications) is a set of attributes that help improve the accessibility of web applications, particularly for screen readers. However, ARIA widgets—such as dropdowns, sliders, and modals—often don’t work as expected for keyboard users if not implemented carefully. ARIA can enhance accessibility, but it can’t “fix” poor coding practices or make non-native elements fully functional on its own.

    Why ARIA Widgets Often Fail

    ARIA widgets can be highly effective but only if they’re properly coded, tested, and consistently used with accessibility in mind. Here are some common pitfalls:

    Reliance on ARIA Without Semantic HTML

    ARIA is not a replacement for HTML5 elements; it’s meant to enhance them. Using ARIA on elements that don’t support native keyboard interactions (like <div> for a button) means the widget might lack inherent keyboard functionality.

    For example, instead of creating a clickable div with ARIA, use a <button> tag. Buttons come with native keyboard functionality and don’t require extra scripting or attributes to work as expected.

    Overuse of role and tabindex Attributes

    Misusing role attributes can disrupt how screen readers interact with elements. For instance, assigning a role= "button" to a div won’t make it work the same way as a real button.

    Similarly, improper use of tabindex can cause elements to jump around in an illogical order. Stick to the natural flow of the DOM, using tabindex= "0" only when absolutely necessary to keep the order in sync.

    JavaScript-Dependent Behavior

    ARIA widgets often rely on JavaScript to replicate native interactions, but these scripts must be meticulously coded and tested. A JavaScript error could render an entire widget inaccessible.

    Testing your scripts thoroughly with keyboard-only navigation is essential, especially for ARIA widgets. Missing key events like “Enter” or “Escape” can trap users in a widget or make it difficult to interact with.

    Best Practices for Creating Keyboard-Accessible Interactive Elements

    To avoid these pitfalls and ensure that your site is truly keyboard accessible, follow these best practices:

    Prioritize Native HTML Elements

    Whenever possible, use native HTML elements for interactivity (like <button>, <a>, <input>, and <select>). They come with built-in accessibility and keyboard support, reducing the need for complex ARIA attributes or custom JavaScript.

    Use ARIA Judiciously

    Use ARIA only when there’s no HTML equivalent, like custom dropdowns or sliders. And if you do need ARIA attributes, implement them carefully with an understanding of their purpose. For example, use aria-expanded to indicate the open or closed state of a dropdown menu:

    <button aria-expanded="false" aria-controls="menu">Menu</button>
    <ul id= "menu" hidden>
      <li><a href="#home">Home</a></li>
      <li><a href="#about">About</a></li>
    </ul>

    Enable Logical Focus Management

    Ensure that interactive elements maintain a logical and intuitive focus order. When creating modals or popups, use JavaScript to trap focus within the modal until it’s closed and then return focus to the last element interacted with:

    const modal = document.getElementById("modal");
    const lastFocus = document.activeElement;
    // Trap focus within modal
    modal.addEventListener("keydown", (e) => {
      if (e.key === "Tab") {
        // Logic to keep focus within modal
      }
    });
    // Restore focus after modal close
    modal.addEventListener("close", () => {
      lastFocus.focus();
    });

    Include Skip Links

    Skip links are simple yet effective. They allow keyboard users to jump directly to the main content, bypassing repetitive navigation menus. Add a skip link that appears when focused, like this:

    <a href="#mainContent" class="skip-link">Skip to main content</a>
    <main id="mainContent">
      <!-- Main content here -->
    </main>

    The Importance of Testing for Keyboard Accessibility

    Testing is critical to achieving real keyboard accessibility. Use keyboard-only navigation to interact with your site, ensuring that each element responds to the Tab, Enter, and Escape keys appropriately. Here are a few tips for testing:

    1. Turn Off Your Mouse: Try navigating your site using only the keyboard. See if you can reach every interactive element and complete all tasks.
    2. Use Assistive Technology Simulators: There are free screen readers (such as NVDA or VoiceOver) that let you experience your website as a keyboard-only user would.
    3. Run Accessibility Audits: Automated tools like Google Lighthouse or WAVE can catch many keyboard accessibility issues, but a manual review is still necessary.

    Conclusion

    Keyboard accessibility is a must for ensuring inclusivity on your website. By avoiding ARIA misuse and sticking to native HTML elements where possible, you’ll reduce barriers for keyboard users and create a smoother experience. Remember, ARIA attributes can enhance interactivity, but they aren’t a substitute for accessible design principles.

    Testing with keyboard-only navigation will confirm that your site meets WCAG standards and shows your commitment to creating a web experience that everyone can enjoy—just in time for all your visitors to get the most out of your content and promotions. Reach out to 216digital using the contact form below if you’re unsure if your website is keyboard navigable.

    Bobby

    October 29, 2024
    How-to Guides
    ARIA, How-to, keyboard accessibility, web developers, web development
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