Browser Support

Supported browsers

askable-ui targets modern evergreen browsers:

Browser	Minimum version
Chrome / Chromium	80+
Firefox	78+
Safari / WebKit	14+
Edge (Chromium)	80+

Mobile browsers (Chrome for Android, Safari iOS) follow the same policy. IE11 and legacy Edge (EdgeHTML) are not supported.

Browser API dependencies

askable-ui relies on the following browser APIs:

API	Used for	Fallback
MutationObserver	Detecting dynamically added/removed [data-askable] elements	No-op — observe() does nothing if unavailable
addEventListener	Click, hover, and focus event listeners	No-op
Element.closest()	Nested element resolution	Not polyfilled
Element.contains()	Containment checks for nested strategy	Not polyfilled

If window, document, or MutationObserver are not present (SSR, Node.js, old browsers), observe() exits immediately without attaching any listeners. Context creation, serialization, and select() are always safe.

Node.js / SSR

All packages are safe to import and render in Node.js. See SSR Safety for the full server/client boundary documentation.

Polyfills

askable-ui does not ship or require polyfills. If you need to support older browsers:

• MutationObserver — widely supported since 2013; no polyfill needed for any realistic target
• Element.closest() — available everywhere; if you target very old Safari, add the standard MDN polyfill

Testing targets

CI runs tests in Node.js + jsdom (unit). Browser-level integration tests (Playwright) are tracked in #16.