The Dos and Don’ts of Using Tabindex

Running a website, whether for an online store or a blog, means thinking about your users—including making your site accessible to everyone. You want as many people as possible to engage with your site, and that includes those who rely on keyboard navigation or assistive technologies.

One minor but powerful way to improve web accessibility is by using the tabindex attribute. Let’s take a closer look at the tabindex attribute, how it works, and why it’s essential for making your website more user-friendly and accessible.

What Is the Tabindex Attribute?

The tabindex attribute is an HTML attribute that helps control the order in which users can move between interactive elements—like links, buttons, and form fields—using just the keyboard. For users who either can’t or prefer not to use a mouse, the ability to navigate a site using the “Tab” key is essential. This group includes people with motor disabilities, vision impairments, or even people using devices where a mouse isn’t an option.

When you press the Tab key, your focus (i.e., where your keyboard inputs go) jumps to the next interactive element on the page. By default, browsers follow a logical order based on the structure of the page’s HTML, starting from the top of the page and moving down. But sometimes, you’ll want to fine-tune that order, and this is where the tabindex attribute comes into play.

How Does Tabindex Work?

There are a few different values you can assign to the tabindex attribute, each of which affects how elements are navigated:

tabindex= "0": This means the element will follow the natural tab order as defined by the document’s structure, but it ensures that the element is focusable.
tabindex= "-1": This removes an element from the tab order, making it not focusable via the keyboard, but it can still be focused by other methods (like using JavaScript). This is useful for things like modal windows, which you only want to be accessible in specific scenarios.
Positive tabindex values (e.g., tabindex= "1" ): Using positive values lets you create a custom tab order. Only use positive tabindex values if you know what you’re doing!

Best Practices for Using Tabindex

If you’re new to using the tabindex attribute, it might seem simple at first glance, but there are a few essential best practices to follow. These will help you avoid common pitfalls and ensure your site remains accessible and easy to navigate.

Stick to `tabindex= "0"` for Most Cases

When you want to make an element focusable, it’s almost always best to use tabindex= "0". This keeps the element in the natural tab order, ensuring users can move through the page logically. Using higher positive values to create a custom order can confuse users, especially those using assistive technologies like screen readers.

Here’s an example of how to use tabindex= “0”:

<div role="button" tabindex="0">Submit</div>
<a tabindex="0">Learn more</a>

Use `tabindex= "-1"` for Hidden or Conditional Elements

Some elements shouldn’t be part of the regular tab order until they’re needed. For example, if you have a modal that opens up after a button is clicked, it doesn’t make sense for a modal to be focusable before it’s visible. This is where tabindex= "-1" is useful.

Here’s how you might use it for a modal:

<div id="myModal" tabindex="-1">
  <p>This is a modal window.</p>
  <button>Close</button>
</div>

When the modal is triggered (through JavaScript), you can set focus to it programmatically:

document.getElementById('myModal').focus();

This ensures the modal is accessible when needed without cluttering the tab order when it’s not.

Test Your Website with Keyboard-Only Navigation

A simple but effective way to check if your tabindex usage is on point is to navigate your site using only the keyboard. Press the Tab key to move forward through the interactive elements, and use Shift+Tab to go backward. Does everything flow smoothly? If you find yourself jumping around the page or missing critical elements, it might be time to revisit your tab order.

Common Mistakes to Avoid

While the tabindex attribute is incredibly useful, it’s also easy to misuse. Here are some common mistakes you’ll want to steer clear of:

Overusing Positive Tabindex Values

It might be tempting to assign custom tab orders everywhere, but overdoing it can lead to a confusing and inconsistent experience. Stick with the natural tab order unless you have a compelling reason to change it.

Skipping Interactive Elements

Make sure that all essential interactive elements—like buttons, form fields, and links—are keyboard-focusable. You don’t want users who rely on keyboard navigation to miss important parts of your site because they’ve been removed from the tab order.

Using Tabindex Instead of Proper HTML

It’s always best to use semantic HTML first. Instead of creating a clickable div with a tabindex= "0", use an actual <button> or <a> element. Not only does this help with accessibility, but it also provides better browser support and consistency across devices.

How Does Tabindex Relate to Web Accessibility Guidelines?

You’ve probably heard of the Web Content Accessibility Guidelines (WCAG) if you’ve been reading up on accessibility. These guidelines are designed to make web content more accessible to people with disabilities, and they’re the foundation of legal requirements like the Americans with Disabilities Act (ADA).

When it comes to keyboard navigation, WCAG has some specific guidelines that tabindex helps address:

WCAG 2.1.1 Keyboard: All site functionality should be operable through a keyboard interface.
WCAG 2.4.3 Focus Order: Navigating through content should follow a logical order that doesn’t confuse the user.

Using tabindex correctly is a step toward ensuring that your website meets these standards, helping you create a more inclusive and legally compliant experience.

Tabbing It All Together

The tabindex attribute is a powerful yet often overlooked tool in web accessibility. When used correctly, it not only aids users with visual or motor impairments but also enhances the overall user experience for everyone navigating your site. Ensuring that your website is accessible isn’t just about compliance with standards like WCAG and ADA—it’s about making your content reachable and usable for all.

Ready to make your website more inclusive and user-friendly? Schedule an ADA briefing with 216digital today. Our team of experts will guide you through the nuances of web accessibility, helping you implement best practices like proper tabindex usage. Let us help you create a more inclusive and legally compliant digital space.