davidbgk
/
larlet-fr-david-cache

<!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` element
  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>Add Responsive-Friendly Enhancements to `details` with `details-utils`-zachleat.com (archive) — David Larlet</title>
<meta name="description" content="Publication mise en cache pour en conserver une trace.">
<!-- 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="#f7f7f7">
<meta name="msapplication-config" content="/static/david/icons2/browserconfig.xml">
<meta name="theme-color" content="#f7f7f7" media="(prefers-color-scheme: light)">
<meta name="theme-color" content="#272727" media="(prefers-color-scheme: dark)">
<!-- Documented, feel free to shoot an email. -->
<link rel="stylesheet" href="/static/david/css/style_2021-01-20.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>
    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://www.zachleat.com/web/details-utils/">

<body class="remarkdown h1-underline h2-underline h3-underline em-underscore hr-center ul-star pre-tick" data-instant-intensity="viewport-all">


<article>
  <header>
    <h1>Add Responsive-Friendly Enhancements to `details` with `details-utils`-zachleat.com</h1>
  </header>
  <nav>
    <p class="center">
      <a href="/david/" title="Aller à l’accueil"><svg class="icon icon-home">
        <use xlink:href="/static/david/icons2/symbol-defs-2021-12.svg#icon-home"></use>
      </svg> Accueil</a> •
      <a href="https://www.zachleat.com/web/details-utils/" title="Lien vers le contenu original">Source originale</a>
    </p>
  </nav>
  <hr>
  <p>I use <code>&lt;details&gt;</code>. I use <code>&lt;details&gt;</code> a lot. It is one of my favorite HTML elements.</p>
<p>Over time I’ve collected a bunch of add-on utilities to enhance <code>&lt;details&gt;</code> with new features and functionality. They’ve been super useful in <em>a bunch</em> of long-standing production implementations at Netlify:</p>
<p>I’ve decided to finally package those <code>&lt;details&gt;</code> helpers up and formally release them as a web component!</p>
<h2 id="lessdetails-utilsgreater" tabindex="-1"><code>&lt;details-utils&gt;</code> <a class="direct-link" href="#lessdetails-utilsgreater" aria-hidden="true">#</a></h2>
<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br>  <br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<p>At time of writing, this web component adds five new responsive-friendly enhancements to one or more <code>&lt;details&gt;</code> elements nestled inside:</p>
<ul><li>Force open/closed</li><li>Click outside to close</li><li>Close on <code>esc</code></li><li>Animate open/closed</li><li>Toggle root element <code>class</code></li></ul>
<h3 id="force-openclosed" tabindex="-1">Force open/closed <a class="direct-link" href="#force-openclosed" aria-hidden="true">#</a></h3>
<p>In this example, the <code>&lt;details&gt;</code> is forced open when viewport is wider than <code>48em</code>.</p>
<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">force-open</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>(min-width: 48em)<span class="token punctuation">"</span></span> <span class="token attr-name">force-restore</span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span> <span class="token attr-name">open</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<p>I’ve gotten <em>a lot</em> of mileage out of the above example, specifically to drive navigation that is always visible at a certain breakpoint (think a collapsible menu at small viewport versus sidebar, e.g. <a href="https://www.11ty.dev/docs/"><code>11ty.dev/docs/</code></a>).</p>
<p>Alternatively, <code>force-close</code> is also available. The optional <code>force-restore</code> attribute will restore previous state when the <code>force-open</code> or <code>force-close</code> media queries do not match.</p>
<p>The media query is optional, and using it as a bare attribute allows control of the state pre and post JavaScript.</p>
<pre class="language-html"><code class="language-html"><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">force-open</span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span><br><br><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">force-close</span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span> <span class="token attr-name">open</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<h3 id="click-outside-to-close" tabindex="-1">Click outside to close <a class="direct-link" href="#click-outside-to-close" aria-hidden="true">#</a></h3>
<p>If you click anywhere on the document (outside of the <code>&lt;details&gt;</code> content), the <code>&lt;details&gt;</code> will be closed. This is useful when you want to absolutely position the <code>&lt;details&gt;</code> content (maybe to make a little custom dropdown 😱)</p>
<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">close-click-outside</span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<p>You can scope this with a media query as well:</p>
<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">close-click-outside</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>(min-width: 48em)<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<p>Add your own bonus close button inside of the content (to complement <code>&lt;summary&gt;</code>):</p>
<pre class="language-css"><code class="language-css"><br><span class="token selector">details-utils:not(:defined) [data-du-close-click]</span> <span class="token punctuation">{</span><br>  <span class="token property">display</span><span class="token punctuation">:</span> none<span class="token punctuation">;</span><br><span class="token punctuation">}</span></code></pre>
<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">close-click-outside</span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>my-details<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><br>    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>summary</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>summary</span><span class="token punctuation">&gt;</span></span><br>    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>button<span class="token punctuation">"</span></span> <span class="token attr-name">aria-controls</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>my-details<span class="token punctuation">"</span></span> <span class="token attr-name">data-du-close-click</span><span class="token punctuation">&gt;</span></span>Close<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<h3 id="close-on-esc" tabindex="-1">Close on <code>esc</code> <a class="direct-link" href="#close-on-esc" aria-hidden="true">#</a></h3>
<p>Closes the <code>&lt;details&gt;</code> when the <code>esc</code> key is hit on the keyboard. Media query is optional.</p>
<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">close-esc</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>(max-width: 767px)<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<h3 id="animate-openclose" tabindex="-1">Animate open/close <a class="direct-link" href="#animate-openclose" aria-hidden="true">#</a></h3>
<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">animate</span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<p>Animates the height of the content when opening and closing the <code>&lt;details&gt;</code>. Ignored automatically if <code>(prefers-reduced-motion)</code> is detected.</p>
<p>Just a full disclosure, the configuration around this one is pretty limited (re: easing and timing). Also this doesn’t support media query scoping yet (not for any technical reason, just haven’t run into this use case yet). Open to contributions here!</p>
<h3 id="toggle-class-on-root-element" tabindex="-1">Toggle <code>class</code> on root element <a class="direct-link" href="#toggle-class-on-root-element" aria-hidden="true">#</a></h3>
<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details-utils</span> <span class="token attr-name">toggle-document-class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>my-class-name<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>details</span><span class="token punctuation">&gt;</span></span>…<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details</span><span class="token punctuation">&gt;</span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>details-utils</span><span class="token punctuation">&gt;</span></span></code></pre>
<p>Adds a <code>class</code> to your <code>&lt;html&gt;</code> element when the <code>&lt;details&gt;</code> is open and removes it when the <code>&lt;details&gt;</code> is closed.</p>
<h2 id="enjoy!" tabindex="-1">Enjoy! <a class="direct-link" href="#enjoy!" aria-hidden="true">#</a></h2>
<p>Wiring up and combining each of these enhancements to <code>&lt;details&gt;</code> really can go a long way in building a lot of complex user interface elements in a pretty straightforward way. In my humble opinion, the super long list of things I’ve built using this is proof of that. I hope you can get some useful mileage out of them too!</p>
</article>


<hr>

<footer>
  <p>
    <a href="/david/" title="Aller à l’accueil"><svg class="icon icon-home">
        <use xlink:href="/static/david/icons2/symbol-defs-2021-12.svg#icon-home"></use>
      </svg> Accueil</a> •
    <a href="/david/log/" title="Accès au flux RSS"><svg class="icon icon-rss2">
        <use xlink:href="/static/david/icons2/symbol-defs-2021-12.svg#icon-rss2"></use>
      </svg> Suivre</a> •
    <a href="http://larlet.com" title="Go to my English profile" data-instant><svg class="icon icon-user-tie">
        <use xlink:href="/static/david/icons2/symbol-defs-2021-12.svg#icon-user-tie"></use>
      </svg> Pro</a> •
    <a href="mailto:david%40larlet.fr" title="Envoyer un courriel"><svg class="icon icon-mail">
        <use xlink:href="/static/david/icons2/symbol-defs-2021-12.svg#icon-mail"></use>
      </svg> Email</a> •
    <abbr class="nowrap" title="Hébergeur : Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33184162340"><svg class="icon icon-hammer2">
        <use xlink:href="/static/david/icons2/symbol-defs-2021-12.svg#icon-hammer2"></use>
      </svg> Légal</abbr>
  </p>
  <template id="theme-selector">
      <form>
          <fieldset>
              <legend><svg class="icon icon-brightness-contrast">
                <use xlink:href="/static/david/icons2/symbol-defs-2021-12.svg#icon-brightness-contrast"></use>
              </svg> 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 src="/static/david/js/instantpage-5.1.0.min.js" type="module"></script>
<script>
    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>