A place to cache linked articles (think custom and personal wayback machine)
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

4 年之前
4 年之前
4 年之前
4 年之前
4 年之前
4 年之前
4 年之前
4 年之前
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199
  1. <!doctype html><!-- This is a valid HTML5 document. -->
  2. <!-- Screen readers, SEO, extensions and so on. -->
  3. <html lang="fr">
  4. <!-- Has to be within the first 1024 bytes, hence before the <title>
  5. See: https://www.w3.org/TR/2012/CR-html5-20121217/document-metadata.html#charset -->
  6. <meta charset="utf-8">
  7. <!-- Why no `X-UA-Compatible` meta: https://stackoverflow.com/a/6771584 -->
  8. <!-- The viewport meta is quite crowded and we are responsible for that.
  9. See: https://codepen.io/tigt/post/meta-viewport-for-2015 -->
  10. <meta name="viewport" content="width=device-width,initial-scale=1">
  11. <!-- Required to make a valid HTML5 document. -->
  12. <title>HTML: The Inaccessible Parts (archive) — David Larlet</title>
  13. <meta name="description" content="Publication mise en cache pour en conserver une trace.">
  14. <!-- That good ol' feed, subscribe :). -->
  15. <link rel="alternate" type="application/atom+xml" title="Feed" href="/david/log/">
  16. <!-- Generated from https://realfavicongenerator.net/ such a mess. -->
  17. <link rel="apple-touch-icon" sizes="180x180" href="/static/david/icons2/apple-touch-icon.png">
  18. <link rel="icon" type="image/png" sizes="32x32" href="/static/david/icons2/favicon-32x32.png">
  19. <link rel="icon" type="image/png" sizes="16x16" href="/static/david/icons2/favicon-16x16.png">
  20. <link rel="manifest" href="/static/david/icons2/site.webmanifest">
  21. <link rel="mask-icon" href="/static/david/icons2/safari-pinned-tab.svg" color="#07486c">
  22. <link rel="shortcut icon" href="/static/david/icons2/favicon.ico">
  23. <meta name="msapplication-TileColor" content="#f0f0ea">
  24. <meta name="msapplication-config" content="/static/david/icons2/browserconfig.xml">
  25. <meta name="theme-color" content="#f0f0ea">
  26. <!-- Documented, feel free to shoot an email. -->
  27. <link rel="stylesheet" href="/static/david/css/style_2020-06-19.css">
  28. <!-- See https://www.zachleat.com/web/comprehensive-webfonts/ for the trade-off. -->
  29. <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>
  30. <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>
  31. <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>
  32. <link rel="preload" href="/static/david/css/fonts/triplicate_t3_regular.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
  33. <link rel="preload" href="/static/david/css/fonts/triplicate_t3_bold.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
  34. <link rel="preload" href="/static/david/css/fonts/triplicate_t3_italic.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
  35. <script type="text/javascript">
  36. function toggleTheme(themeName) {
  37. document.documentElement.classList.toggle(
  38. 'forced-dark',
  39. themeName === 'dark'
  40. )
  41. document.documentElement.classList.toggle(
  42. 'forced-light',
  43. themeName === 'light'
  44. )
  45. }
  46. const selectedTheme = localStorage.getItem('theme')
  47. if (selectedTheme !== 'undefined') {
  48. toggleTheme(selectedTheme)
  49. }
  50. </script>
  51. <meta name="robots" content="noindex, nofollow">
  52. <meta content="origin-when-cross-origin" name="referrer">
  53. <!-- Canonical URL for SEO purposes -->
  54. <link rel="canonical" href="https://daverupert.com/2020/02/html-the-inaccessible-parts/">
  55. <body class="remarkdown h1-underline h2-underline h3-underline hr-center ul-star pre-tick">
  56. <article>
  57. <header>
  58. <h1>HTML: The Inaccessible Parts</h1>
  59. </header>
  60. <nav>
  61. <p class="center">
  62. <a href="/david/" title="Aller à l’accueil">🏠</a> •
  63. <a href="https://daverupert.com/2020/02/html-the-inaccessible-parts/" title="Lien vers le contenu original">Source originale</a>
  64. </p>
  65. </nav>
  66. <hr>
  67. <main>
  68. <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>
  69. <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>
  70. <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>
  71. <p><hr/>
  72. <p><code>&lt;input type="number"&gt;</code><br/>
  73. 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>
  74. <p><code>&lt;input type="date"&gt;</code><br/>
  75. 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>
  76. <p><code>&lt;input type="search"&gt;</code><br/>
  77. 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>
  78. <p><code>&lt;select multiple&gt;</code><br/>
  79. 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>
  80. <p><code>&lt;progress&gt;</code><br/>
  81. 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>
  82. <p><code>&lt;meter&gt;</code><br/>
  83. 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>
  84. <p><code>&lt;dialog&gt;</code><br/>
  85. 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>
  86. <p><code>&lt;details&gt;&lt;summary&gt;</code><br/>
  87. 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>
  88. <p><code>&lt;video&gt;</code><br/>
  89. 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>
  90. <p><code>&lt;div onclick&gt;</code><br/>
  91. 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>
  92. <p><code>&lt;div aria-label&gt;</code><br/>
  93. 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>
  94. <p><code>&lt;a href&gt;&lt;div&gt;Block Links&lt;/div&gt;&lt;/a&gt;</code><br/>
  95. 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>
  96. <p><code>aria-controls</code><br/>
  97. 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>
  98. <p><code>role="tablist"</code><br/>
  99. 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>
  100. <hr/>
  101. <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>
  102. <p><em>Edit 2/28/2020:</em></p>
  103. <ul>
  104. <li>Added the year to each link to help reflect the potential “staleness” of the information.</li>
  105. <li>Added a note to test with actual users.</li>
  106. <li>Added a link to Léonie Watson’s rebuttal under the <code>tablist</code> discussion.</li>
  107. </ul></p>
  108. </main>
  109. </article>
  110. <hr>
  111. <footer>
  112. <p>
  113. <a href="/david/" title="Aller à l’accueil">🏠</a> •
  114. <a href="/david/log/" title="Accès au flux RSS">🤖</a> •
  115. <a href="http://larlet.com" title="Go to my English profile" data-instant>🇨🇦</a> •
  116. <a href="mailto:david%40larlet.fr" title="Envoyer un courriel">📮</a> •
  117. <abbr title="Hébergeur : Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33184162340">🧚</abbr>
  118. </p>
  119. <template id="theme-selector">
  120. <form>
  121. <fieldset>
  122. <legend>Thème</legend>
  123. <label>
  124. <input type="radio" value="auto" name="chosen-color-scheme" checked> Auto
  125. </label>
  126. <label>
  127. <input type="radio" value="dark" name="chosen-color-scheme"> Foncé
  128. </label>
  129. <label>
  130. <input type="radio" value="light" name="chosen-color-scheme"> Clair
  131. </label>
  132. </fieldset>
  133. </form>
  134. </template>
  135. </footer>
  136. <script type="text/javascript">
  137. function loadThemeForm(templateName) {
  138. const themeSelectorTemplate = document.querySelector(templateName)
  139. const form = themeSelectorTemplate.content.firstElementChild
  140. themeSelectorTemplate.replaceWith(form)
  141. form.addEventListener('change', (e) => {
  142. const chosenColorScheme = e.target.value
  143. localStorage.setItem('theme', chosenColorScheme)
  144. toggleTheme(chosenColorScheme)
  145. })
  146. const selectedTheme = localStorage.getItem('theme')
  147. if (selectedTheme && selectedTheme !== 'undefined') {
  148. form.querySelector(`[value="${selectedTheme}"]`).checked = true
  149. }
  150. }
  151. const prefersColorSchemeDark = '(prefers-color-scheme: dark)'
  152. window.addEventListener('load', () => {
  153. let hasDarkRules = false
  154. for (const styleSheet of Array.from(document.styleSheets)) {
  155. let mediaRules = []
  156. for (const cssRule of styleSheet.cssRules) {
  157. if (cssRule.type !== CSSRule.MEDIA_RULE) {
  158. continue
  159. }
  160. // WARNING: Safari does not have/supports `conditionText`.
  161. if (cssRule.conditionText) {
  162. if (cssRule.conditionText !== prefersColorSchemeDark) {
  163. continue
  164. }
  165. } else {
  166. if (cssRule.cssText.startsWith(prefersColorSchemeDark)) {
  167. continue
  168. }
  169. }
  170. mediaRules = mediaRules.concat(Array.from(cssRule.cssRules))
  171. }
  172. // WARNING: do not try to insert a Rule to a styleSheet you are
  173. // currently iterating on, otherwise the browser will be stuck
  174. // in a infinite loop…
  175. for (const mediaRule of mediaRules) {
  176. styleSheet.insertRule(mediaRule.cssText)
  177. hasDarkRules = true
  178. }
  179. }
  180. if (hasDarkRules) {
  181. loadThemeForm('#theme-selector')
  182. }
  183. })
  184. </script>
  185. </body>
  186. </html>