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diff --git a/build/tabbed-content/index.html b/build/tabbed-content/index.html new file mode 100644 index 0000000..295a712 --- /dev/null +++ b/build/tabbed-content/index.html @@ -0,0 +1,250 @@ +<!doctype html> +<html lang="en" id="top"> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <link rel="icon" href="data:,"> + <title>Tabbed Content Without JavaScript</title> + <link href="https://bt.ht/atom.xml" type="application/atom+xml" rel="alternate" title="Atom feed for blog posts" /> + <style>*{box-sizing:border-box;}body{font-family:sans-serif;margin:0 auto;max-width:650px;padding:1rem;}img{max-width:100%;}pre{overflow:auto;}table{text-align:left;width:100%;}</style> +</head> + +<nav> + <a href="#menu">Menu ↓</a> +</nav> + +<main> +<h1>Tabbed Content Without JavaScript</h1> +<p>2019-01-28</p> +<p>Creating tabs is a fairly trivial and common practice in web design, but many times it requires JavaScript to properly implement. Fortunately it <em>is</em> possible to create tabbed content with only using CSS.</p> +<p><img src="/public/images/tabbed-content.png" alt="Tabbed elements with only CSS" /></p> +<p><a href="https://codepen.io/bradleytaunt/pen/abjmayw">Live CodePen Example</a></p> +<hr /> +<p><div class="message"> +<p><strong>Sidenote:</strong></p> +<p>While this method is semantic and accessible, you might consider using a pre-existing plugin for tabbed data.</p> +<p>This component tends to feel a little "stiff" compared to more fleshed out variations available. This pure CSS version is better suited as a fallback for when users have disabled JavaScript.</p> +</div></p> +<h2>The HTML</h2> +<p>The skeleton for this component is fairly basic - we just need the following structure:</p> +<ol> +<li>Parent element for each tab item</li> +<li>Default radio input</li> +<li>Label linked to corresponding input</li> +<li>Inner content associated with each tab item</li> +</ol> +<pre><code><!-- Simple main container for all elements --> +<div class="tabs"> + + <!-- Parent container holding for individual tab item --> + <div class="tab-item"> + + <!-- Default radio input --> + <input class="tab-input" type="radio" name="tabs" id="tab-1"> + + <!-- Label connected to radio input via `id` and `for` attributes --> + <label class="tab-label" for="tab-1">Tab 1</label> + + <!-- Full inner content of current tab item --> + <div class="tab-content">Content goes here</div> + + </div> + +</div> +</code></pre> +<p>Full HTML for reference:</p> +<pre><code><div class="tabs"> + + <div class="tab-item"> + <input class="tab-input" type="radio" name="tabs" id="tab-1"> + <label class="tab-label" for="tab-1">Tab 1</label> + <div class="tab-content">Content goes here</div> + </div> + + <div class="tab-item"> + <input class="tab-input" type="radio" name="tabs" id="tab-2"> + <label class="tab-label" for="tab-2">Tab 2</label> + <div class="tab-content">Content goes here</div> + </div> + + <div class="tab-item"> + <input class="tab-input" type="radio" name="tabs" id="tab-3"> + <label class="tab-label" for="tab-3">Tab 3</label> + <div class="tab-content">Content goes here</div> + </div> + +</div> +</code></pre> +<h2>The CSS</h2> +<p>First, we need to set each <code>input</code>, <code>label</code> and inner content into their own parent containers:</p> +<pre><code>/* Main parent that holds all contents */ +.tabs { + height: 100%; + min-height: 250px; + position: relative; +} + +/* Each tab items (includes heading & content) */ +.tab-item { + display: inline; +} +</code></pre> +<p>Next, we will hide the default <code>radio</code> input and design our labels to resemble a basic web tab element. The <code>z-index</code> property on the label is important for how we will be stacking our content on the z-axis (labels above inner content for example).</p> +<pre><code>/* Hide the default radio inputs */ +.tab-input { + position: absolute; + visibility: hidden; +} + +/* The main tab headings */ +.tab-label { + background: white; + box-shadow: inset 0 -4px 4px rgba(0,0,0,0.02); + color: lightgrey; + cursor: pointer; + display: inline-block; + font-weight: 600; + margin: 0 5px 0 0; + padding: 10px 20px; + position: relative; + text-align: center; + z-index: 0; +} +</code></pre> +<p>The main inner content of each tab needs to have an <code>absolute</code> position set as it's default, since the one currently selected will switch to <code>relative</code> on mobile (more on that in a moment):</p> +<pre><code>/* The inner tab content */ +.tab-content { + background: white; + bottom: 0; + box-shadow: 0 6px 8px rgba(0,0,0,0.02); + left: 0; + overflow: scroll; + padding: 20px; + position: absolute; + right: 0; + top: 50px; + z-index: 0; +} +</code></pre> +<p>The final step is just telling the browser to style both the <code>label</code> and inner content of the currently selected radio <code>input</code>:</p> +<pre><code>/* Style the currently selected tab label */ +.tab-input:checked + .tab-label { + border: 1px solid #eee; + border-bottom: 0; + box-shadow: 0 -6px 8px rgba(0,0,0,0.02); + color: #268bd2; + z-index: 2; +} + +/* Show the currently selected tab content */ +.tab-input:checked ~ .tab-content { + border: 1px solid #eee; + z-index: 1; +} +</code></pre> +<p>It's as simple as that! For reference, here is the entire CSS file for easier access:</p> +<pre><code>/* Main parent that holds all contents */ +.tabs { + height: 100%; + min-height: 250px; + position: relative; +} + +/* Each tab items (includes heading & content) */ +.tab-item { + display: inline; +} + +/* Hide the default radio inputs */ +.tab-input { + position: absolute; + visibility: hidden; +} + +/* The main tab headings */ +.tab-label { + background: white; + box-shadow: inset 0 -4px 4px rgba(0,0,0,0.02); + color: lightgrey; + cursor: pointer; + display: inline-block; + font-weight: 600; + margin: 0 5px 0 0; + padding: 10px 20px; + position: relative; + text-align: center; + z-index: 0; +} + +/* The inner tab content */ +.tab-content { + background: white; + bottom: 0; + box-shadow: 0 6px 8px rgba(0,0,0,0.02); + left: 0; + overflow: scroll; + padding: 20px; + position: absolute; + right: 0; + top: 50px; + z-index: 0; +} + +/* Style the currently selected tab label */ +.tab-input:checked + .tab-label { + border: 1px solid #eee; + border-bottom: 0; + box-shadow: 0 -6px 8px rgba(0,0,0,0.02); + color: #268bd2; + z-index: 2; +} + +/* Show the currently selected tab content */ +.tab-input:checked ~ .tab-content { + border: 1px solid #eee; + z-index: 1; +} +</code></pre> +<h2>Don't forget about mobile</h2> +<p>With only a few extra lines of CSS we can ensure that our custom tabs will stack on top of each other and look solid on mobile devices:</p> +<pre><code>@media(max-width:38em) { + .tab-label { + display: block; + width: 100%; + } + .tab-content { + display: none; + } + .tab-input:checked ~ .tab-content { + bottom: auto; + display: block; + position: relative; + top: auto; + } +} +</code></pre> +<h2>One minor caveat</h2> +<p>Even though I'm a pretty big fan of implementing tabs this way, there is a small drawback:</p> +<p>The <code>height</code> of the inner content doesn't grow dynamically since it defaults as <code>absolute</code>, so a <code>min-height</code> or <code>height</code> value is required on the parent element. This could become a problem in certain situations where you don't have the luxury of setting a static height.</p> +<p>Other than that, enjoy building some JavaScript-free tabs!</p> +<footer role="contentinfo"> + <h2>Menu Navigation</h2> + <ul id="menu"> + <li><a href="/">Home</a></li> + <li><a href="/projects">Projects</a></li> + <li><a href="/uses">Uses</a></li> + <li><a href="/wiki">Wiki</a></li> + <li><a href="/resume">Resume</a></li> + <li><a href="/colophon">Colophon</a></li> + <li><a href="/now">Now</a></li> + <li><a href="/donate">Donate</a></li> + <li><a href="/atom.xml">RSS</a></li> + <li><a href="#top">↑ Top of the page</a></li> + </ul> + <small> + Built with <a href="https://git.sr.ht/~bt/barf">barf</a>. <br> + Maintained with ♥ for the web. <br> + Proud supporter of <a href="https://usefathom.com/ref/DKHJVX">Fathom</a> & <a href="https://nextdns.io/?from=74d3p3h8">NextDNS</a>. <br> + The content for this site is <a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>.<br> The <a href="https://git.sr.ht/~bt/bt.ht">code for this site</a> is <a href="https://git.sr.ht/~bt/bt.ht/tree/master/item/LICENSE">MIT</a>. + </small> +</footer>
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