The Curious Engineer

All blogs / Frontend / CSS / browsers

Polypane Blog

polypane.app

See every screen, device & user preference in sync while you build. Plus all the tools to ship responsive, fast, accessible and SEO-friendly sites.

Frontend / CSS / browsersDev tools / editors / IDEs

’19’20’21’22’23’24’25’26
Posts
150 from 30 Mar 2019 to 29 Sep 2026
Posting
weekly (31 in the last year)
Kind
company blog
Feed
https://polypane.app/rss.xml

2026 28

  1. Polypane 31: Canvas layout, elements panel improvements and Chromium 155
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  13. The root scroller and how not to lose it
  14. Polypane 30.1: Selector specificity insights, server HTML validation, and more
  15. Polypane 30: Playgrounds, Side Panel extension API, updated video recording and Chromium 152
  16. Cheatsheets for flex, grid, anchor positioning and invoker commands
  17. CSS breakpoints used by popular CSS frameworks
  18. Experimenting with the new pure CSS random() function
  19. The complete guide to CSS media queries
  20. How to find the cause of horizontal scrollbars
  21. Using safe-area-inset to build mobile-safe layouts
  22. Polypane 29: New network panel, snippet store and Chromium 148
  23. Find and fix accessibility issues with Polypane
  24. The Intl API: The best browser API you're not using
  25. How to debug the @starting-style at-rule in Polypane
  26. Polypane 28: Project improvements, Elements panel updates and Chromium 146
  27. Understanding the fundamentals of CSS Layout
  28. Not All Browser APIs Are "Web" APIs

2025 21

  1. Polypane 27.1: Expanding Portal
  2. Polypane 27: Projects, a Snippets Panel and Chromium 142
  3. Using chrome-devtools-mcp with Polypane
  4. Polypane 26: Accurate device emulation with safe area and small viewport units
  5. CSS-only floating focus with anchor positioning
  6. Capturing screenshots in Polypane
  7. Polypane with Stefan Judis
  8. Polypane 25.1: DRM support and bug fixes
  9. Polypane on the Winging It Live stream
  10. HTML Form Inspector: inspect and debug your forms online
  11. Polypane 25: browser extensions with Manifest v3, form outlines and Chromium 138
  12. Polypane 24.1: New Measure tool, XML viewer and Find by CSS selector
  13. Polypane on the Software Engineering Daily Podcast
  14. Polypane on the Pixels with purpose Podcast
  15. Polypane 24: Recording, 3D view, Custom tab colors and HTML editing
  16. The WebAIM Million 2025: Solving the most common issues
  17. The CSS Transform property and individual transforms are additive
  18. Decoding CSS Selectors: :has(:not) vs :not(:has)
  19. Polypane is hiring Igalia to work on Chromium
  20. Polypane 23.1
  21. Polypane 23

2024 20

  1. Always open localhost in your development browser
  2. Polypane 22.1: true browser tabs and a new split layout
  3. The devtools features you wish you had, available in Polypane
  4. Clever Polypane Debugging Features I'm Loving by Ryan Trimble
  5. Polypane 22
  6. Polypane 21.1
  7. Polypane on the ConTejas Code Podcast
  8. Polypane 21
  9. Polypane 20.1: The accessibility tree
  10. Getting stuck: all the ways position:sticky can fail
  11. Polypane on the JS Party Podcast
  12. Polypane 20: Browser features and performance
  13. How to find broken links with Polypane
  14. Polypane 19: Workflow improvements
  15. How to check your site in different languages and writing modes
  16. Forced colors explained: A practical guide
  17. Field-sizing just works!
  18. Polypane 18: Introducing Polypane Portal
  19. My take on fading content using transparent gradients in CSS
  20. Polypane 17.1

2023 21

  1. Experimental Chromium Web Platform Features
  2. Polypane 17: Meta panel updates, Reference image split slider and Chromium 120
  3. Using Selectlist in React
  4. Developing for color blindness with Polypane
  5. Responsive design ground rules (updated for 2026)
  6. Polypane 16: workflow improvements, scoped styles and Chromium 118
  7. Where to put text so it doesn't overlap in the new X (Twitter) preview (2023)
  8. Using the Intl segmenter API
  9. Announcing Polypane Cloud: Accessibility testing for entire sites
  10. Polypane 15: Fully featured browser in the browse panel, performance improvements, Chromium 116 and more
  11. Offset parent and stacking context: positioning elements in all three dimensions
  12. Polypane 14.1: Container query support, forced element state and contrast lines in color pickers
  13. Polypane 14
  14. ColorContrast.App: a new place for our color contrast checker
  15. Polypane 13.1
  16. Polypane on PodRocket
  17. Using Polypane to check a website with James Q Quick
  18. Building a lightbox with the Dialog element
  19. Polypane 13: CSS Nesting, extension support in beta, search by selector and Chromium 110
  20. Polypane on Syntax.fm
  21. :where() :is() :has()? New CSS selectors that make your life easier

2022 16

  1. Polypane 12: introducing the Command bar
  2. Polypane 11: JSON viewer, new accessibility tools, Chromium 106, iPhone 14 devices and screenshot updates
  3. The breakpoints we tested in 2021 & 2022, and the ones to test in 2023
  4. Thanks iPhone 14, designing for device sizes is dead
  5. How Blhack doubled their development speed with Polypane
  6. How using Polypane for Nureply helped Onur learn to love the web
  7. How Matchless Web halved their mobile optimization time
  8. How Short Hills Design saves over $700 per year thanks to Polypane
  9. Polypane 10: detachable panel, navigation sync, element screenshots and more
  10. Polypane 9.1: Form autofilling, fast overview screenshot and outline panel overlays
  11. Polypane 9: Screenshot editor, structured data support and new debug tools
  12. Create a Polypane account with GitHub
  13. Polypane 8.1: Resizable element tree, disable JS feature, new debug tools and more
  14. How we made the State of CSS more responsive and accessible
  15. Polypane is now part of the GitHub Education Intro to Web Dev pack
  16. Polypane 8: better Elements Inspector, new syncing features, Chromium 98 and more

2021 19

  1. Improving your CLS and LCP Core Web Vitals
  2. The EyeDropper API: Pick colors from anywhere on your screen
  3. Polypane 7
  4. How TeliportMe is moving to the web with Polypane
  5. Polypane 6.3: Tunnel vision simulator, webmanifest support, updated UI
  6. Detecting media query support in CSS and JavaScript
  7. Polypane 6.2: HTML validation, robots.txt support, RTL emulation and more
  8. Creating websites with prefers-reduced-data
  9. Fixing contrast issues, on your own site and elsewhere
  10. A11y tooling in Polypane (video)
  11. Polypane 6.1: Readability, Content Chaos and rewritten event sync engine
  12. The perfect responsive menu (2021)
  13. Polypane 6: Peek, Webvitals, new simulators & Chromium 91
  14. Don't you forget about me: overlooked breakpoints in responsive design.
  15. Polypane 5.1: Web components support
  16. Checking webpage quality in 5 minutes with Polypane
  17. Polypane 5: Console popups, performance and focus overview
  18. How Maurits Meester combines front-end development with beer
  19. Faking container queries with CSS Grid

2020 17

  1. Debug your visual hierarchy with the squint test
  2. How Sergio Mattei made the next Makerlog 6x faster with Polypane
  3. Polypane 4: Unified Console, DOM tree in elements panel
  4. Polypane demo with Shawn @swyx Wang
  5. Polypane 3.3: Grids and guides, horizontal overflow detection and updated UI
  6. How Earnworthy uses Polypane to audit landing pages and land 25% more customers
  7. Polypane ❤ Tumult Hype. New integration
  8. How Code& increased their efficiency by 500% maintaining and improving websites like Freshwater SLSC
  9. How Red Pixel Themes uses Polypane
  10. Polypane 3.2: Accessibility and viewport sizing
  11. Polypane 3.1: New elements panel
  12. 8 ways to increase your productivity as a web developer (in 2021)
  13. Color contrast checker that makes suggestions for better colors
  14. Polypane 3: browser tabs and dark mode emulation
  15. Polypane is now part of the GitHub Student Developer Pack
  16. 4 CSS layouts without using media queries
  17. Polypane 2.1: Edit all your panes at the same time

2019 8

  1. Polypane 2: device emulation, new modes and simulators
  2. Give your eyes some rest with dark mode in Polypane
  3. Polypane 1.2: Dark mode, Full page screenshots, Live reloading and more
  4. Polypane 1.1 release notes
  5. Polypane 1.3: Full page mode and screenshot improvements
  6. Responsive CSS breakpoints for the top 50 websites 2019
  7. Why you need a development browser
  8. Roadmap, and why Polypane is a subscription