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Tag: css

A11y 101: 1.4.5 Images of Text

I’ve been in developing websites for over twenty years. When I started in the industry, we had to create images of text if we wanted to use a specific font. This was necessary to make things work the way we wanted visually.

The problem of images of text is that screen readers can’t see the text. Like other images we need to provide alt text that reflects the text in the image. It was early in my career, so I tried to find a way to write. I used individual PNGs of letters with the alt text set to that letter. What I didn’t fully understand was assistive technology. My attempted method ended up with the AT announcing each letter. This is because they read each image as a separate unit of text. Spelling my name would be announced as, “N image, A image, T image.” This doesn’t help anyone.

20 years later…

The folks at the W3C’s CSS working group have been working overtime. They have provided us ways to import fonts from CDNs. We have the ability to clip with text. Drop shadows, gradients, transforms provide additional customization.

We also have SVGs. They allow us to put text directly into an image as text. This text is available to AT. This allows us to put stylized text on a path for display.

And…

We do not need to put text in our images anymore. And I’m not referring to logos. That another can of worms. We have multiple ways to add stylized text with unique fonts. We don’t need to use text in images anymore. Just don’t do it.

But…

I know what you are thinking, “My current platform doesn’t allow me to…” or “That requires me to work with IT to make changes and I don’t have many hours…”

There are always constraints. What I described earlier is a best case scenario where all conditions are right to make this problem go away. But that’s not how life works. You will need to use a custom font as an image of text at some point.

And it isn’t difficult. We treat it just like we do with other images. We use alternative text to supplement the image with a text equivalent. In the case of text in an image, that includes all the text.

If you alt text is over 150 characters, I want you to pause. When alt text gets really long it can overwhelm some users. Neuro-typical brains will probably be fine. But neuro-divergent users will have problems. This may be an area where you can break up the image into smaller images. Break the text up to match the images. You can also use figure and figcaption. Here, everything is wrapped in a figure. The alt text is placed on the image. The figcaption contains the rest of the explanatory text.

<figure>
  <img src="https://placekitten.com/200/300" alt="Text in the image." />
  <figcaption>The remainder of the the text described in the image to complete the message needed to express things.</figcaption>
</figure>

And the most important tip I can leave you with is:

Always put sentence ending punctuation at the end of your alt text.

When you don’t use closing punctuation, most AT browser combos will start reading the next item. They will read it as if it were a run-on sentence. This causes added confusion. With the punctuation in place, the AT will pause or announce the punctuation. This is determined by the user’s settings. In either case, the user understands the concepts better without the run-on sentence.

Have some thoughts on this topic? Let’s talk over on LinkedIn and BlueSky!

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A11y 101: 1.3.2 Meaningful Sequence

The order of consumption of media affects its meaning.

As an 80s kid, I learned that the placement of a comma can change a sentence’s meaning. Of course we learned it through dirty jokes:

  • i helped my uncle jack off a horse
  • I helped my uncle Jack, off a horse.
  • I helped my uncle, jack off a horse.
  • I helped my uncle, Jack, off a horse.

Even the order makes a big difference:

  • I helped my uncle off a horse, Jack.
  • I helped Jack, my uncle, off a horse.

When we write and layout our document, we need to consider the rendered HTML and CSS. We also need to consider the HTML on its own. Some of your users will use tools to absorb the content in different manners.

We need to ensure a meaningful sequences when at the word, sentence, paragraph, article, and component level. We want to develop a meaningful order at the document level also. Usually we do this through landmarks or the use of headings to designate areas of the content. Depending on the relationships of the content, areas could dictate the understanding of the document. So does the header, footer, or main have to follow a certain order? Our instinct is to go header, main, footer. What if our HTML was Main, header, footer and we use CSS to visually move the navigation?

But should we?

Stepping in from the document level, there are things to consider within each component – visual presentation and content presentation. Look at these two cards:

See the Pen 1.3.2 Meaningful Sequence by Nat Tarnoff (@nattarnoff) on CodePen.

Without looking (I saw you look at the HTML tab), you might guess how this is coded. You’d likely think it is Card Title, CTA, image, paragraph, list. And you’d be pretty close. Next you’re thinking, “Ah, image first, that’s how cards are done.”

Both cards have this structure:

<div class="card" id="card1">
    <h2>Card Title</h2>
    <img src="https://placecats.com/millie_neo/300/200" alt="Millie & Neo resting on the cat tree."/>
    <p>Kool kats & kittens at the library!</p>
    <ul>
      <li>Where: Main Street Library</li>
      <li>When: 1pm to 4pm</li>
      <li>Day: Saturday 1/23</li>
    </ul>
    <button type="button">RSVP</button>
  </div>

We can move the content around using CSS. Are the details are more important than the image or the tagline? We try Title, Details, CTA, paragraph, and image. When we are at this stage of developing the code, it’s important to just focus on how the page reads. The two versions of the HTML do not effectively change the meaning of any of the content. Nor do they interfere with the visual display.

How do we fix the meaningful sequence?

We start by looking at individual pieces of content. Let’s start with a button. A button will fire an action, so I need to give it an accessible name to reflect that. I can add a pre-icon, and post-icon, and I know I’ll have at least two states. If I have visible text, then the icons don’t need alt text.

Step two, after styling the most basic of elements, we pair them together. We’re going to use our button to make a search component. This means I need a label, an input, and a way to fire the search. We’re keeping this simple to begin. We’ll use a button and a post action so the page refreshes with results. Most developers will code this label, input, button. But they don’t have to be in that order.

<div class="search-widget">
<input type="search" id="search" aria-labelledby="title"/>
<button id="title" type="submit"><img src="magnifier.png" alt="Search" /></button>
</div>

An easily recognizable or learnable icon can be used as a label as above. We of course provide the alt text. We can use the alt text of the icon in the button as the label for the form. We can change the order visually and it has no effect on how a non-visual user would understand it.

Break up content into the smallest functional pieces. Make sure each piece is understood fully within itself in a meaningful sequence. Then start layering those into the page document in the order to use them. A sales page would have account information first. Then it would include the client’s dashboard. Next, it provides access to individual child accounts. Finally, it lists leads and sales. There is a sidebar to do some research or note taking. We probably have some account screen for the sales person as well. Within each of those sections they’ll have an order that makes sense.

But at a page level the “main” content will be the what the user wants the most. So we put it first. Don’t run away yet. Initially, the order of the main section doesn’t matter. As this user gets used to it, they may want to show and hide different widgets. They might even want to move them. Let’s put a plan in place for that. We don’t want to forget our sidebar, main nav, or account information. These need to be placed in based on order of importance to the user at the code level. When you turn to CSS to position and decorate, is when we get the visual design.

Its always best to do user research on new products. An application like we describe above will benefit from interviewing the potential users. Then within the design, marketing, executive, and client teams conduct some card sorting exercises. Keep repeating this as you develop and design the application. You may find you need to change your design or users didn’t think like you thought they would.

Have more questions? Let’s discuss it over on LinkedIn or BlueSky!

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