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CSS Trick! 🤙 What's powering this button effect? One property ⭐️ You can create the effect by placing a button over your content and using mix-blend-mode 🫶 button { mix-blend-mode: difference; 👈 position: fixed; } It's a really easy one to play around with and you can get some... show more
177,795 views • 2 years ago •via X (Twitter)
10 Comments
Simple but awesome 🙌
Totally a gem of CSS! ✨
Love this CSS trick! That little property offers a creative way to make buttons stand out! I can see it working really well with an art gallery site 🎨
Where’s the link?
I think this may not pass the accessibility test
@AirdateMe had no idea they implemented blend modes, awesome! Looks like I'm late to the game. I imagine this is a rather taxing visual property. Browser Compatibility:
Could this be used for light/dark modes? Someone mentioned there could be performance implications.
Performance issues are going to be limited. Some very low power devices might struggle. Impossible to ascertain a number on that. For the most part, it's usually more of an a11y concern because it has unpredictable nature of reacting with what's underneath.
Please don't spread this terrible feature, its a performance killer. Make some performances test :)
Add also "blur" ? 🤔
![CSS Tip 🤙 You can create this header effect using position: sticky, clip-path, and custom properties 🔥 (Video 👀) header { position: sticky; top: var(--margin); } main { clip-path: inset(var(--header) 0 0 0);) } No mix-blend-mode or animations required ✨ What's the trick then? 🧐 Duplicate the header element first. Then fix the positioning of one behind the content. header[aria-hidden] { position: fixed; top: 0; margin-top: var(--margin); } Clip the top of the content to reveal the fixed header and put a sticky-positioned header inside it that matches up in position and size ✂️ :root { --header: calc(var(--margin) + var(--font-size)); } main { clip-path: inset(var(--header) 0 0 0); } header { position: sticky; top: var(--margin); } Make your life easier with custom properties 🙌 As the body scrolls, the fixed header gets covered by the clipped content and creates the effect ✨ And because the sticky header is "stuck" it reveals itself as the content goes out of view 😍 This one's pretty cool. You can set the font color to whatever you want. At first glance, it looked like it was a mix-blend-mode thing. It doesn't have to be! Think about it and lean into z-indexing 🫶 Watch the video to get an idea of things with the exploding view 🤯 Any questions, etc. let me know! Will likely do a YouTube video on this one too! 🙏 CodePen.IO link below! 👇](https://image.24vids.com/tw-1742391976517927321/ext_tw_video_thumb/1742387238879514624/pu/img/qhFKDDbPrYvBH8B6.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 Trick 🤙 You can create these tab bar controls by using :has() to count the number of tabs ⭐️ .tabs:has(input:nth-of-type(3)){--count: 3;} .tabs:has(:checked:nth-of-type(3)){--active: 200%;} .tabs::after{ translate:var(--active) 0;} Let's break it down in this ! 📼 Couple of CSS :has() tricks here combined with custom properties 😎 First things first, lay out the tabs using display: grid. This gives you a way to create equal-width tabs 🙏 .tabs { display: grid; grid-auto-flow: column; } Then you use :has() to count the number of tabs and store that in a custom property 🤓 .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 🫶 Using the tab count, you can size the tab indicator. For the tab indicator, use the tabs pseudoelement: .tabs::after { content: ""; position: absolute; height: 100%; width: calc(100% / var(--count)); } See how you can use --count to determine its size 📏 Next, use :has() to determine which tab is active or :checked with 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; } Or you could set active to the translation: .tabs:has(:checked:nth-of-type(2)) { --active: 100%; } Setting the custom property allows you to use the index elsewhere if you need it 🤙 The final piece 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-1750370338041647245/ext_tw_video_thumb/1750367384505081856/pu/img/ZVW6XE5SU4mBEB5M.jpg)
![CSS Tip! ✨ You can create icon sprite animations using the steps() animation-timing function 🤙 You could use this to create little icon button animations, etc. 😎 But how do you do it? Like this 👇 button img { object-fit: cover; object-position: 0 0; } The image is a sprite strip of the frames in the animation. To animate the frames, you do something like this: [aria-pressed=true] img { animation: play 0.5s steps(20) forwards; } @ keyframes play { to { object-position: 100% 0; } } We are toggling aria-pressed in our scripts to show a pressed state and we can then fire the animation to play our sprite 🎉 Check out the video that breaks things down a little bit CodePen.IO link blow! 👇](https://image.24vids.com/tw-1694442289047703873/ext_tw_video_thumb/1694440593613557760/pu/img/OB1gtiLZhnylcC9e.jpg)
