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How to Section Your HTML

June 18th, 2019 admin Leave a comment Go to comments

, and

. is also kind of a sectioning element since all content lying inside of it is part of the default document section.

Here is a brief explanation of each sectioning element and how they are used:

– Equivalent to role="navigation". Major site navigation that consistently appears frequently across the site. Examples include the primary navigation, secondary navigation, and in-page navigation.
– Equivalent to role="complimentary". Content that is only tangentially related (or not related) to the main content. Think of something like a sidebar with supplementary information, a note within an article, or the outer container for a list of related articles at the bottom of a blog post.
– Equivalent to role="article". Content that is self-contained in that it makes sense on its own when taken out of context. That could mean a widget, a blog post or even a comment within a blog post.
– Equivalent to role="region". Content that needs extra context from its parent sectioning element to make sense. This is a generic sectioning element that is used whenever it doesn’t make sense to use the other more semantic ones.

This is a very long article that I suspect you will want to come back to and reference multiple times. To make that easier, here is a list of all the article headings:

Jump to article heading

When to use

The

element only ever needs to be used once per navigation block. Sub-navigation that is already contained inside a

element does not need to be wrapped in a second

element.

<nav aria-label="Primary">
  <ul>
    <li><a href="#">Primary link</a></li>
    <li><a href="#">Primary link</a></li>
    <li>
      <a href="#">Primary link</a>
      <!-- <nav> element is *not* needed again here -->
      <ul>
        <li><a href="#">Secondary link</a></li>
        <li><a href="#">Secondary link</a></li>
      </ul>
    </li>
  </ul>
</nav>

The

element is intended for only major navigation blocks. “Major” is a very subjective term though. html5doctor.com has a pretty good explanation of when it is and isn’t appropriate to use

, keep in mind that the following are opinions and not official W3C rulings:

The key phrase is ‘major’ navigation. We could debate all day about the definition of ‘major’, but to me it means:

Primary navigation

~~Site search~~

Secondary navigation (arguably)

In-page navigation (within a long article, for example)

While there isn’t any right or wrong here, a straw poll coupled with my own interpretation tells me that the following shouldn’t be enclosed by
:

Pagination controls

Social links (although there may be exceptions where social links are the major navigation, in sites like About me or Flavours, for example)

Tags on a blog post

Categories on a blog post

Tertiary navigation

Fat footers

— html5doctor.com (strikethrough mine)

Breadcrumbs are another piece of content that should be wrapped in a

element as evidenced by this W3C breadcrumb HTML example.

A
is unnecessary around a search form

I disagree with HTML5 Doctor’s opinion that a site search form should be wrapped in a

element (thus why I crossed it out).

is intended to be wrapped around navigation links, not a form. The site search actually has its own special role that defines it as a search landmark. If you add role="search" to the search element, it is announced to screen reader users as a search landmark. Screen reader users will also be able to navigate to it when navigating via landmarks. If there are multiple search forms on the page, they should be differentiated using aria-label or aria-labelledby (more details on these attributes later). Don’t include the word “search” in the aria label though — that’s like saying “image of” in image alt text; it’s unnecessary. Instead, focus on what the search form is searching through. So, for the global site search, giving it aria-label="site" would be appropriate.

<!-- <nav> is not needed on a search form. -->
<!-- role="search" is enough -->
<form role="search" aria-label="site">
  <label>
    <span>Search</span>
    <input type="search" />
  </label>
  <buton type="submit">Submit</button>
</form>

A role="search" form won’t appear in a document outline but I think this is okay considering search forms are often small and self-contained. It still gets the majority of benefits that you get from using sectioning elements. Adding a sectioning element to the mix bombards the screen reader user with messages telling them that it is a search form (one for the sectioning element, one for the search role, and one for the search input label).

Don’t use the word “nav” or “navigation” in the label

Like with role="search", adding “navigation” to the label of a

element only results in a screen reader saying “navigation” twice.

<nav aria-label="primary navigation">
  <!-- Screen reader: "primary navigation navigation landmark" -->
</nav>

<nav aria-label="primary">
  <!-- Screen reader: "primary navigation landmark" -->
</nav>

Questions to ask yourself

That same HTML5 Doctor article lists two questions that you can ask yourself to help you figure out if something should be wrapped in a

or not:

Would another sectioning element also be appropriate? If yes, maybe use that instead.
Would you add a link to it in a “skip to” block for accessibility? If not, then it might not be worth using a
element.

In those cases where the navigation is too minor to justify the use of the

element,

is most likely the element that you should use instead.

A
doesn’t have to be a list of links

The most common use case for a

is to wrap it around a list of links but it doesn’t have to be a list of links. If your navigation works in a different sort of way, you can still use the

element.

<!-- Example taken from the <nav> element specification -->
<!-- https://html.spec.whatwg.org/multipage/sections.html#the-nav-element:the-nav-element-5 -->
<nav>
  <h1>Navigation</h1>
  <p>You are on my home page. To the north lies <a href="/blog">my
  blog</a>, from whence the sounds of battle can be heard. To the east
  you can see a large mountain, upon which many <a
  href="/school">school papers</a> are littered. Far up thus mountain
  you can spy a little figure who appears to be me, desperately
  scribbling a <a href="/school/thesis">thesis</a>.</p>
  <p>To the west are several exits. One fun-looking exit is labeled <a
  href="https://games.example.com/">"games"</a>. Another more
  boring-looking exit is labeled <a
  href="https://isp.example.net/">ISP™</a>.</p>
  <p>To the south lies a dark and dank <a href="/about">contacts
  page</a>. Cobwebs cover its disused entrance, and at one point you
  see a rat run quickly out of the page.</p>
</nav>

In this same vein, it’s okay to have small bits like intro text in the

element as long as the primary focus of the content is on the navigation links. Introductory content is best placed inside a

in the

element. I’ll go into more depth on headers and footers later.

<nav>
  <header>
    <h2>In this section</h2>
    <p>This is some intro text describing what you will find in this section.</p>
  </header>
  <ul>
    <li><a href="#">Sub section one</a></li>
    <li><a href="#">Sub section two</a></li>
  </ul>
</nav>

Avoid nesting an
inside an

In the same way that

shouldn’t really ever be nested inside another

element,

elements also tend not to be nested inside each other.

is used to represent content that is tangentially related to the content around it. That means placing an aside inside an aside is basically announcing a tangent away from something that in itself is a tangent away from the main content.

<!-- Don't do this -->
<aside aria-label="Side bar">

  <aside>
    <h2>Share</h2>
    <ul>
      <!-- List of social media links -->
    </ul>    
  </aside>

  <aside>
    <h2>Recommendations:</h2>
    <ul>
      <li>
        <article>
          <h2><a href="#">Related article title</a></h2>
          <p>Article description</p>
        </article>
      </li>
      <!-- List of recommended articles continues -->
    </ul>
  </aside>

</aside>

If you have a sidebar that has multiple sections, don’t nest

elements inside of

elements like in the example above. Instead, make the sidebar a single

and then use

(or another appropriate sectioning element) to create the different sections.

<!-- Do this instead -->
<aside aria-label="Side bar">

  <section>
    <h2>Share</h2>
    <ul>
      <!-- List of social media links -->
    </ul>    
  </section>

  <section>
    <h2>Recommended articles:</h2>
    <ul>
      <li>
        <article>
          <h2><a href="#">Related article title</a></h2>
          <p>Article description</p>
        </article>
      </li>
      <!-- List of recommended articles continues -->
    </ul>
  </section>

</aside>

Article is like “Block”; Section is like “Element”

and

are easy to get confused with one another. If you are familiar with “Block Element Modifier” (BEM) syntax, then an easy way to think of the difference between the two is that an

is a bit like the “B” (or “Block”) in BEM. It is a container that stores self-contained content that still makes sense when placed in a different context. Individual tweets on Twitter and each list item on a search results page would be considered

elements.

is like the “E” (or “Element”) in BEM. It is a sub-section that requires context from its parent sectioning element to make sense.

is a generic catch-all sectioning element that you use when it doesn’t make sense to use the other sectioning elements. So, if in doubt, go with

Note that if something is styled as a “Block” in BEM, that doesn’t automatically mean that it is an

element. Same goes for BEM “Elements” and

elements. The element of something should be based on the meaning of the content, not how the content looks.

Comments sections

Something that may surprise people is that individual comments on a blog post are also considered articles, even though they are in reply to the main blog post. The

element wrapping around the main blog post should also wrap around the comments section though. This is to represent that the comments go with the main article.

<article>
  <h1>I am an awesome blog post!</h1>
  <p>I am some body text content.</p>

  <section>
    <h2>Comments</h2>
    <ul>
      <li>
        <article>
          <h2>Username</h2>
          <p>This is the comment body text.</p>
          <footer>
            <p>
              Meta data like post date makes sense
              in either the header or the footer.
            </p>
          </footer>
        </article>
      </li>
    </ul>
  </section>
</article>

Don’t swap
for

Just because we have these fancy sectioning elements now, it doesn’t mean that the good old

element has lost all of its usefulness.

has no semantic meaning, so it is quite useful whenever we are altering the HTML purely for the sake of styling purposes.

Let’s say that we have a blog post contained inside an

element that we need to wrap in something for the sake of styling purposes.

<!-- I need a wrapper element -->
<article>
  <h1>I am a blog post</h1>
  <p>I am some content</p>
</article>

Reaching for the

element in this circumstance is not the right thing to do.

<!-- Do not do this -->
<section class="wrapper">
  <article>
    <h1>I am a blog post</h1>
    <p>I am some content</p>
  </article>
</section>

Though

is technically a generic element,

is the far more appropriate option in this circumstance. This new wrapping container is not meant to have any semantic meaning behind it and that is exactly what

is designed to be used for.

<!-- Use a <div> if the element is only used for styling purposes -->
<div class="wrapper">
  <article>
    <h1>I am a blog post</h1>
    <p>I am some content</p>
  </article>
</div>

Another way to remember this: if you can’t think of a meaningful heading to apply to a

, then it probably shouldn’t be a

Headers and footers

Although they don’t necessarily need to, sectioning elements may contain a single

and a single

with the header being at the top of the section and the footer being at the bottom.

Sectioning elements can be nested inside one another as many times as is needed based on the content.

The header and footer in a sectioning element can also contain sectioning elements.

The one major restriction around nesting sectioning elements is that headers and footers cannot be nested inside other headers and footers.

Nesting headers and footers inside one another is not allowed.

What goes inside headers?

Headers are used for introductory content. Appropriate things to include in

elements include (but are not limited to):

The heading element (
–
)
An introductory paragraph or statement.
A profile picture
A logo
A search form
Primary navigation
Author’s name
Post/updated date
Meta data
Social media links

What goes inside footers?

Footer elements primarily hold things like meta data and minor supporting content. Appropriate things to include in

elements include (but are not limited to):

Copyright information
Legalities
Footnotes
Low priority site navigation
Author’s name
Post/updated date
Meta data
Social media links

You will notice that there is some cross over between the header and the footer in terms of content that is appropriate to both. This is mostly because meta-type content fits well in either element. It mainly comes down to the design that you are trying to achieve.

elements do tend to signify that the content inside of them is of greater importance than the content inside of a

element though.

Sectioning elements and the document outline algorithm

An important thing to know about these sectioning elements is that they are all supposed to feature a element inside of them (or be labeled in some other way, but more on that later). This is primarily for the sake of something called the document outline algorithm. This is an algorithm that uses sectioning elements to help determine what level a heading () should be without having to rely exclusively on the number that the developer has provided. So, have you ever wondered whether or not it’s okay to have more than one

on a page? This is meant to make that a non-issue (but hold on for a sec, because there is more to the story).

<!-- No Document outline algorithm -->
<article>
  <h1>Primary heading</h1>

  <h2>Secondary heading</h2>
  <p>Some text.</p>

  <h3>Tertiary heading</h3>
  <p>Some text.</p>
</article>

<!-- With document outline algorithm -->
<article>
  <h1>Primary heading</h1> <!-- Recognized as <h1> -->
  
  <!-- sectioning element sets new heading level context -->
  <section>
    <h1>Secondary heading</h1> <!-- Recognized as <h2> -->
    <p>Some text.</p>

    <h2>Tertiary heading</h2> <!-- Recognized as <h3> -->
    <p>Some text.</p>
  </section>

</article>

There is a lot more to learn about the document outline algorithm. I’ll stop here though because…

No browser supports the document outline algorithm

There is not a single browser that supports this method of creating a heading structure. This is a shame. It would make building accessible websites much easier if we didn’t have to worry so much about using the correct heading level all the time.

As far as I’m aware, there are two main reasons why no browser has implemented the algorithm. One is that browser vendors are afraid of breaking the heading structure of sites that have used sectioning elements incorrectly. The other reason is that the current document outline algorithm spec is difficult to implement and no browser vendor has been willing to put the time into implementing it yet.

In reference to the first reason, there is a long discussion about incorporating a new element instead of using the

element to tell browsers to use the document outline algorithm. I was in favor of this new element idea until I realized that an attribute on the element or adding a tag to the would work even better as a means of telling browsers it was safe to use the algorithm. It is also better for headings to fall back to a

in unsupported browsers than falling back to a .

If you would like to play around with this concept though, there is a plugin called hfill. It allows you to nest headings inside sectioning elements to create the document outline without having to worry about heading levels so much. There is a demo available for you to try it out. The major flaw in this plugin though is that the only way to increment heading levels is by nesting sectioning elements inside one another. There is no

-is-greater-than-

dynamic in this plugin which is the main reason I fell out of love with this element idea. This lack of heading hierarchy would make CMS rich text editors far too difficult for clients to use.

As for the issue around implementation difficulty, work is being done to produce a simplified spec that browser vendors are more likely to adopt. The document outline algorithm has been in the HTML specifications for years. Hopefully this simplified spec will allow the algorithm to become a reality.

Although the algorithm is not supported anywhere yet, we can still build with the algorithm in mind. If we build with it in mind, then we gain the following benefits:

We future-proof our sites in case the algorithm ever does get implemented.

We can significantly improve the user experience for screen reader users.

We potentially improve search engine optimization (SEO) due to search engines being able to better understand the site’s content.

We can create a better user experience for users by allowing them to use native browser features that make use of sectioning elements, like Reader Mode.

Sectioning content

Take a look at this mock-up layout I put together and think about how you might split it up into sections.

This is how I would split the layout up into sectioning elements (only the solid lines represent sectioning elements).

In terms of HTML markup, it looks like this:

<body>

  <header>
    <a href="/" title="Go to home page">
      <img src="logo.png" alt="Site logo">
    </a>
    <nav>
      <ul>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
      </ul>
    </nav>
    <form role="search" aria-label="site">
      <label>
        <span>Search</span>
        <input type="search"/>
      </label>
      <button type="submit">Submit</button>
    </form>
  </header>

  <nav>
    <ul>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
    </ul>
  </nav>

  <main>
    <article>
      <h1>Main article heading</h1>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quae sunt igitur communia vobis cum antiquis, iis sic utamur quasi concessis; Nihil acciderat ei, quod nollet, nisi quod anulum, quo delectabatur, in mari abiecerat. Unum est sine dolore esse, alterum cum voluptate. Laboro autem non sine causa; Theophrasti igitur, inquit, tibi liber ille placet de beata vita? Nihil opus est exemplis hoc facere longius. Duo Reges constructio interrete. Graecum enim hunc versum nostis omnes Suavis laborum est praeteritorum memoria. Haec et tu ita posuisti, et verba vestra sunt.</p>

      <h2>Article secondary heading</h2>
      <p>Nos commodius agimus. A mene tu? Tantum dico, magis fuisse vestrum agere Epicuri diem natalem, quam illius testamento cavere ut ageretur. Tenesne igitur, inquam, Hieronymus Rhodius quid dicat esse summum bonum, quo putet omnia referri oportere? Nihilo beatiorem esse Metellum quam Regulum. Sed quanta sit alias, nunc tantum possitne esse tanta. Philosophi autem in suis lectulis plerumque moriuntur. Esse enim, nisi eris, non potes.</p>
      <p>Sunt enim quasi prima elementa naturae, quibus ubertas orationis adhiberi vix potest, nec equidem eam cogito consectari. Id Sextilius factum negabat. Quorum sine causa fieri nihil putandum est. Quae autem natura suae primae institutionis oblita est?</p>
    </article>
  </main>

  <aside>
    <section>
      <h2>Share</h2>
      <ul>
        <li><a href="#">Facebook</a></li>
        <li><a href="#">Twitter</a></li>
        <li><a href="#">Email</a></li>
      </ul>
    </section>
    <section>
      <h2>Recommended</h2>
      <ul>
        <li>
          <article>
            <h3><a href="#">Related article</a></h3>
            <p>Article description</p>
          </article>
        </li>
        <li>
          <article>
            <h3><a href="#">Related article</a></h3>
            <p>Article description</p>
          </article>
        </li>
      </ul>
    </section>
  </aside>

  <footer>
    <ul>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
    </ul>
  </footer>

</body>

The element

There is a very important semantic element that I used in the markup above that I haven’t covered yet and that is the element. The element represents the primary content of the page. It is not supposed to feature any side bars or navigation elements in it. You also must not have more than one element on the page unless all other elements on the page have a hidden attribute applied to them (this is for the sake of SPAs).

The element is not a sectioning element. This means that it doesn’t help contribute to the document outline algorithm and it can’t feature a

element as a direct child. It is a landmark element though so screen reader users are able to navigate to it quite easily.

I’m not 100% sure if using

in the element like I have done above is necessary. Semantically, it does make sense. The main content is self-contained, thus justifying use of the

element in this way. From a document outline algorithm perspective, the

element also helps with the document structure.

From a usability point of view, it feels a bit unnecessary and the document outline algorithm doesn’t even work anywhere at the moment. I’m going to continue using it throughout my examples but I would be interested to know what other people think about this in the comments section.

You need to label your sections. Here are three methods.

I am going to be saying the word “label” a lot throughout this article. Keep in mind that I am not talking about the element. The element is not used to label sectioning elements.

Sectioning elements require labels so that screen reader users are able to quickly identify what content they can find inside that particular section of the site. I consider using sectioning elements without providing associated section labels as an accessibility fail, unless it is the only one of its type on the page. It is also recommended that the exact same label text not be used on multiple sectioning elements (or heading elements). This makes each section more recognizable to screen reader users which helps them navigate the site more easily.

There are three ways to label a sectioning element. In the following examples, I refer to “transport” and “portability” as a way of explaining how easy it is to save the section into a component and use that component multiple times in multiple different contexts.

I also provide lists of positives and negatives in the examples as well. In these lists, I assume that you want the section label to be readable by screen readers but hidden from sighted users.

Method 1: Add an aria-label attribute

This is the quickest and easiest way to label a sectioning element.

<section aria-label="Label for this section">
  <p>Content for this section</p>
</section>

#The aria-label translation issue

The main draw back of aria-label (at the time of writing) is that most browsers are unable to translate these values for users who speak a different language than you. The developers at Google recently fixed this bug in Chrome, however this is still a problem for every other browser.

If your website has a large international audience or you know that many of your users do not speak your language, you should probably avoid using this attribute until all browsers support the translation of this property. If you don’t have those sorts of users, it’s pretty safe to assume that the non-sighted users viewing your site are able to understand your language — well enough to be able to navigate your site, anyway.

If you need more convincing, let’s say your site has very few international users. That means your users generally come from the same country as you. If they come from the same country then they are likely to speak the same language as you, so there is already a fairly small percentage of your users that don’t understand the native language of your site. Now take into account that aria-label only affects screen reader users. That is now only a fraction of an already small percentage of your users who will experience the issue. And now consider that Chrome (by far the most popular browser in the world) now supports translation of the aria-label attribute. The user has to also not be using an up to date version of Chrome as their browser for the translation issue to be a problem. If you factor all of that together, it is highly probable that you may not have any users who are both able to perceive the aria-label attributes and are incapable of comprehending what they say. This makes me feel like the bad multi-lingual support in aria-label isn’t really worth worrying that much about unless you have a large international audience or you have many users that you know do not speak your language.

#Positives

Super quick and easy to implement.
Doesn’t affect heading structure.
Makes components easy to transport.
Is invisible to sighted users.

#Negatives

Not translated into other languages in non-Chrome browsers (at time of writing).
Often not supported by page structure analysis tools.
Confusion can arise from not knowing what level other headings inside the section should be at.

Method 2: Add a element to it

By I mean

, or

depending on what makes sense. Adding a heading to a sectioning element is a quick way to label it.

#Heading placement

The heading can be placed either directly in the sectioning element, like this:

<section>
  <h1>Heading</h1>
  <p>content</p>
</section>

…or placed inside the

element:

<section>
  <header>
    <h1>Heading</h1>
    <p>I'm a byline</p>
  </header>

  <p>Content</p>
</section>

You can also place as many

wrapper elements between the sectioning element and the heading as you want.

<!-- This is perfectly fine -->
<section>
  <div>
    <header>
      <div>
        <h1>Heading</h1>
        <p>I'm a byline</p>
      </div>
    </header>

    <p>Content</p>
  </div>
</section>

#Only one heading of the highest level per sectioning element

There should really only be one heading of the highest level in a sectioning element. The spec says that when there are multiple top level headings or headings of a higher level than the first, the browser is supposed to close the previous sectioning element and start a new one of the same type.

The first element of heading content in an element of sectioning content represents the heading for that explicit section. Subsequent headings of equal or higher rank start new implied subsections that are part of the previous section’s parent section. Subsequent headings of lower rank start new implied subsections that are part of the previous one. In both cases, the element represents the heading of the implied section.

—HTML 5.3, Headings and Sections

In reality, the browser uses the first heading as the section label but these implied sections are never created. It just announces the heading as is when it encounters it. It’s not earth-shatteringly bad but it is somewhat confusing.

<!-- Avoid this: -->
<section>
  <h2>Heading level two labeling a section</h2>
  <p>Content</p>

  <!-- Don't use same level or higher headings as the one labeling the section -->
  <h2>This is also a heading level two</h2>
  <p>Content</p>
</section>


<!-- Do this instead: -->
<div>
  <section>
    <h2>Heading level two labeling a section</h2>
    <p>Content</p>
  </section>
  <section>
    <h2>Heading level two labeling a different section</h2>
    <p>Content</p>
  </section>
</div>

#The heading always comes first

If a sectioning element has a element, that top level heading should always be the very first piece of content inside that sectioning element. Failing to do so counts as an accessibility fail.

If you find yourself needing to place content before your heading (like an image, for example), you can use Flexbox to rearrange the visual order. This will allow it to look like the image comes before the heading but in the markup the heading comes before the image. There is a bug in IE that will sometimes cause text to not wrap in a flex-direction: column; element. You can work around this issue by applying a max-width to the flex-child element.

<!-- Don't do this -->
<section>
  <img src="image.jpg" alt="Don't place content or images before the heading" />
  <h2>Headings should always come first</h2>
  <p>Place regular content after the heading</p>
</section>

<!-- Do this instead -->
<section class="example">
  <h2>Headings should always come first</h2>
  <img src="image.jpg" alt="Don't place content or images before the heading" />
  <p>Place regular content after the heading</p>
</section>

<style>
.example {
  display: flex;
  flex-direction: column;
}
.example img {
  order: -1;
}
</style>

Note that rearranging the visual order to satisfy WCAG Guideline 1.3.2: Meaningful Sequence can conflict directly with WCAG Guideline 2.4.3: Focus Order. For example, if that image is a link to an article and the heading you are placing it above is also a link to the article, placing the heading first breaks the focus order. Placing the image first breaks the meaningful sequence.

In situations like this where these two guidelines conflict with one another, my opinion is that the 1.3.2: Meaningful Sequence guideline is the more important guideline to follow if you aren’t able to resolve the conflict in some way. Failing focus order leads to the user suffering a moment of discomfort as they are tabbing through the content and focus is sent to an unexpected location. Failing to follow a meaningful sequence leads to a confused user unsure of the relationship between different bits of content.

#Making visually hidden section labels out of headings

Headings are visible to sighted users by default. This makes them super useful if you want the heading to be visible. A lot of the time, we don’t want the label for our sectioning element to be visible though. In order to stop our sighted users from seeing the label, we need to use some CSS.

<style>
.visually-hidden {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
</style>

<section>
  <h1 class="visually-hidden">Heading</h1>
  <p>content</p>
</section>

#Headings are well-supported by structure analysis tools

Headings also have a huge advantage for developers in that any page structure analysis tool that you can find will have support for them. This makes heading structures easy to test and debug. The other two section labeling methods have very poor support in testing tools. Not even the official W3C Validator service supports the alternatives at the moment. I posted an issue to have this fixed — please consider helping to fix the issue if you are good at coding in Java.

#Positives

Quick to implement.
Reliably appears in page structure analysis tools making it easy to test and debug.
All browsers will translate the text into other languages.
No confusion over what level other headings inside the section should be.

#Negatives

Affects document heading structure.
Need to ensure that the heading is at the correct level before use.
Visible to the user by default.
Requires CSS to hide the heading from visual users.
Can make components less portable due to heading structure requirements.

Method 3: Use an aria-labelledby attribute

This is what it looks like to create a hidden section label using aria-labelledby.

<section aria-labelledby="unique-id">
  <div hidden id="unique-id">Label for this section</div>
  <p>Content for this section</p>
</section>

#Labels can be hidden without CSS

Note that I used the hidden attribute in the example to hide the div rather than a visually-hidden CSS class. aria-labelledby is able to read out text that is normally hidden from screen reader users. This adds the bonus effect of preventing the text from being read out twice by the screen reader. Don’t use the aria-hidden attribute though. Screen readers will not find the label text. Well, NVDA couldn’t find the label text when I tested it. I’m not sure about other screen readers.

#Major portability issue

aria-labelledby is the most difficult to use out of all the section labeling methods. The main aspect that makes it difficult to use is that the aria-labelledby attribute works off IDs. Things always get more complicated whenever IDs are involved. This is due to web pages only being allowed to have a single instance of an ID on the page at any one time. This makes component portability difficult.

Due to this portability issue, I would really only recommend this option if you need to support a multi-lingual audience and don’t want to mess around with the heading structure.

#No need to place the label near the sectioning element

You don’t need to place the element with the label text inside or near the section element that it labels. The text for the label can be placed in a completely different location to the sectioning element. This is thanks to the ID linking the two elements together. I’m not necessarily saying that it is a good idea to do this, but it is a feature of aria-labelledby that you should be aware of.

<div hidden id="unique-id">Label for this section</div>

<!-- 1,000 lines of other HTML -->

<section aria-labelledby="unique-id">
  <p>Content for this section</p>
</section>

#Turn non-heading elements into section labels

There is one other key reason you may want to use aria-labelledby. If you have a visible non-heading element on the page that you want to use as the label for a section, aria-labelledby is perfect for this. A

element inside a

is a common use case for this. This doesn’t mean that you have to wrap fieldsets in sectioning elements. I’m just pointing it out in case you spot a need for it.

<section aria-labelledby="section_label">
  <fieldset>
    <legend id="section_label">
      I am both the fieldset legend and the section label
    </legend>

    <!-- Form fields go here -->
  
  </fieldset>
</section>

#Positives

All browsers will translate the text into other languages.
Can assign a non-heading element as the section label.
Text for the label does not need to be placed near the section it is labeling.

#Negatives

Requires the use of IDs to work.
Difficult to transport.
It can potentially be difficult to track down where the text for the label is stored in your source code.
Text is visible by default unless a hidden attribute is used.
Text might get read out twice by some screen readers if the text is not hidden.
Confusion can arise from not knowing what level other headings inside the section should be at.

Only use one method at a time

Don’t use a , an aria-label and/or an aria-labelledby attribute at the same time on the same sectioning element. Only every use one labeling method at a time for each sectioning element. Using multiple methods is super confusing and leads to the label being overwritten. It’s a bit like declaring the same property twice in CSS. I wasn’t sure how a screen reader would actually handle this so I created the most ridiculous

ever and ran it through NVDA.

<!-- Don't do this -->
<section aria-label="Is this the section label?" aria-labelledby="is_this_the_label">
  <h1>Or is this the section label?</h1>
  <p id="is_this_the_label">Only ever use one at a time.</p>
</section>

This is the order of priority that NVDA gave to the various labeling methods from strongest to weakest:

aria-labelledby
aria-label

Adding section labels to our example layout

For a long time, I used headings as the only means of labeling sections. The poor multi-lingual support provided by aria-label scared me; and aria-labelledby was far too cumbersome to be my primary labeling method. We run into a bit of an issue though if we use only headings to label sections. I’ll show you what I mean.

<style>
  .visually-hidden {
    position: absolute;
    opacity: 0;
    pointer-events: none;
  }
</style>

<body>

  <header>
    <a href="/" title="Go to home page">
      <img src="logo.png" alt="Site logo">
    </a>
    <nav>
      <h2 class="visually-hidden">Primary</h2>
      <ul>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
      </ul>
    </nav>
    <form role="search" aria-label="site">
      <label>
        <span>Search</span>
        <input type="search"/>
      </label>
      <button type="submit">Submit</button>
    </form>
  </header>

  <nav>
    <h2 class="visually-hidden">Secondary</h2>
    <ul>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
    </ul>
  </nav>

  <main>
    <article>
      <h1>Main article heading</h1>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quae sunt igitur communia vobis cum antiquis, iis sic utamur quasi concessis; Nihil acciderat ei, quod nollet, nisi quod anulum, quo delectabatur, in mari abiecerat. Unum est sine dolore esse, alterum cum voluptate. Laboro autem non sine causa; Theophrasti igitur, inquit, tibi liber ille placet de beata vita? Nihil opus est exemplis hoc facere longius. Duo Reges constructio interrete. Graecum enim hunc versum nostis omnes Suavis laborum est praeteritorum memoria. Haec et tu ita posuisti, et verba vestra sunt.</p>

      <h2>Article secondary heading</h2>
      <p>Nos commodius agimus. A mene tu? Tantum dico, magis fuisse vestrum agere Epicuri diem natalem, quam illius testamento cavere ut ageretur. Tenesne igitur, inquam, Hieronymus Rhodius quid dicat esse summum bonum, quo putet omnia referri oportere? Nihilo beatiorem esse Metellum quam Regulum. Sed quanta sit alias, nunc tantum possitne esse tanta. Philosophi autem in suis lectulis plerumque moriuntur. Esse enim, nisi eris, non potes.</p>
      <p>Sunt enim quasi prima elementa naturae, quibus ubertas orationis adhiberi vix potest, nec equidem eam cogito consectari. Id Sextilius factum negabat. Quorum sine causa fieri nihil putandum est. Quae autem natura suae primae institutionis oblita est?</p>
    </article>
  </main>

  <aside>
    <h2 class="visually-hidden">Sidebar</h2>
    <section>
      <h3>Share</h3>
      <ul>
        <li><a href="#">Facebook</a></li>
        <li><a href="#">Twitter</a></li>
        <li><a href="#">Email</a></li>
      </ul>
    </section>
    <section>
      <h3>Recommended</h3>
      <ul>
        <li>
          <article>
            <h4><a href="#">Related article</a></h4>
            <p>Article description</p>
          </article>
        </li>
        <li>
          <article>
            <h4><a href="#">Related article</a></h4>
            <p>Article description</p>
          </article>
        </li>
      </ul>
    </section>
  </aside>

  <footer>
    <ul>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
    </ul>
  </footer>
</body>

If we look at our heading structure now, it will look like this (italics = visually hidden; bold = visible):

- Primary [nav]
- Secondary [nav]
Main article heading
- Article secondary heading
- Sidebar
  - Share
  - Recommended
    
    Related article
    
    Related article

Notice that our

heading isn’t at the top of the list? It really doesn’t feel right having two

headings above the

heading.

This form of heading structure is actually allowed by the W3C so it doesn’t count as an accessibility fail. I still think that this is a pretty bad UX for screen reader users though. It is not a logical progression from

. It makes the most sense if the first heading you encounter on the page is a

then progress into

then

and so on.

Making Heading 1 be the first heading

For a very long time, I thought the absolute best way to handle this conundrum was to make the

visually hidden and have it be the very first piece of content on the page. The thing that everyone thinks is the

actually becomes a

This is what that sort of structure looks like in practice:

<style>
  .visually-hidden {
    position: absolute;
    opacity: 0;
    pointer-events: none;
  }
</style>

<!-- Don't do this -->
<body>
  <header>
    <h1 class="visually-hidden">Main article heading</h1>
    <a href="/" title="Go to home page">
      <img src="logo.png" alt="Site logo">
    </a>
    <nav>
      <h2 class="visually-hidden">Primary</h2>
      <ul>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
      </ul>
    </nav>
    <form role="search" aria-label="site">
      <label>
        <span>Search</span>
        <input type="search"/>
      </label>
      <button type="submit">Submit</button>
    </form>
  </header>

  <nav>
    <h2 class="visually-hidden">Secondary</h2>
    <ul>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
    </ul>
  </nav>

  <main>
    <article>
      <h2><span class="visually-hidden">Body:</span> Main article heading</h2>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quae sunt igitur communia vobis cum antiquis, iis sic utamur quasi concessis; Nihil acciderat ei, quod nollet, nisi quod anulum, quo delectabatur, in mari abiecerat. Unum est sine dolore esse, alterum cum voluptate. Laboro autem non sine causa; Theophrasti igitur, inquit, tibi liber ille placet de beata vita? Nihil opus est exemplis hoc facere longius. Duo Reges constructio interrete. Graecum enim hunc versum nostis omnes Suavis laborum est praeteritorum memoria. Haec et tu ita posuisti, et verba vestra sunt.</p>

      <h3>Article secondary heading</h3>
      <p>Nos commodius agimus. A mene tu? Tantum dico, magis fuisse vestrum agere Epicuri diem natalem, quam illius testamento cavere ut ageretur. Tenesne igitur, inquam, Hieronymus Rhodius quid dicat esse summum bonum, quo putet omnia referri oportere? Nihilo beatiorem esse Metellum quam Regulum. Sed quanta sit alias, nunc tantum possitne esse tanta. Philosophi autem in suis lectulis plerumque moriuntur. Esse enim, nisi eris, non potes.</p>
      <p>Sunt enim quasi prima elementa naturae, quibus ubertas orationis adhiberi vix potest, nec equidem eam cogito consectari. Id Sextilius factum negabat. Quorum sine causa fieri nihil putandum est. Quae autem natura suae primae institutionis oblita est?</p>
    </article>
  </main>

  <aside>
    <h2 class="visually-hidden">Sidebar</h2>
    <section>
      <h3>Share</h3>
      <ul>
        <li><a href="#">Facebook</a></li>
        <li><a href="#">Twitter</a></li>
        <li><a href="#">Email</a></li>
      </ul>
    </section>
    <section>
      <h3>Recommended</h3>
      <ul>
        <li>
          <article>
            <h4><a href="#">Related article</a></h4>
            <p>Article description</p>
          </article>
        </li>
        <li>
          <article>
            <h4><a href="#">Related article</a></h4>
            <p>Article description</p>
          </article>
        </li>
      </ul>
    </section>
  </aside>

  <footer>
    <ul>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
    </ul>
  </footer>
</body>

Now we have a document outline that looks like this (italics = visually hidden; bold = visible):

Main article heading
- Primary [nav]
- Secondary [nav]
- Body: Main article heading
  - Article secondary heading
- Sidebar
  - Share
  - Recommended
    
    Related article
    
    Related article

This mostly feels right. The

is at the top and it all flows down perfectly with the

elements representing major page sections and the

elements representing sub sections. The main awkward bit is that the actual

and the thing that everyone thinks is a

are essentially duplicates of one another.

It wasn’t until I wrote up the first version of this article, had it nearly published, then had it thrown out the window, that I started to think differently. I talked with two accessibility consultants about the issue. They both agreed that, though this is a clever technical solution to the problem, it detracts from the experience of the very people that it is trying to help.

The issue is that when every other website in the world places the

heading at the top of the main content area, that is what screen reader users come to expect. When your site is the special snowflake that does things differently, it confuses screen reader users and it takes them some time to figure out how your heading structure is supposed to work.

So, with that in mind, I’ve settled on a new method for handling the labeling of sectioning elements. Basically, any time I would have used a visually hidden heading, I would use an `aria-label` attribute now instead. If the site has a large non-native speaking audience, I would use `aria-labelledby` instead of `aria-label`.

Concerns with the simplified outline algorithm spec

If the simplified outline algorithm is approved in its current state, we will actually need to start structuring our sites like the visually hidden

example anyway (just replace the

and

elements with

elements).

The original spec aimed to create the outline through the labeling of sectioning elements. This new spec is clearly aimed at trying to create the outline purely through heading levels. The algorithm basically calculates the heading level based on the number of ancestor sectioning elements a heading has plus the heading’s base heading level value. It’s a bit more nuanced than that in the spec, but that is the general idea of how it works in simple terms.

The simplified algorithm currently makes no mention of aria-label or aria-labelledby. This means that those attributes will not help contribute to the document outline that the simplified algorithm generates. With a lack of aria-label support, this would mean labeling a sectioning element with aria-label could easily lead to skipped heading levels deeper in the tree.

<!-- Simplified algorithm skipped heading levels issue -->
<body>
  <main>
    <h1>Primary heading for the page</h1> <!-- interpreted as <h1> -->
    <p>This is some content</p>
  </main>

  <!-- sectioning elements increase heading levels -->
  <aside aria-label="Side bar"> <!-- aria-label does not contribute -->
    <section>
      <h1>Share</h1> <!-- interpreted as <h3> -->
      <ul>
        <!-- list of social media links -->
      </ul>
    </section>

    <section>
      <h1>Recommended articles:</h1>  <!-- interpreted as <h3> -->
      <ul>
        <!-- list of recommended articles -->
      </ul>
    </section>
  </aside>
</body>

The simplified spec also considers it invalid to:

not have a heading level of 1 at the root of the document (which is problematic if you are placing the main body content inside an
element); and
not have a heading level of 1 be the first heading in a document (which, for the most part, is okay, unless you need to use a heading in the site header or in a left side bar).

It does, however, allow for there to be more than one level 1 heading at the root of the document, which I find very odd and bad for accessibility (though my concern about this seems to have been ignored).

I have voiced the issues I have with the spec and proposed possible solutions in the GitHub discussion.

For the moment, it is still best to use aria-label and/or aria-labelledby attributes instead of visually hidden headings to label sectioning elements. It isn’t worth diminishing the experience of our present day users for the sake of a spec that hasn’t even been finalized or accepted yet.

Using aria on the example layout sectioning elements

Using aria-label

This is what the HTML structure looks like if we use aria-label attributes to label the sectioning elements:

<body>
  <header>
    <a href="/" title="Go to home page">
      <img src="logo.png" alt="Site logo">
    </a>
    <nav aria-label="Primary">
      <ul>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
      </ul>
    </nav>
    <form role="search" aria-label="site">
      <label>
        <span>Search</span>
        <input type="search"/>
      </label>
      <button type="submit">Submit</button>
    </form>
  </header>

  <nav aria-label="Secondary">
    <ul>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
  </ul>
  </nav>

  <main>
    <article>
      <h1>Main article heading</h1>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quae sunt igitur communia vobis cum antiquis, iis sic utamur quasi concessis; Nihil acciderat ei, quod nollet, nisi quod anulum, quo delectabatur, in mari abiecerat. Unum est sine dolore esse, alterum cum voluptate. Laboro autem non sine causa; Theophrasti igitur, inquit, tibi liber ille placet de beata vita? Nihil opus est exemplis hoc facere longius. Duo Reges constructio interrete. Graecum enim hunc versum nostis omnes Suavis laborum est praeteritorum memoria. Haec et tu ita posuisti, et verba vestra sunt.</p>

      <h2>Article secondary heading</h2>
      <p>Nos commodius agimus. A mene tu? Tantum dico, magis fuisse vestrum agere Epicuri diem natalem, quam illius testamento cavere ut ageretur. Tenesne igitur, inquam, Hieronymus Rhodius quid dicat esse summum bonum, quo putet omnia referri oportere? Nihilo beatiorem esse Metellum quam Regulum. Sed quanta sit alias, nunc tantum possitne esse tanta. Philosophi autem in suis lectulis plerumque moriuntur. Esse enim, nisi eris, non potes.</p>
      <p>Sunt enim quasi prima elementa naturae, quibus ubertas orationis adhiberi vix potest, nec equidem eam cogito consectari. Id Sextilius factum negabat. Quorum sine causa fieri nihil putandum est. Quae autem natura suae primae institutionis oblita est?</p>
    </article>
  </main>

  <aside aria-label="Sidebar">
    <section>
      <h2>Share</h2>
      <ul>
        <li><a href="#">Facebook</a></li>
        <li><a href="#">Twitter</a></li>
        <li><a href="#">Email</a></li>
      </ul>
    </section>
    <section>
      <h2>Recommended</h2>
      <ul>
        <li>
          <article>
            <h3><a href="#">Related article</a></h3>
            <p>Article description</p>
          </article>
        </li>
        <li>
          <article>
            <h3><a href="#">Related article</a></h3>
            <p>Article description</p>
          </article>
        </li>
      </ul>
    </section>
  </aside>

  <footer>
    <ul>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
    </ul>
  </footer>
</body>

Here is the layout in CodePen in case you want to have a play around with it (sorry mobile users, it’s not mobile friendly):

See the Pen
Mock up page layout v2 (sections article) by Daniel Tonon (@daniel-tonon)
on CodePen.

Using aria-labelledby

But let’s assume that you have a huge international audience that speaks all sorts of languages. In that case, it is better to use the aria-labelledby attribute. Here is what that would look like:

<body>

  <header>
    <a href="/" title="Go to home page">
      <img src="logo.png" alt="Site logo">
    </a>
    <nav aria-labelledby="primary-nav-label">
      <div id="primary-nav-label" hidden>Primary</div>
      <ul>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
        <li><a href="#">Primary nav</a></li>
      </ul>
    </nav>
    <form role="search" aria-labelledby="search-label">
      <div id="search-label" hidden>Site</div>
      <label>
        <span>Search</span>
        <input type="search"/>
      </label>
      <button type="submit">Submit</button>
    </form>
  </header>

  <nav aria-labelledby="secondary-nav-label">
    <div id="secondary-nav-label" hidden>Secondary</div>
    <ul>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
      <li><a href="#">Secondary nav</a></li>
    </ul>
  </nav>

  <main>
    <article>
      <h1>Main article heading</h1>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quae sunt igitur communia vobis cum antiquis, iis sic utamur quasi concessis; Nihil acciderat ei, quod nollet, nisi quod anulum, quo delectabatur, in mari abiecerat. Unum est sine dolore esse, alterum cum voluptate. Laboro autem non sine causa; Theophrasti igitur, inquit, tibi liber ille placet de beata vita? Nihil opus est exemplis hoc facere longius. Duo Reges constructio interrete. Graecum enim hunc versum nostis omnes Suavis laborum est praeteritorum memoria. Haec et tu ita posuisti, et verba vestra sunt.</p>

      <h2>Article secondary heading</h2>
      <p>Nos commodius agimus. A mene tu? Tantum dico, magis fuisse vestrum agere Epicuri diem natalem, quam illius testamento cavere ut ageretur. Tenesne igitur, inquam, Hieronymus Rhodius quid dicat esse summum bonum, quo putet omnia referri oportere? Nihilo beatiorem esse Metellum quam Regulum. Sed quanta sit alias, nunc tantum possitne esse tanta. Philosophi autem in suis lectulis plerumque moriuntur. Esse enim, nisi eris, non potes.</p>
      <p>Sunt enim quasi prima elementa naturae, quibus ubertas orationis adhiberi vix potest, nec equidem eam cogito consectari. Id Sextilius factum negabat. Quorum sine causa fieri nihil putandum est. Quae autem natura suae primae institutionis oblita est?</p>
    </article>
  </main>

  <aside aria-labelledby="sidebar-label">
    <div id="sidebar-label" hidden>Sidebar</div>
    <section>
      <h2>Share</h2>
      <ul>
        <li><a href="#">Facebook</a></li>
        <li><a href="#">Twitter</a></li>
        <li><a href="#">Email</a></li>
      </ul>
    </section>
    <section>
      <h2>Recommended</h2>
      <ul>
        <li>
          <article>
            <h3><a href="#">Related article</a></h3>
            <p>Article description</p>
          </article>
        </li>
        <li>
          <article>
            <h3><a href="#">Related article</a></h3>
            <p>Article description</p>
          </article>
        </li>
      </ul>
    </section>
  </aside>

  <footer>
    <ul>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
      <li><a href="#">Footer link</a></li>
    </ul>
  </footer>
</body>

Results of using aria

The heading structure for the site at this point looks like this:

Main article heading
- Article secondary heading
- Share
- Recommended
  - Related article
  - Related article

The document outline (assuming that the original outline algorithm is implemented) looks like this:

Document

Primary
Secondary
Main article heading
- Article secondary heading
Sidebar
- Share
- Recommended
  - Related article
  - Related article

You might be thinking that the document outline looks a bit bare. Shouldn’t things like the header and footer and search be announced in there as well? Keep in mind that this is just the explicit stuff. We get a lot of implicit information provided to the user for free by using correct HTML elements in a good structure. This is a simplified version of how a screen reader user might experience the site:

[Text used in the </code> element] <ul> <li>Banner landmark <ul> <li>Link, site logo [(on focus) “go to home page”]</li> <li>“Primary” navigation landmark <ul> <li>[List of navigation links]</li> </ul> </li> <li>“Site” search landmark</li> </ul> </li> <li>“Secondary” navigation landmark <ul> <li>[List of navigation links]</li> </ul> </li> <li>Main landmark <ul> <li>“Main article heading” article landmark, heading level 1 <ul> <li>[Content]</li> <li>Heading level 2, “Article secondary heading”</li> <ul> <li>[Content]</li> </ul> </ul> </li> </ul> </li> <li>“Sidebar” complimentary landmark <ul> <li>“Share” region landmark, heading level 2 <ul> <li>[List of share links]</li> </ul> </li> <li>“Recommended” region landmark, heading level 2 <ul> <li>List with 2 items <ul> <li>Item, “Related article” article landmark, heading level 3 <ul> <li>[Content]</li> </ul> </li> <li>Item, “Related article” article landmark, heading level 3 <ul> <li>[Content]</li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> <li>Content info landmark <ul> <li>[List of footer links]</li> </ul> </li> </ul> </li> </ul> <p>As you can see, the site structure becomes quite clear and understandable to screen reader users when you factor in all of the extra implicit information that you get from using a good HTML structure</p> <p>So, even though no browser supports the document outline algorithm, it is still worth putting some effort into thinking about the outline. Screen readers still tell users what type of section something is, where sections start and (sometimes) end (depends on the screen reader), and what the section label is. This means that your efforts to make a good document structure do not go to waste.</p> <p>This type of structure comes with multiple benefits:</p> <ul> <li>The page is 100% compatible with the document outline algorithm, future proofing it in-case the algorithm is ever implemented in a real browser.</li> <li>The heading structure is completely logical.</li> <li>Screen reader users navigating via headings can quickly jump to important information.</li> <li>Screen reader users navigating via landmarks have lots of useful landmarks to move about the page.</li> <li>Screen reader users are able to quickly understand what each section contains without having to read any of the content inside of them.</li> <li>Content is grouped into semantic sections, so screen reader users do not get confused when leaving one section and entering another.</li> <li>Search engines are able to better understand what information each section holds, which could potentially improve <abbr>SEO</abbr>.</li> <li>Sighted users can take advantage of native browser features like Reader Mode.</li> </ul> <h3>What happens when you need h7?</h3> <p>There is one more sticking point when it comes to labeling sectioning elements that I haven’t addressed yet. Let’s say you have somehow managed to use up all six native heading levels and are now stuck needing one more. What do you do?</p> <p>You could use the <code>aria-labelledby</code> technique if it is just for the sake of labeling a section. Let’s say that you really want this heading to appear in the heading structure though, or maybe you just want to avoid using IDs as much as possible. Whatever the reason, you need an <code></code> element but <code></code> doesn’t exist.</p> <p>This is when the <code>aria-level</code> attribute comes to the rescue. The <code>aria-level</code> attribute will define what the heading level should be for elements that have <code>role="heading"</code> applied to them. This is how the <a target="_blank" href="https://www.w3.org/TR/WCAG20-TECHS/ARIA12.html#ARIA12-ex2">W3C recommend</a> creating a <code></code> element:</p> <pre><code><div role="heading" aria-level="7">This is a valid heading level 7 element</div></code></pre> <p>Not all screen readers support this syntax. I know that JAWS <a target="_blank" href="https://stackoverflow.com/a/56067431/1611058">treats these like <code></p> <h2></code> elements</a> rather than <code></code> elements. If you know of any screen readers that this doesn’t work in, please report the bug to the screen reader developer and also leave a comment down below.</p> <p>When I need to reach for an <code></code>, I’ll often use the implied <code>role="heading"</code> from an <code></p> <h6></code> element instead. The <code>aria-level</code> attribute will override the implicit “6” level of the <code></p> <h6></code> element. This <a target="_blank" href="https://www.w3.org/TR/using-aria/#secondrule">isn’t exactly endorsed</a> by the W3C though. It is cleaner and will allow the heading to still appear in document outline and heading structure testing tools (though they will typically appear as <code></p> <h6></code> or <code></p> <h2></code> level headings, not as <code></code> level headings).</p> <pre><code><h6 aria-level="7">This is also a valid heading level 7 element</h6></code></pre> <p>By using <code>aria-level</code>, you now have access to an infinite number of heading levels!</p> <h3>Does your site have a good structure?</h3> <p>Now that you know how to do a proper HTML structure, are you able to apply what you have learned to your website?</p> <p>I found a pretty good browser extension called “Headings Map” that is available for both <a target="_blank" href="https://chrome.google.com/webstore/detail/headingsmap/flbjommegcjonpdmenkdiocclhjacmbi?utm_source=chrome-ntp-icon">Chrome</a> and <a target="_blank" href="https://addons.mozilla.org/en-US/firefox/addon/headingsmap/">Firefox</a>. This extension will allow you to easily see both a flat heading structure representation of your site (i.e. how all browsers currently read the heading structure) and what the document structure looks like in a browser that supports the document outline algorithm (i.e. how a theoretical future browser that supports the outline algorithm would present the site structure). The HTML5 Outline view needs to be enabled in the settings menu first. This is to prevent users from being fooled into thinking that they are able to use the outline algorithm in production sites.</p> <figure><img decoding="async" src="https://css-tricks.com/wp-content/uploads/2019/06/sectioning-05.png" alt="The Headings Map extension showing the flat heading structure result on the left and the result of the Document Outline Algorithm on the right."></figure> <p>Headings Map does not currently support the <code>aria-label</code> and <code>aria-labelledby</code> attributes on sectioning elements in the HTML5 outline tab. I have been talking with the developer and he is working on fixing this issue. If you know of a good document outline testing tool that already takes <code>aria-label</code> and <code>aria-labelledby</code> into account, please share a link to it in the comments.</p> <p>Once you have a good document structure testing tool, check that both the heading structure and the document outline display a logical order with no missing headings or missing section labels anywhere.</p> <h3>Download and use a screen reader</h3> <p>The best way to test the implied semantics that you get from using correct HTML is to download an actual screen reader and try navigating your site with it. <abbr><a target="_blank" href="https://www.nvaccess.org/download/">NVDA</a></abbr> is one of the <a target="_blank" href="https://webaim.org/projects/screenreadersurvey7/#primary">most used screen readers</a> used by real screen reader users. It’s also <strong>free!</strong></p> <p>Be aware that the default settings for NVDA are optimized for usage by blind users. These default settings can drive sighted users insane. To enjoy your time using NVDA, perform the following steps (steps are based on a Windows set up, I don’t have a Mac):</p> <ol> <li>Download <abbr><a target="_blank" href="https://www.nvaccess.org/download/">NVDA</a></abbr> and install it</li> <li>Create a shortcut to NVDA in your task bar (You will be opening and closing it regularly while testing)</li> <li>Open NVDA from the task bar</li> <li>Find NVDA in your system tray<br /> <figure><img decoding="async" src="https://css-tricks.com/wp-content/uploads/2019/06/finding-NVDA.png" alt="Location of NVDA on Windows"></figure> </li> <li>Right click the tray icon > “preferences” > “settings”</li> <li>Select “mouse” in the left panel</li> <li>Deselect “Enable mouse tracking” (You can now move your mouse without NVDA screaming at you)</li> <li>Press “OK”</li> <li>Right click the tray icon > “Tools” > “Speech Viewer” (You can now see a log of everything NVDA says, don’t rely purely on this when testing though)</li> <li>In the Speech Viewer, check the “Show Speech Viewer on Startup” checkbox (It will open the Speech Viewer when you open NVDA)</li> <li>Familiarize yourself with some of the <a target="_blank" href="https://dequeuniversity.com/screenreaders/nvda-keyboard-shortcuts">keyboard controls</a></li> <li>To close NVDA, Right click the tray icon > “Exit” > “OK”</li> </ol> <p>NVDA currently doesn’t support <code></p> <article></code> and <code></p> <section></code> elements. There is <a target="_blank" href="https://github.com/nvaccess/nvda/issues/9227">an issue on GitHub</a> for supporting <code></p> <article></code> elements. When I began writing this article <code></p> <section></code> elements were already supported. Support for <code></p> <section></code> seems to have dropped for some reason. This means NVDA should be fixed. It doesn’t mean you should stop using the correct semantics in your HTML.</p> <p>Build your website with the document outline in mind then test the semantics with Headings Map and NVDA (or another screen reader). If you do, you will make your screen reader users <em>very</em> happy. You might even make the search engines happier too. ?</p> <hr> <p>Special thanks to <a target="_blank" href="https://twitter.com/ericwbailey?lang=en">Eric Bailey</a> (accessibility adviser for CSS Tricks) and Kevin Galvin (a principal consultant at <a target="_blank" href="http://www.me2accessibility.com.au/">me 2 accessibility</a>) for their advice around the usability issues of using a visually hidden <code></p> <h1></code> element at the top of the page and suggesting <code>aria-label</code> as an alternative to using visually hidden headings.</p> <p>The post <a target="_blank" rel="nofollow" href="https://css-tricks.com/how-to-section-your-html/">How to Section Your HTML</a> appeared first on <a target="_blank" rel="nofollow" href="https://css-tricks.com/">CSS-Tricks</a>.</p> <div class="fixed"></div> </div> <div class="under"> <span class="categories">Categories: </span><span><a href="http://www.webmastersgallery.com/category/design/" rel="category tag">Designing</a>, <a 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Webmasters Gallery

How to Section Your HTML

Comments sections

Don’t swap for

Headers and footers

depending on what makes sense. Adding a heading to a sectioning element is a quick way to label it.

#Heading placement

Article secondary heading

Sidebar Share Recommended Related article Related article

Share

Recommended Related article Related article

Related article

Related article

and so on.

Making Heading 1 be the first heading

Main article heading Primary [nav] Secondary [nav] Body: Main article heading Article secondary heading Sidebar Share Recommended Related article Related article

Primary [nav]

Secondary [nav]

Body: Main article heading Article secondary heading

Article secondary heading

Sidebar Share Recommended Related article Related article

Share

Recommended Related article Related article

Related article

Related article

Concerns with the simplified outline algorithm spec

Using aria on the example layout sectioning elements

Using aria-label

Using aria-labelledby

Results of using aria

Main article heading Article secondary heading Share Recommended Related article Related article

Article secondary heading

Share

Recommended Related article Related article

Related article

Related article

Don’t swap
for

Sidebar

Share

Recommended

Related article

Related article

Recommended

Related article

Related article

Main article heading

Primary [nav]

Secondary [nav]

Body: Main article heading

Article secondary heading

Sidebar

Share

Recommended

Related article

Related article

Body: Main article heading

Article secondary heading

Sidebar

Share

Recommended

Related article

Related article

Recommended

Related article

Related article

Main article heading

Article secondary heading

Share

Recommended

Related article

Related article

Recommended

Related article

Related article