We’re pleased to announce that basic support for the new slot-based shadow DOM API is now available in the nightly builds.

ECMAScript 6 in WebKit

In Safari 9 for OS X and iOS 9 you’ll be able to use some great ES6 features — there are even more you can try out if you run the nightly build.

Web Inspector Keyboard Shortcuts

To help you become more efficient, Web Inspector includes keyboard shortcuts for many commonly used actions.