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Overview
Polypane has everything a browser has, plus all the tools you need to build responsive, fast, accessible, and SEO-friendly websites and apps, with multi-viewport synchronised previews and accessibility tooling.
News
Polypane 30.1: Selector specificity insights, server HTML validation, and more
Polypane 30.1 adds selector specificity highlighting to the elements panel, a new server-sent HTML view in the sources panel, passkey support on Linux and a bunch of improvements and fixes. Like Polypane 30 this release is built on Chromium 152. spa...
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Polypane 30: Playgrounds, Side Panel extension API, updated video recording and Chromium 152
Polypane 30 introduces Playgrounds so you can open directories as real HTTPS URLs in seconds, adds support for the Side Panel extension API, brings major Network panel improvements, and includes a fully rewritten video recording implementation that's much
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Cheatsheets for flex, grid, anchor positioning and invoker commands
For CSS Day this year we created a set of cheatsheets explaining Flexbox, Grid, Anchor positioning and Invoker commands. They came out beautifully and a lot of people really liked them at our booth, so we decided to make them available as free downloads a
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Experimenting with the new pure CSS random() function
CSS is getting a random() function that lets you set properties with a random value, opening up a ton of interesting creative possibilities. In this article, I'm taking an early look at the function to see how it works and where the gotchas are (and there
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Using safe-area-inset to build mobile-safe layouts
Modern phones are not simple rectangles. They have rounded corners, camera cutouts, dynamic islands, and home indicators that double as gesture areas. Browsers know the dimensions of all of these and expose the parts that could obscure content as safe are
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