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iOS-style morphing context menu w/ css transitions 👨‍🍳 [popover] api + anchor positioning + transition-behavior: allow-discrete

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jhey ʕ•ᴥ•ʔ

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30,546 views • 4 months ago •via X (Twitter)

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Neat piece is the responsive morph using CSS min() ✨ [popover] { transition-property: display, width, height; transition-behavior: allow-discrete; width: anchor-size(width); @​starting-style { width: min(640px, 100vw - 2rem); }}
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Neat piece is the responsive morph using CSS min() ✨ [popover] { transition-property: display, width, height; transition-behavior: allow-discrete; width: anchor-size(width); @​starting-style { width: min(640px, 100vw - 2rem); }}

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CSS Tip! 🤙 You can create this magnetic :hover effect with CSS anchor positioning, :has, and zero JS 🔥 article { anchor-name: --develop; } ul:has(li:hover) { --anchor: --develop; } ul::after { inset: anchor(var(--anchor) top) anchor(var(--anchor) right) ... ; } How do you keep it clean when entering/exiting the list? Use transition-delay ⭐️ ul:has(li:hover) { --active: 1; } ul::after { opacity: var(--active, 0); transition: opacity 0.2s, inset 0.2s 0.2s; } ul:hover::after { transition: opacity 0.2s 0.2s, inset 0.2s; } This is a cool trick you can use. Delay the opacity on enter and then delay the position on exit. That way you don't get a weird effect on enter/exit 🙏 This one's a "Future" CSS tip 🔮 But, the demo will work in all browsers in some way. The idea is to progressively enhance it. 1. No JavaScript and no Anchor Positioning? Highlight on hover ✏️ 2. No Anchor Positioning? Use JavaScript with a single event listener to update the inset values using elementFromPoint and .closest 🫶 3. If there is Anchor Positioning support, use that and don't fire the JavaScript. You can check with CSS.supports('anchor-name: --anchor') ✨ That's it! CodePen.IO link below! 👇

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