Polypane
@polypane.app
1.8K followers 1.8K following 150 posts
The browser for web developers that care about their craft and users. | Try out for free at https://polypane.app | By @kilianvalkhof.com
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polypane.app
Polypane 26 is here!

Emulate safe-inset-area variables and the small viewport height inside Polypane for the most accurate device emulation available.

Of course there's more, like improvements to inspection, measurement overlays, Chromium 140 and much more.

polypane.app/blog/polypan...
Polypane 26: Accurate device emulation with safe area and small viewport units | Polypane
Polypane 26 brings the most accurate device emulation available anywhere. We now emulate small viewport units (svh) and device-specific safe area insets, two…
polypane.app
polypane.app
Kilian is at Frontmania today to speak about the INTL API! Make sure to grab the magazine for a cool article about Polypane and ask Kilian for some stickers!
A magazine folded open showing an article with the title ‘a browser just for developers’
Reposted by Polypane
paulvanbuuren.nl
Nerds. Als je websites loopt (*) te bouwen, dan wil je de boel testen in een hele goede, complete browser.

Daarom raad ik de browser aan van Nederlands beste browser-bouwer @polypane.app

Ik gebruik 'm al jaren en ik kan nog steeds nieuwe dingen ontdekken:
polypane.app
Polypane. The browser for web developers who care about their craft and users.
Polypane is a powerful desktop browser for web developers, built to streamline responsive design, accessibility, and SEO testing, all in one place.
polypane.app
polypane.app
Custom media queries are actively being worked on in Chromium, so it won't be long until we can update our complete guide to CSS Media queries!

Check it out to get a head start on using custom media queries.

polypane.app/blog/the-com...
The complete guide to CSS media queries | Polypane
Media queries are what make modern responsive design possible. With them you can set different styling based on things like a users screen size, device…
polypane.app
polypane.app
New in Polypane 26: all our devices emulate the correct `safe-area-inset-*` CSS environment variables, as well as the correct small viewport height.

Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
polypane.app
Everything's easily configurable for the folks wanting to check against Chrome-on-iOS or Firefox-on-Android, instead of the 'defaults' of Safari on iOS and Chrome on Android 👍
Reposted by Polypane
kilianvalkhof.com
This was a tiny feature to implement, but I get so much value out of color coding the address bar depending on the domain I'm working on.

Tab customization in @polypane.app: polypane.app/docs/tab-cus...
Polypane app with a yellow-tinted address bar and tab, alongside a blue-tinted tab.
Reposted by Polypane
polypane.app
Polypane 26 is here!

Emulate safe-inset-area variables and the small viewport height inside Polypane for the most accurate device emulation available.

Of course there's more, like improvements to inspection, measurement overlays, Chromium 140 and much more.

polypane.app/blog/polypan...
Polypane 26: Accurate device emulation with safe area and small viewport units | Polypane
Polypane 26 brings the most accurate device emulation available anywhere. We now emulate small viewport units (svh) and device-specific safe area insets, two…
polypane.app
polypane.app
Polypane 26 is here!

Emulate safe-inset-area variables and the small viewport height inside Polypane for the most accurate device emulation available.

Of course there's more, like improvements to inspection, measurement overlays, Chromium 140 and much more.

polypane.app/blog/polypan...
Polypane 26: Accurate device emulation with safe area and small viewport units | Polypane
Polypane 26 brings the most accurate device emulation available anywhere. We now emulate small viewport units (svh) and device-specific safe area insets, two…
polypane.app
Reposted by Polypane
polypane.app
Did you know our CSS Specificity calculator has a 'secret' feature?

If you give it multiple comma separated selectors, you can sort them by specificity and see which one wins!

polypane.app/css-specific...
CSS Selector Specificity Calculator | Polypane
Quickly calculate any CSS selector specificity score along with explanations. With full support for complex CSS selectors.
polypane.app
polypane.app
Help us out? 🙏
kilianvalkhof.com
There's a masive lack of decent up-to-date Android emulation options. Google doesn't have a Pixel 10 emulator in the official Android studio, let alone anything non-Google like Samsung or Xiaomi

If you have an Android device running Chrome 140 & want to help me out adding yours to Polypane, DM me!
polypane.app
Did you know our CSS Specificity calculator has a 'secret' feature?

If you give it multiple comma separated selectors, you can sort them by specificity and see which one wins!

polypane.app/css-specific...
CSS Selector Specificity Calculator | Polypane
Quickly calculate any CSS selector specificity score along with explanations. With full support for complex CSS selectors.
polypane.app
Reposted by Polypane
deanleigh.bsky.social
I just renewed @polypane.app for another year.
I highly recommend it for testing numerous aspects of your site in a single application.
Reposted by Polypane
kilianvalkhof.com
Updated with some progressive enhancement 👍
polypane.app
CSS-only floating focus with anchor positioning

We're using anchor positioning to duplicate our Track Focus debug tool (that shows a floating indicator around focused elements) using purely CSS. Follow the walk-through and check out the demo at the end!

polypane.app/blog/css-onl...
CSS-only floating focus with anchor positioning | Polypane
The Track focus debug tool in Polypane shows a floating outline that follows the keyboard focus around the page. This makes it easier to keep track of where the…
polypane.app
Reposted by Polypane
polypane.app
CSS-only floating focus with anchor positioning

We're using anchor positioning to duplicate our Track Focus debug tool (that shows a floating indicator around focused elements) using purely CSS. Follow the walk-through and check out the demo at the end!

polypane.app/blog/css-onl...
CSS-only floating focus with anchor positioning | Polypane
The Track focus debug tool in Polypane shows a floating outline that follows the keyboard focus around the page. This makes it easier to keep track of where the…
polypane.app
polypane.app
CSS-only floating focus with anchor positioning

We're using anchor positioning to duplicate our Track Focus debug tool (that shows a floating indicator around focused elements) using purely CSS. Follow the walk-through and check out the demo at the end!

polypane.app/blog/css-onl...
CSS-only floating focus with anchor positioning | Polypane
The Track focus debug tool in Polypane shows a floating outline that follows the keyboard focus around the page. This makes it easier to keep track of where the…
polypane.app
Reposted by Polypane
kilianvalkhof.com
-> Polypane
-> Focus mode
-> So smooth.

Bonus:
1. Animated transition between known sizes
2. Zoom way, way larger than your current screen
3. Stress test with random resizes
polypane.app
🧙‍♀️
svillegas.com
Umm, so I finally actually learned about @polypane.app and started a trial today, and now I feel like an unstoppable wizard. 🪄
Reposted by Polypane
kilianvalkhof.com
Exciting! @polypane.app has been selected as one of the Best Companies to Watch in 2025 by the research team of "CEO Vision".

I'm not going to pay the Nominal Sponsorship fee of $1500 to be featured in the magazine but figured I should share the news with you all regardless.
polypane.app
ah. We have @passmail.com whitelisted but not the .net TLD. Should be good now!