Data showing what JavaScript operations are usable in what browser

Question

I am looking for compatibility data about browsers:

• Does browser Firefox 32 support createDocumentFragment()?
• Does browser Internet Explorer 5.5 support querySelectorAll()?
• etc

Data should be easily downloadable under an open license, unlike quirksmode.
(for instance for use in an open source IDE or quality insurance tool)

Answer 1

The caniuse.com project includes compatabilities for many browsers versus CSS, HTML, JS API, SVG, and Other categories.

"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

License is CC BY-NC 3.0.

Raw data is on GitHub.