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Cascading Style Sheets (CSS) is the web’s core styling language. For web developers, It’s one of the quickest technologies to get started with, but one of the hardest to master. Follow Una Kravets and Adam Argyle, Developer Advocates from Google, who gleefully breakdown complex aspects of CSS into digestible episodes covering everything from accessibility to z-index.

Jun 13, 2024

In this episode Una and Adam continue talking about dialogs and popovers, but this time it's all about animating them into and out of the top layer.. We'll be introducing starting-style, a new mode for transitioning discrete properties, and the overlay property for smooth entry and exit animations. 

top-layer CSS spec →
Four new CSS features for smooth entry and exit animations by Una →
Using @starting-style and transition-behavior for enter and exit stage effects →
Popover on MDN →
:popover-open on MDN →
Dialog and popover animated →
Popover animated with nesting →
What is the top layer? →
overlay property on MDN →
MDN demos →

Una Kravets (co-host)
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Making the web more colorful ✨🎨  Web DevRel @googlechrome Unicorn face host of @toolsday & Designing in the Browser 🎬 

Adam Argyle (co-host)
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@GoogleChrome CSS DevRel; @CSSWG; VisBug maker; punk; CSS/JS/UX addict; 💀🤘