Alphabet Index Unfold
A contextual definition unfolds beside the hovered letter in an alphabetical index.
A contextual definition unfolds beside the hovered letter in an alphabetical index.
Live Demo
Hover over the element or use Tab to focus.
Source Code
Copy the HTML, CSS or JavaScript you need for your project.
HTML
<nav class="tbx-1153" aria-label="Glossary index"><a href="#index-a"><span class="tbx-1153__alpha">A</span><span class="tbx-1153__desc">Animation</span></a><a href="#index-b"><span class="tbx-1153__alpha">B</span><span class="tbx-1153__desc">Background</span></a><a href="#index-c"><span class="tbx-1153__alpha">C</span><span class="tbx-1153__desc">Component</span></a></nav>CSS
.tbx-1153{box-sizing:border-box;display:flex;gap:7px;width:min(310px,100%);padding:15px;background:#f3f5fa;border:1px solid #d3dcef;border-radius:10px;font-family:system-ui,sans-serif}
.tbx-1153 a{box-sizing:border-box;display:flex;flex:1 1 0;min-width:0;align-items:center;gap:6px;justify-content:center;padding:11px 6px;background:#dce7f4;border-radius:5px;color:#29445d;text-decoration:none;overflow:hidden;transition:flex-grow .48s cubic-bezier(.18,.8,.2,1),background .3s}
.tbx-1153__alpha{font-size:21px;font-weight:850;flex:none}.tbx-1153__desc{font-size:10px;font-weight:650;white-space:nowrap;max-width:0;opacity:0;overflow:hidden;transition:max-width .48s,opacity .4s}
.tbx-1153 a:is(:hover,:focus-visible){flex-grow:3;background:#b9d5f3}.tbx-1153 a:is(:hover,:focus-visible) .tbx-1153__desc{max-width:95px;opacity:1}
.tbx-1153 a:focus-visible{outline:3px solid #5276a8;outline-offset:3px}
@media (prefers-reduced-motion: reduce) { .tbx-1153, .tbx-1153 *, .tbx-1153::before, .tbx-1153::after, .tbx-1153 *::before, .tbx-1153 *::after { animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important } }
How to Use
Insert the HTML and add the CSS to your stylesheet. Adjust colors and sizes and avoid class conflicts.
Use Case
Useful for directory sections and navigation menus.
Technical Notes
Keep controls usable on touch devices. Test keyboard focus and reduced-motion preferences.
Mobile: Ensure the interactive content remains accessible without hover on touch devices.
Browser: Uses modern CSS. Check behavior in the browsers you support.
Reduced Motion: Check that prefers-reduced-motion is respected.