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update: now you can use css progress() for adaptive radius, shadow, etc. ↓ same trick, but progress() does the division + clamps for you! 🧑🍳 .card__surface { --r: 42px; --g: 24px; border-radius: calc( progress((100vi - 100cqi) / 2, 0px, var(--g)) * var(--r) ); }
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![CSS Tip! 🚥 You can create these trending expanding scroll indicators with scroll-driven animations and flex 🤙 .indicator { animation: grow; animation-range: contain calc(50% - var(--size)...; animation-timeline: var(--card); } @keyframes grow { 50% { flex: 3; }} What's the trick? Put the indicators in a container using flex layout and set a width larger than the number of indicators 😉 .indicators { aspect-ratio: 7 / 1; display: flex; } Importantly, set no gap 🤏 To mimic the gap set a transparent border on each indicator and set the background using padding-box .indicator { background: linear-gradient(#fff, #fff) padding-box; border-radius: 50px; border: 4px solid transparent; } Now for the animation. You want to create a view-timeline for each card that moves across 🤙 li:nth-of-type(1) { view-timeline: --one inline; } li:nth-of-type(2) { view-timeline: --two inline; } Make sure they use the inline axis too! The trick is hoisting these view-timeline so the indicators can use them with timeline-scope 👀 .track { timeline-scope: --one, --two, ...; } All that's left is for you to create the animation piece using some calc with the card size ⚡️ .indicator { --size: calc(var(--card-width) * 0.9); animation: grow both linear; animation-range: contain calc(50% - var(--size)) contain calc(50% + var(--size)); } .indicator:nth-of-type(1) { animation-timeline: --one; } .indicator:nth-of-type(2) { animation-timeline: --two; } @keyframes grow { 50% { flex: 3; }} And there you have it, responsive scroll indicators using CSS scroll-driven animations 😎 Sprinkle a little JavaScript to make them clickable and scroll the the right card ✨ const shift = (event) => { if (event.target.tagName === "BUTTON") { const index = [...event.target.parentNode.children].indexOf(event.target); const item = document.querySelector(`li:nth-of-type(${index + 1})`); item.scrollIntoView({ behavior: "smooth", inline: "center" }); } }; As always, any questions or suggestions, let me know. I've put a JavaScript fallback in to use GSAP in browsers that don't have scroll-driven animations 🫶 CodePen.IO link below! 👇](https://image.24vids.com/tw-1743737760773705824/ext_tw_video_thumb/1743734045748641792/pu/img/nFQ1z9S-iN4AY8SN.jpg)
![CSS Tip! 💪 You can create these tab controls with CSS :has() + radio buttons ✨ .tabs:has(input:nth-of-type(3)) { --count: 3; } .tabs:has(:checked:nth-of-type(3)) { --active: 2; } .tabs::after { translate: calc(var(--active, 0) * 100%) 0; width: calc(100% / var(--count)); } Two CSS :has() tricks here combined with a rendering trick 🤙 The tab control is a container using display: grid. You can use :has() to count the number of tabs in the container: .tabs:has(input:nth-of-type(3)) { --count: 3; } .tabs:has(input:nth-of-type(4)) { --count: 4; } Using the cascade, the last valid :has() gives you the number of tabs 🫶 Once you know the number of tabs, you know how to size the indicator: .tabs::after { content: ""; position: absolute; height: 100%; width: calc(100% / var(--count)); } It's a pseudoelement that uses --count to determine its size 📏 The next :has() trick is determining which tab is active or :checked as it's an input [type=radio] .tabs:has(:checked:nth-of-type(2)) { --active: 1; } .tabs:has(:checked:nth-of-type(3)) { --active: 2; } You can use a zero-indexed translation here. If the second input is :checked, set --active: 1, then translate the pseudoelement on the tabs to that position 👉 .tabs::after { translate: calc(var(--active, 0) * 100%) 0; } The last rendering trick is using mix-blend-mode 👀 The tabs have a black background-color, the pseudoelement is white, and the label text is white. When you use mix-blend-mode: difference on the pseudoelement it will give this effect that the text transitions from white to black sliding across 😎 .tabs::after { color: hsl(0 0% 100%); mix-blend-mode: difference; } You can totally mix up the colors here though and go with a different effect. The mechanics of how you can use CSS :has() is the main point here 🙏 As always, any questions, suggestions, etc. let me know CodePen.IO link below! 👇 (There's even a Tailwind CSS play for this one too 👀)](https://image.24vids.com/tw-1746099478656901617/ext_tw_video_thumb/1746099293872898048/pu/img/oonp9Ek6MULFcFjk.jpg)
![CSS Tip! 🤯 You can create a CSS-only version of this balance slider using a scroll animation on the underlying input[type=range] 🚀 ::-webkit-slider-thumb { view-timeline: --thumb inline; } Scroll animation driven by the slider thumb animates a number between the "min" and "max" of the range 😅 @property --value { inherits: true; initial-value: 0; syntax: ' '; } @keyframes sync { to { --value: 100; }} Tie that up to the contain animation-range ⚡️ .control { animation: sync both linear reverse; animation-timeline: --thumb; animation-range: contain; } Hoist the view timeline so all the parts of the control can use it! .control { timeline-scope: --thumb; } Use that value in a counter which is used for the labels. Create a low and a high for each side 😇 .control__label { counter-reset: low var(--value) high calc(100 - var(--value)); } .control__label::before { content: "COFFEE " counter(low) "%"; } .control__label::after { content: counter(high) "% MILK"; } That's the magic of updating the label values ✨ For the big track, it's a fake track. You can make use of the same --value property and do some calc() to work out the width of each part. .control__track::before { width: calc(var(--value) * 1% - 0.5rem); background: var(--coffee); border-radius: 4px; transition: width 0.1s; } The width leaves a little gap for the indicator piece 🤙 The color calculation for --coffee isn't too wild but again you can use the same --value .control__track { --coffee: hsl(24 74% calc( 24% + (30% * ((100 - var(--value, 0)) / 100)) / 1 ) / 0.4); } Now for the last piece. Making the track change height. You could set up another custom property and animate its value using the --thumb timeline too 🔥 @property --shift { initial-value: 0; inherits: true; syntax: ' '; } @keyframes shift { 0%, 31%, 61%, 100% { --shift: 0; } 32%, 60% { --shift: 1; } } Then use that --shift to update the translation of the label and height of the track 🤓 .label { transform: translateY(calc(var(--shift) * 50%)); transition: transform var(--speed) var(--timing); } Cool part here is that you can use the control to work out the @keyframes percentages 😅 Oh. And the timing for that little bounce? Use the linear() function 😎 :root { --timing: linear( 0, 0.5007 7.21%, 0.7803 12.29%, 0.8883 14.93%, 0.9724 17.63%, 1.0343 20.44%, 1.0754 23.44%, 1.0898 25.22%, 1.0984 27.11%, 1.1014 29.15%, 1.0989 31.4%, 1.0854 35.23%, 1.0196 48.86%, 1.0043 54.06%, 0.9956 59.6%, 0.9925 68.11%, 1 ); } Should probably do a video on this one. Lots of little custom property tricks for sure! 💯 It's not too far off the range slider with the tooltip that came up previously As always, any questions, let me know! Also, this one only works in Chrome currently ✅🥲 This one's a bit rocket science ha 🚀 CodePen.IO link below! 👇](https://image.24vids.com/tw-1748809599598399792/ext_tw_video_thumb/1748804672406843392/pu/img/xbvSosI5c_q3Oq2B.jpg)
