Documentation
Learn how Polypane improves your workflow
Experimental Chromium features
Polypane is a browser for developers, so it comes with some experimental Chromium features turned on by default. This means you can use Polypane to try out upcoming features before they make their way into regular browsers!
Enabled features
Prefers-reduced-data
Prefers reduced data is a new media query that lets visitors signal they want to preserve data. You can emulate it in Polypane by going to the emulation section above a pane and toggling "prefers-reduced-data" to "reduce".
We wrote an article about what you can do with prefers-reduced-data, read that here: Creating websites with prefers-reduced-data.
Page Transition API
The page transition api will let you create animations between the current page and new pages on your domain by declare animations between elements in your CSS.
Scroll-timeline
With scroll-timeline you can link an animation to the scroll position of an element. This makes it really easy to do parallax style animations.
Selectmenu
The <selectmenu>
element is an experiment to provide a more customizable select
element, with a stylable interface and options.
popup
The togglepopup
and popup
attributes let you create popups with all the right semantics without using JavaScript.
Spelling and grammar pseudo selectors
Use ::spelling-error
and ::grammar-error
to style text that the browser has flagged as containing spelling or grammar errors. Not all CSS properties are available for these styles.
Custom Highlight API
Use :highlight()
and the CSS.highlights
JS API to highlight arbitrary parts of a websites content.
CSS Scopes
The @scope
at-rule lets you scope styling between two selectors, making in so the CSS inside it is only applied to a part of the page and not the entire page.
jpegXL support
JPEGXL is a new version of JPEG that compresses as well as avif.
Suggestions?
Have suggestions for things you want enabled in Polypane? Let us know.
Have a question about Polypane?
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