davidbgk
/
larlet-fr-david-cache


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194
							<!doctype html><!-- This is a valid HTML5 document. -->
<!-- Screen readers, SEO, extensions and so on. -->
<html lang="fr">
<!-- Has to be within the first 1024 bytes, hence before the <title>
  See: https://www.w3.org/TR/2012/CR-html5-20121217/document-metadata.html#charset -->
<meta charset="utf-8">
<!-- Why no `X-UA-Compatible` meta: https://stackoverflow.com/a/6771584 -->
<!-- The viewport meta is quite crowded and we are responsible for that.
  See: https://codepen.io/tigt/post/meta-viewport-for-2015 -->
<meta name="viewport" content="width=device-width,initial-scale=1">
<!-- Required to make a valid HTML5 document. -->
<title>HTML: The Inaccessible Parts (archive) — David Larlet</title>
<!-- That good ol' feed, subscribe :). -->
<link rel="alternate" type="application/atom+xml" title="Feed" href="/david/log/">
<!-- Generated from https://realfavicongenerator.net/ such a mess. -->
<link rel="apple-touch-icon" sizes="180x180" href="/static/david/icons2/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="/static/david/icons2/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="/static/david/icons2/favicon-16x16.png">
<link rel="manifest" href="/static/david/icons2/site.webmanifest">
<link rel="mask-icon" href="/static/david/icons2/safari-pinned-tab.svg" color="#07486c">
<link rel="shortcut icon" href="/static/david/icons2/favicon.ico">
<meta name="msapplication-TileColor" content="#f0f0ea">
<meta name="msapplication-config" content="/static/david/icons2/browserconfig.xml">
<meta name="theme-color" content="#f0f0ea">
<!-- Documented, feel free to shoot an email. -->
<link rel="stylesheet" href="/static/david/css/style_2020-06-19.css">
<!-- See https://www.zachleat.com/web/comprehensive-webfonts/ for the trade-off. -->
<link rel="preload" href="/static/david/css/fonts/triplicate_t4_poly_regular.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: light), (prefers-color-scheme: no-preference)" crossorigin>
<link rel="preload" href="/static/david/css/fonts/triplicate_t4_poly_bold.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: light), (prefers-color-scheme: no-preference)" crossorigin>
<link rel="preload" href="/static/david/css/fonts/triplicate_t4_poly_italic.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: light), (prefers-color-scheme: no-preference)" crossorigin>
<link rel="preload" href="/static/david/css/fonts/triplicate_t3_regular.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
<link rel="preload" href="/static/david/css/fonts/triplicate_t3_bold.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
<link rel="preload" href="/static/david/css/fonts/triplicate_t3_italic.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
<script type="text/javascript">
    function toggleTheme(themeName) {
        document.documentElement.classList.toggle(
            'forced-dark',
            themeName === 'dark'
        )
        document.documentElement.classList.toggle(
            'forced-light',
            themeName === 'light'
        )
    }
    const selectedTheme = localStorage.getItem('theme')
    if (selectedTheme !== 'undefined') {
        toggleTheme(selectedTheme)
    }
</script>

  <meta name="robots" content="noindex, nofollow">
  <meta content="origin-when-cross-origin" name="referrer">
  <!-- Canonical URL for SEO purposes -->
  <link rel="canonical" href="https://daverupert.com/2020/02/html-the-inaccessible-parts/">

<body class="remarkdown h1-underline h2-underline h3-underline hr-center ul-star pre-tick">

<article>
<h1>HTML: The Inaccessible Parts</h1>
<nav>
  <p class="center">
    <a href="/david/" title="Aller à l’accueil" tabindex="1">🏠</a>
  </p>
</nav>
<hr>
<h2><a href="https://daverupert.com/2020/02/html-the-inaccessible-parts/">Source originale du contenu</a></h2>
<p>I’ve always abided in the idea that “HTML is accessible by default and then we come along and mess it up.” In a lot places this is very true and by just using a suitable HTML element instead of a generic <code>div</code> or <code>span</code> we can have a big Accessibility impact.</p>

<p>But that’s not always the case. There are some cases where even using plain ol’ HTML causes accessibility problems. I get frustrated and want to quit web development whenever I read about these types of issues. Because if browsers can’t get this right, what hope is there for the rest of us. I’m trying to do the best I can, use the platform, but seems like there’s a dozen “gotchas” lurking in the shadows.</p>

<p>I’m going to start rounding up those HTML shortfalls in this here post as a little living document that I can personally reference every time I write some HTML.</p>

<p><hr/>
<p><code>&lt;input type="number"&gt;</code><br/>
Gov.UK finds <a href="https://technology.blog.gov.uk/2020/02/24/why-the-gov-uk-design-system-team-changed-the-input-type-for-numbers/">Number Inputs aren’t inclusive</a>. (2020)</p>
<p><code>&lt;input type="date"&gt;</code><br/>
Graham Armfield finds <a href="https://www.hassellinclusion.com/blog/input-type-date-ready-for-use/">Date Inputs not ready for use</a>. (2019)</p>
<p><code>&lt;input type="search"&gt;</code><br/>
Adrian Roselli points out <a href="https://adrianroselli.com/2019/07/ignore-typesearch.html">Search Inputs aren’t as useful as originally thought</a>. (2019)</p>
<p><code>&lt;select multiple&gt;</code><br/>
Sarah Higley tests with actual users and finds <a href="https://www.24a11y.com/2019/select-your-poison-part-2/">Select Multiple has a 25.3% success rate</a>. (2019)</p>
<p><code>&lt;progress&gt;</code><br/>
Scott O’Hara finds <a href="https://scottaohara.github.io/a11y_styled_form_controls/src/progress-bar/">numerous errors with the Progress element</a>. (2018)</p>
<p><code>&lt;meter&gt;</code><br/>
Scott O’Hara finds <a href="https://scottaohara.github.io/a11y_styled_form_controls/src/meter/">more numerous errors with the rare Meter element</a>. (2018)</p>
<p><code>&lt;dialog&gt;</code><br/>
Scott O’Hara declares <a href="https://www.scottohara.me/blog/2019/03/05/open-dialog.html">Dialog not ready for production</a>. (2019)</p>
<p><code>&lt;details&gt;&lt;summary&gt;</code><br/>
Adrian Roselli feels <a href="https://adrianroselli.com/2019/04/details-summary-are-not-insert-control-here.html">Details/Summary are only good in limited contexts</a> (e.g. <a href="https://daverupert.com/2019/12/why-details-is-not-an-accordion/">Details doesn’t work as an Accordion</a>, which is what I would expect). (2019)</p>
<p><code>&lt;video&gt;</code><br/>
Scott Vinkle goes with a third-party player after seeing that <a href="https://scottvinkle.me/blogs/blog/how-accessible-is-the-html-video-player">the native HTML Video Player is a very inconsistent experience for screen readers</a>. (2019)</p>
<p><code>&lt;div onclick&gt;</code><br/>
Technically this is JavaScript, but the screen reader <a href="https://github.com/carbon-design-system/carbon/issues/986#issuecomment-412968245">JAWS announces “Clickable” when the element or one its ancestors have a click event handler</a>. This is a bummer for trying to make tap areas bigger. (2018)</p>
<p><code>&lt;div aria-label&gt;</code><br/>
Paciello Group educates how <a href="https://developer.paciellogroup.com/blog/2017/07/short-note-on-aria-label-aria-labelledby-and-aria-describedby/"><code>aria-label</code>, <code>aria-labelledby</code> , and <code>aria-describedby</code> only work on certain elements… and not <code>&lt;div&gt;</code> elements</a>. It’s not very intuitive to me that <code>aria-label</code> would only work <em>sometimes</em> and it seems like something linters like <a href="https://www.deque.com/axe/">axe</a> should catch. (2017)</p>
<p><code>&lt;a href&gt;&lt;div&gt;Block Links&lt;/div&gt;&lt;/a&gt;</code><br/>
Adrian Roselli finds <a href="https://adrianroselli.com/2020/02/block-links-cards-clickable-regions-etc.html">Block Links in a Card UI have usability issues</a>. (2020)</p>
<p><code>aria-controls</code><br/>
The <code>aria-controls</code> attribute is a great way to establish a relationship between two elements and is in tons of tutorials… only one problem… Heydon Pickering points out <a href="https://heydonworks.com/article/aria-controls-is-poop/"><code>aria-controls</code> doesn’t do anything</a>. (2016)</p>
<p><code>role="tablist"</code><br/>
After some user testing, Jeff Smith discovered <a href="http://simplyaccessible.com/article/danger-aria-tabs/">the best way to make accessible tabs is to remove <code>role="tablist"</code>, <code>role="tab"</code>, <code>role="tabpanel"</code> from their tabs</a>. FWIW, these <a href="https://medium.theuxblog.com/danger-testing-accessibility-with-real-people-4515f72db648">findings were contested in a 3,900 word blog post by Léonie Watson</a>. (2016)</p>
<hr/>
<p>Your mileage may vary, test with actual users. I’ll do my best to update this as the situation evolves glacially over the next 20 years.</p>
<p><em>Edit 2/28/2020:</em></p>
<ul>
<li>Added the year to each link to help reflect the potential “staleness” of the information.</li>
<li>Added a note to test with actual users.</li>
<li>Added a link to Léonie Watson’s rebuttal under the <code>tablist</code> discussion.</li>
</ul></p>
</article>


<hr>

<footer>
  <p>
    <a href="/david/" title="Aller à l’accueil">🏠</a> •
    <a href="/david/log/" title="Accès au flux RSS">🤖</a> •
    <a href="http://larlet.com" title="Go to my English profile" data-instant>🇨🇦</a> •
    <a href="mailto:david%40larlet.fr" title="Envoyer un courriel">📮</a> •
    <abbr title="Hébergeur : Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33184162340">🧚</abbr>
  </p>
  <template id="theme-selector">
      <form>
          <fieldset>
              <legend>Thème</legend>
              <label>
                  <input type="radio" value="auto" name="chosen-color-scheme" checked> Auto
              </label>
              <label>
                  <input type="radio" value="dark" name="chosen-color-scheme"> Foncé
              </label>
              <label>
                  <input type="radio" value="light" name="chosen-color-scheme"> Clair
              </label>
          </fieldset>
      </form>
  </template>
</footer>
<script type="text/javascript">
    function loadThemeForm(templateName) {
        const themeSelectorTemplate = document.querySelector(templateName)
        const form = themeSelectorTemplate.content.firstElementChild
        themeSelectorTemplate.replaceWith(form)

        form.addEventListener('change', (e) => {
            const chosenColorScheme = e.target.value
            localStorage.setItem('theme', chosenColorScheme)
            toggleTheme(chosenColorScheme)
        })

        const selectedTheme = localStorage.getItem('theme')
        if (selectedTheme && selectedTheme !== 'undefined') {
            form.querySelector(`[value="${selectedTheme}"]`).checked = true
        }
    }

    const prefersColorSchemeDark = '(prefers-color-scheme: dark)'
    window.addEventListener('load', () => {
        let hasDarkRules = false
        for (const styleSheet of Array.from(document.styleSheets)) {
            let mediaRules = []
            for (const cssRule of styleSheet.cssRules) {
                if (cssRule.type !== CSSRule.MEDIA_RULE) {
                    continue
                }
                // WARNING: Safari does not have/supports `conditionText`.
                if (cssRule.conditionText) {
                    if (cssRule.conditionText !== prefersColorSchemeDark) {
                        continue
                    }
                } else {
                    if (cssRule.cssText.startsWith(prefersColorSchemeDark)) {
                        continue
                    }
                }
                mediaRules = mediaRules.concat(Array.from(cssRule.cssRules))
            }

            // WARNING: do not try to insert a Rule to a styleSheet you are
            // currently iterating on, otherwise the browser will be stuck
            // in a infinite loop…
            for (const mediaRule of mediaRules) {
                styleSheet.insertRule(mediaRule.cssText)
                hasDarkRules = true
            }
        }
        if (hasDarkRules) {
            loadThemeForm('#theme-selector')
        }
    })
</script>
</body>
</html>