I built a Material Design-style Floating Action Button (FAB) without using any JavaScript. This was achieved using only HTML and CSS, leveraging anchor links and the ":target" selector to control visibility and create the open/close functionality. Clicking the FAB opens a menu with links to different actions, and clicking a close button hides the menu. This approach does have the trade-off of adding entries to the browser history, but it's a pure HTML/CSS solution for a common UI element.
I'm experimenting with mobile-friendly table of contents designs for HTML5Rocks. The current ToC takes up too much screen space, hindering access to content. My goal is to improve user experience by getting readers to the content faster. My "Bottom ToC" experiment anchors the ToC to the bottom, expanding on tap and collapsing when the main content is tapped. It uses position: fixed and the :active pseudo-class, requiring no JavaScript and keeping the rendered HTML consistent between desktop and mobile. Though it has minor scrolling issues, it effectively minimizes initial ToC screen coverage while remaining accessible.
