Progressive enhancement for HTML

Get powerful new HTML attributes to build dynamic UI on the server. Works with any language. Gracefully degrades without JavaScript.

Links only update changed fragments

Unpoly enhances your links to update fragments instead of full pages. This preserves other page state, like scroll positions or forms.

Master complex forms

Branch off into layers

Branch off subinteractions into overlays. Return to the main page when you're done.

Outsmart server latency

Shorten response times by preloading pages, caching responses and following links earlier. Cached content is kept fresh and remains available when offline.

Client-side interaction feedback

Instantly show placeholders, disable forms or define arbitrary loading state. You can even do optimistic rendering with client-side templates.

Organize your JavaScript snippets

Organize your Javascripts in compilers to pair HTML elements with JavaScript behavior. Enhance existing HTML tags or create new elements.

Animation

Animate page changes with fade, swipe or zoom transitions.

Extensible

Hack and extend Unpoly using its comprehensive render lifecycle, JavaScript API and event model.

Plays nice with existing code

Migrate any server-side web application with manageable changes to existing JavaScripts.

Fix concurrency

Avoid real-world race conditions by smart aborting, batched validations and disabling submitted forms.

Made by Henning Koch

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