Journal tags: wcag

Web Content Accessibility Guidelines—or WCAG—looks very daunting. It’s a lot to take in. It’s kind of overwhelming. It’s hard to know where to start.

I recommend taking a deep breath and focusing on the four principles of accessibility. Together they spell out the cutesy acronym POUR:

1. Perceivable
2. Operable
3. Understandable
4. Robust

A lot of work has gone into distilling WCAG down to these four guidelines. Here’s how I apply them in my work…

Perceivable

I interpret this as:

Content will be legible, regardless of how it is accessed.

For example:

• The contrast between background and foreground colours will meet the ratios defined in WCAG 2.
• Content will be grouped into semantically-sensible HTML regions such as navigation, main, footer, etc.

Operable

I interpret this as:

Core functionality will be available, regardless of how it is accessed.

For example:

• I will ensure that interactive controls such as links and form inputs will be navigable with a keyboard.
• Every form control will be labelled, ideally with a visible label.

Understandable

I interpret this as:

Content will make sense, regardless of how it is accessed.

For example:

• Images will have meaningful alternative text.
• I will make sensible use of heading levels.

This is where it starts to get quite collaboritive. Working at an agency, there will some parts of website creation and maintenance that will require ongoing accessibility knowledge even when our work is finished.

For example:

• Images uploaded through a content management system will need sensible alternative text.
• Articles uploaded through a content management system will need sensible heading levels.

Robust

I interpret this as:

Content and core functionality will still work, regardless of how it is accessed.

For example:

• Drop-down controls will use the HTML select element rather than a more fragile imitation.
• I will only use JavaScript to provide functionality that isn’t possible with HTML and CSS alone.

If you’re applying a mindset of progressive enhancement, this part comes for you. If you take a different approach, you’re going to have a bad time.

Taken together, these four guidelines will get you very far without having to dive too deeply into the rest of WCAG.

I was doing some accessibility work with a client a little while back. It was mostly giving their site the once-over, highlighting any issues that we could then discuss. It was an audit of sorts.

While I was doing this I started to realise that not all accessibility issues are created equal. I don’t just mean in their severity. I mean that some issues can—and should—be caught early on, while other issues can only be found later.

Take colour contrast. This is something that should be checked before a line of code is written. When designs are being sketched out and then refined in a graphical editor like Figma, that’s the time to check the ratio between background and foreground colours to make sure there’s enough contrast between them. You can catch this kind of thing later on, but by then it’s likely to come with a higher cost—you might have to literally go back to the drawing board. It’s better to find the issue when you’re at the drawing board the first time.

Then there’s the HTML. Most accessibility issues here can be caught before the site goes live. Usually they’re issues of ommission: form fields that don’t have an explicitly associated label element (using the for and id attributes); images that don’t have alt text; pages that don’t have sensible heading levels or landmark regions like main and nav. None of these are particularly onerous to fix and they come with the biggest bang for your buck. If you’ve got sensible forms, sensible headings, alt text on images, and a solid document structure, you’ve already covered the vast majority of accessibility issues with very little overhead. Some of these checks can also be automated: alt text for images; labels for inputs.

Then there’s interactive stuff. If you only use native HTML elements you’re probably in the clear, but chances are you’ve got some bespoke interactivity on your site: a carousel; a mega dropdown for navigation; a tabbed interface. HTML doesn’t give you any of those out of the box so you’d need to make your own using a combination of HTML, CSS, JavaScript and ARIA. There’s plenty of testing you can do before launching—I always ask myself “What would Heydon do?”—but these components really benefit from being tested by real screen reader users.

So if you commission an accessibility audit, you should hope to get feedback that’s mostly in that third category—interactive widgets.

If you get feedback on document structure and other semantic issues with the HTML, you should fix those issues, sure, but you should also see what you can do to stop those issues going live again in the future. Perhaps you can add some steps in the build process. Or maybe it’s more about making sure the devs are aware of these low-hanging fruit. Or perhaps there’s a framework or content management system that’s stopping you from improving your HTML. Then you need to execute a plan for ditching that software.

If you get feedback about colour contrast issues, just fixing the immediate problem isn’t going to address the underlying issue. There’s a process problem, or perhaps a communication issue. In that case, don’t look for a technical solution. A design system, for example, will not magically fix a workflow issue or route around the problem of designers and developers not talking to each other.

When you commission an accessibility audit, you want to make sure you’re getting the most out of it. Don’t squander it on issues that you can catch and fix yourself. Make sure that the bulk of the audit is being spent on the specific issues that are unique to your site.

The first day of Web Directions North just wrapped up and what a day it was.

Everything went super-smoothly right from the get-go with some opening remarks from the ever-sauve Dave Shea followed by some very entertaining audience participation led by Molly. Her Crimes Against Web Standards presentation was punctuated with hilarious video cliplets from Eric Meyer and others.

After that, I did my talk which went pretty well. As I said at the outset, I was covering the basic Ajax stuff to set the scene for Derek. I was John The Baptist to his Jesus Christ.

Once that was done, I had a long lunch in the rotating restaurant on the nineteenth floor of the hotel… if only the damn fog would lift a little bit more.

The afternoon was spent luxuriating in the microfromats presentation from John, Dan and Tantek followed by Joe Clark in scintillating form. He conducted a fireside chat and had the audience in the palm of his supple hand. He gave us a scoop by unveiling his call to Tim Berners-Lee to scrap WCAG 2. Quelle surprise.

Now I’m kicking back with a beer courtesy of Adobe and meeting some great people. All in all, a great day. May tomorrow go equally smoothly.