CSS Circle Focus Effect

Very rad demo by Adam Argyle, which gives you a Spotlight / Focus effect upon pressing the Option/Alt key. Also works on Mobile. (Focus the CodePen embed first) See the Pen Radial focus effect with mask-image by Adam Argyle (@argyleink) on CodePen. It basically is a fixed grey overlay with a mask-image on top that …

Morse Code Translator (HTML & CSS)

I have no idea how this works, but it’s amazing: See the Pen Morse Code Translator (HTML & CSS) by Lillian Kodi (@lillian-kodi)on CodePen. By Lillian Kodi who created this amazing HTML+CSS Calculator before. As only Chromium supports animating custom properties (Houdini FTW!) it won’t work in Safari nor Firefox. For reference, you can see …

Pure HTML + CSS Calculator

Let this blow your mind: a functioning calculator done using only HTML and CSS by Lillian Kodi. Leverages the Checkbox Hack and the Space Toggle Trick. Crazy. As you may notice the option to divide is missing. I guess it was omitted because / is a character that might throw the parser off due to …

Smooth Scrolling Sticky ScrollSpy Navigation, with CSS fixed backgrounds

Davor Suljic created a fork of my Smooth Scrolling Sticky ScrollSpy Navigation that — instead of using IntersectionObserver — uses some background magic to highlight the active navigation items. The result is a “Pure CSS” implementation: If you turn on an outline on one of the content sections it becomes clear how it exactly works: …

Recreating the Apple Keynote Event animation using SVG, Canvas, and GreenSock

Louis Hoebregts recreated the animation of last Apple’s recent Keynote Event using SVG, Canvas, and GreenSock: See the Pen Apple Keynote animation by Louis Hoebregts (@Mamboleoo) on CodePen. Crazy! 🤯 If you’re curious to see how he’s done it, in the demo below he breaks it down step by step: See the Pen Apple Keynote …

Progress Nav with IntersectionObserver

In Table of Contents with IntersectionObserver on CSS-Tricks, Chris Coyier talks about sticky table of contents on long pages whose active state updates as you scroll. When talking about those, you can not not mention the wonderful Progress Nav by Hakim El Hattab. Final version of the progress nav! Switched to SVG and made it …

CSS background-clip Demo: Text with Animated Emoji

Fun demo by Elad Shechter: See the Pen Background-clip: text with Animated Emoji by Elad Shechter (@elad2412) on CodePen. Behind it are two techniques: The 👻 emoji is set as the background-image of the text. To do so one must wrap it inside an SVG, and successively inject the SVG using a Data URL. To …

Getting the Mouse Position using CSS

For his post How to Map Mouse Position in CSS on CSS-Tricks, Amit Sheen created this lovely demo: The demo does use CSS Custom Properties for the X/Y position of the mouse, but they’re not injected using JavaScript. Instead, Amit uses the same technique as used in CSS-Only Direction Aware Hover: capture the hover on …