5 HTML elements, And a partridge in a despair tree
by James Bateson published on
HTML is a beautiful programming language. It comes with many out-of-the-box accessibility benefits—it conveys semantic meaning to assistive technology, enabling people to consume content and complete often important journeys that they may not be able to do outside of the web. So why is all that goodness we can get for free ignored so often?
Let's start with a topic that people will have seen many discussions around—interactive buttons. Take a look at the latest postings on the HTMLHell site, which will no doubt feature this issue heavily!
A button is often used to toggle or activate some dynamic functionality for a user. That could be to reveal a menu with important pages included, submit a form, toggle expandable content, and so on.
HTML includes the
<button> element. This tells people that it can be interacted with and can help communicate the state of a component. By default, it is focusable, has key events, and comes with some browser default styles.
<button type="button">I'm a real button</button>
Here we have some default browser styling making it look like a button, have focus behavior handled for us, and have key events mapped to it (
keydown, etc) making it act like a button. Because it is a button!
Unfortunately, a pattern that is all too common–and used in the wrong circumstances–is to turn a non-interactive element into a faux button.
This will often be achieved with an ARIA role:
<div role="button" tabindex="0">I'm not a button</div>
<div> (a non-semantic element designed for containing things) would now be announced as an interactive element by assistive technology, this is all well and good, but is it robust and accessible? No.
We're telling assistive technology that it's a button, but providing none of the functionality that comes with the native element.
Whilst using a native button is a great start, there are other things to consider. Does your button have a suitable accessible name? (especially if it's an icon button). If the button has the purpose of taking a person to another page, it should be a link (
The following links are great resources for helping create a great button (or link).
- A complete guide to Links and buttons on CSS-Tricks
- Links, Buttons, Submits, and Divs, Oh Hell by Adrian Roselli
<select> is a control that provides a menu of options.
<label for="select">Sort by</label>
<select id="select" name="select">
<option value="popularity">By popularity</option>
<option value="price-low-high">By lowest price</option>
<option value="price-high-low">By highest price</option>
When a person changes the option of the select, the value of it then becomes the value of the new option, nice! All browsers support this control and assistive technology support is strong too. Screen readers announce the control's accessible name (our label in this example), how to open the select menu, the list of options, and then the value when selected.
For what is an important interaction for many products, it's surprising how many custom-built “select” controls there are in the wild. This normally comes down to a few reasons, all fairly related to each other:
- The design has come through and included elements other than text in the select options (checkboxes, images, multi-select functionality)
- Select controls can be notoriously difficult to style, and the options even more so
- Rendering inconsistencies between browsers/OS: Although the functionality remains consistent, a select and its states can look very different from one browser to another and especially with their options showing
Why not fake a select though?
It is of course possible to build something that looks and behaves like a
Whilst it may be doable, let's consider a few reasons it might still be better to suggest and use the native
Future developer readability
Whilst a more custom and complex approach may make sense to one developer who has followed an example/tutorial to build the component, a developer picking up bugs/changes/feature requests in the future may not have as good of an understanding of how all the elements have been set up and what their roles are supposed to be.
Although this could be solved with sufficient documentation, it's still extra work for somebody else to get up to speed with.
When using ARIA to add a role to an element to try and improve assistive technology communication, it can often require very specific roles to be included in parent/child element relationships. If misconfigured, not only will the whole component not announce correctly, but it's breaking accessibility and might cause more problems than it was used to solve!
The more complex and ARIA-heavy these custom components are—a custom select being a good example of one that could be with enough features—the more chance of this misconfiguration happening, especially concerning the previous point of somebody with less understanding picking up changes.
Communicate with design—'shift left'
Many accessibility issues can be solved during the design phase. The barriers we create are designed in, and the more we can shift the conversation and responsibility of accessibility to earlier in the product lifecycle, the better (often referred to as shifting left).
Constant and efficient communication between designers and developers can play a huge part in this. During sessions such as a design-developer handover, or accessibility annotation pairing, it could be a great time to have a conversation about how a certain component design might lead to extra complexity, and to see if a native HTML element might be able to fit into the design.
Not only could this help educate a designer when it comes to semantics and accessibility considerations for future work, but it could also stop accessibility issues from getting to development or even to further down the line, when fixes/changes become much more expensive, or, even worse, end up unintentionally excluding people in production.
Help on the way?
The Open UI project is trying to make it easier for designers/developers to both use native controls for elements like
<select> and to have the styling and functionality freedom that often turns people to use more complex custom solutions that can be inaccessible:
The purpose of Open UI to the web platform is to allow web developers to style and extend built-in web UI controls, such as
<select>dropdowns, checkboxes, radio buttons, and date/color pickers. To do that, we'll need to fully specify the component parts, states, and behaviors of the built-in controls, as well as necessary accessibility requirements, and provide test suites to ensure compatibility. We'll also implement polyfills for our extensible web UI controls. Whilst the project is still in its infancy, concerning the
<select>element, there have been some developments with
<selectmenu>. Whilst not ready for production yet, it can be enabled in Chromium-based browsers with a flag.
<selectmenu>allows greater customisation of the select control and the options that sit inside of it.
You can read more about it in Hidde's article “One day we'll have a fully customisable select”.
Navigation allows users to complete important journeys and find the key information they may need.
HTML includes the
<nav> element. This is a landmark element and means it will automatically communicate to assistive technology that it's an element being used for navigation links (the same as adding
<li><a href="/about">About Us</a></li>
<li><a href="/history">Our History</a></li>
<li><a href="/contact">Contact Us</a></li>
This is a perfectly accessible example of some navigation. No ARIA is needed. However, navigation can often require multiple levels of nested dropdowns, and become more complex. The example can still add this and be accessible, which we will take a look at, but first let's look at a pattern often reached for when it comes to navigation with dropdowns -
Whilst the naming of
role="menu" and the child roles it requires (
role="menuitem") may suggest that it'd be perfect to use for site navigation, the purpose of it is very different. This pattern is more for replicating desktop application menus. Adrian Roselli has a superb article explaining the difference.
You can see an example of how this would be marked up on the aria authoring practices site. Whilst there are cautionary recommendations at the top of the page detailing how this is unsuitable for site navigation, the page goes on to use it for one. This is an example of how just using these resources as a copy-and-paste solution can lead to bad practices.
Going back to how we can use
<nav> and more semantic elements to start to create site navigation with multiple levels:
<li><a aria-current="page" href="#">Home</a></li>
<a href="#">About Us</a>
<!-- Visual cue icon - for example a downward facing chevron -->
<svg aria-hidden="true" focusable="false" aria-hidden="true">
<!-- Icon SVG code -->
<span class="visually-hidden">Toggle About Us submenu</span>
<li><a href="#">Our history</a></li>
<li><a href="#">Meet the team</a></li>
You might be asking “but there is ARIA in there now, and you said we didn't need any?”. This is true, but we can use ARIA in the appropriate way to enhance the experience for people using assistive technology; we just shouldn’t solely rely on its
For a more detailed guide to building a semantic and accessible navigation, check out the web.dev navigation article by Manuel.
Lists (ordered and unordered) are very common elements used on sites. They both have semantic HTML elements:
<li>Unordered list item</li>
<li>Another unordered list item</li>
<li>Yet another unordered list item</li>
- Unordered list item
- Another unordered list item
- Yet another unordered list item
<li>Ordered list item</li>
<li>Another ordered list item</li>
<li>Yet another ordered list item</li>
- Ordered list item
- Another ordered list item
- Yet another ordered list item
They can help with things such as visually and semantically breaking down complex points, and they can give expectations of important steps to complete or consider. Communicating that a list with several items (and possibly links) exists can be important to people using assistive technology; for example, it can communicate how many items are in the list.
A common mistake that can be made is to just visually represent a list with a combination of other HTML elements; for example (taken from HTMLHell):
Whilst this may visually represent a list, it is going to give people using assistive technology a very different experience. Each 'item' has no relation to the other. As it's just one paragraph element, this would give people no indication of how many items were present and how they relate in context and the order if they needed to be read sequentially.
Who would do that though?
Unordered lists were amongst the first 18 HTML tags released so why do people still ignore them over just visually representing a list? And why are they so important? Aside from poor markup choices, there could be a few other reasons for this issue occurring.
CMS WYSIWYG output
It may not be apparent to somebody how to add lists in a content management system WYSIWYG editor, thus causing them to just visually create the list of items (for example using the bullet point shown in the previous example).
Content editor skill gaps
When content editors add content in a CMS it may be that they have misunderstood that using return to add items to a newline does not create a list, but it might visually appear to look like one to them in previews, etc.
Markdown/other language confusion
In some content language formats, such as markdown, lists can be added by using the hyphen/asterisk to indicate a list item, and these are then translated into correct list markup. It could be that somebody has mistakenly tried this thinking it might be the case.
Ok, so this is an HTML-focused article, but let's not forget that CSS is amazing! What we can do with it in modern web development is incredible. It also makes being able to use semantic elements easier/more appealing if it was styling reasons they were not used for in the first place.
::marker pseudo element enables styling on the bullet point of an u
ul, whether it just be changing the colour of it, or adding custom content to it.
There's also the
@counter-style rule. This enables the usage of non-standard bullet types but also can convert this to a string, meaning better accessibility considerations.
For ordered lists the counter reset property can help with custom styling numeric counters.
Slight tangent incoming!
Educating content editors on using semantic markup can be an important part of ensuring that semantic, accessible content is being added to a site. Despite designing and building an accessible experience, this work could be undone by fundamental knowledge gaps when adding content such as blog posts, case studies, etc if they are handled through a CMS. Link text, image alt text, heading structure, correct element usage, etc. can all have detrimental effects on a person's experience.
If the importance of using semantic and accessible elements and structure is lost on somebody, it can be useful to remind people that it can have many benefits; for example, SEO and readability. Jeremy Keith has an interesting thought on doing the right things for the wrong reason.
End of tangent.
Lists and Safari "list"-itis
Something to consider when using lists and testing behavior with iOS/MacOS and Safari and VoiceOver, is the removal of default styles (
list-style: none;). With this combination of OS and browser, this style will remove the semantics using the
<ol> element provides. The reasoning behind this comes from the overuse of lists to mark components up.
A bug was filed for this 'issue' which prompted the following response:
This was a purposeful change due to rampant “list”-itis by web developers. … Basically, if you remove all default visible indication of the list, there is no indication to a sighted user or screen reader user that the content is a list. If you want to override this heuristic for accessibility, you can always add an explicit ARIA role=”list”. As suggested to get around this, you can explicitly add a role to the element:
<!-- List items -->
Although this seems verbose (it'll also get flagged when validating HTML) and is an extra thing to remember, it'll make the experience much better for people using VoiceOver and encountering a list.
Note: This is not needed when the
ul is the child of a
nav landmark element. In this case the semantics of the list elements are preserved(disclaimer: links to a Twitter thread), even if default styling is removed. Another great reason to make sure navigation is marked up semantically and accessibly.
So still announce list semantics if list was custom styled.
<li><a href="/about">About Us</a></li>
<li><a href="/history">Our History</a></li>
<li><a href="/contact">Contact Us</a></li>
Forms are a critical part of many journeys on a site, but yet they are so often marked up inaccessibly or use patterns that do not take user needs into account. There are also many examples I've seen where native elements have been ignored in favor of overly complex solutions.
<legend> elements are a great way to break up more complex forms, and can greatly improve the flow and experience of filling a form out for many people:
<legend>How would you like to hear from us?</legend>
<!-- Checkboxes with selection options -->
<fieldset> element implicitly communicates a role of
group—useful for grouping logically related items-and the
<legend> provides the 'caption' or accessible name for it thus, communicating to assistive technology such as screen readers that the fields within are related and providing a label to announce.
Here's an example seen recently on a documentation site of using non-semantic elements to do this:
<div role="group" aria-labelledby="my-radio-group">
<Field type="radio" name="picked" value="One" />
<Field type="radio" name="picked" value="Two" />
This would result in a very similar experience to the fieldset and legend pattern but is just doing more work to get there. It's using non-semantic elements and using ARIA to turn them into something that can be done natively!
The issue with examples like this being included on documentation sites is that it runs the risk of being copied and pasted as an example, and then becoming habits in that codebase.
Other benefits native elements can offer would also have to be manually handled; for example,
<fieldset> can take a
disabled attribute, which would make all child input controls disabled.
Other form element tips
OK, so these do push this article over the 5 elements specified in the title. However, due to the number of times these issues come up on forms, and how low-hanging, high-impact they can be to fix, let's quickly mention them.
Accessible input names
Don't rely solely on placeholder attributes for input controls that require people to enter text/numbers etc. These can often fail colour contrast requirements, have patchy support for assistive technology, and aren't translated if internationalisation is required.
One solution could be to add an
aria-label to the control, as this would provide an accessible name; however, even better would be to include an associated visual label for the control. This has benefits for many user groups.
Do also try to steer clear of the 'floating label' pattern. Although it does seem to strike a great balance between the designed 'placeholder' look and having a label, it can often introduce accessibility issues of its own, such as hard-to-read text and leaving the input feeling crowded.
Ensure that colour alone is not being relied on to convey meaning in validation messaging. It can be nice UX (user experience) to include a suitable icon along with the message, for example, an exclamation with an error. If this can't be achieved, ensure messaging is well-written.
Make sure that the messaging is suitably announced to assistive technology. This can be done via an ARIA live region. When we think about errors associated with inputs, in particular, not having this surfaced immediately could create barriers for people relying on using a form to complete a journey/access a vital service.
Note: Although live regions are a great idea for important or time sensitive content like form errors. Be careful overusing it, it can become very 'noisy' and disruption on a person's journey.
When reviewing a design, consider if you might be able to use a native HTML element to achieve the functionality, or consider having a conversation with design to see if something could change to allow you to do so. Communications such as accessibility annotation sessions can be useful for this.
Some useful links to help learn more about using semantic and accessible HTML. Also how to use ARIA responsibly if needed.
- web.dev - learn HTML
- web.dev - learn accessibility
- Why semantics matter—reasoning and examples, should you need it
- Inclusive Components—progressive, robust, semantic, and accessible common component patterns from Heydon Pickering
- Using ARIA—including the 5 rules of ARIA
- ARIA authoring practices guide
About James Bateson
James is a Front End Designer based in Manchester, UK at Code Computerlove. With a passion for, and interest in; HTML, CSS, accessibility, performance, and UX.