What is a Web-facing API?

Any css property, DOM property, JS object, event, etc... that are accessible from JavaScript, plugins, and other means from the Web content is considered as Web-facing API.

Checklist for reviewing API implemented by major UAs

• Make sure new API does not conflict with the existing spec

Checklist for reviewing API NOT implemented by major UAs

• Make sure CSS property, attribute, element name, etc.. are prefixed with webkit