Complex CSS Selectors Inside Selectors
WebKit supports many selectors defined in the draft of CSS Selectors Level 4 — like matches(), not(), nth-child(…of…) and nth-last-child(…of…).
Introducing Backdrop Filters
The proposed backdrop-filter property adds a feature that designers have been demanding for some time — allowing for beautiful blur effects.
Web Inspector User Interface Changes
Web Inspector’s core functions have been divided out into their own tabs — like the tabs in Safari.
Using the System Font in Web Content
On iOS 9 and OS X El Capitan, specifying “font-family: -apple-system” allows you to use Apple’s new system font: San Francisco.
Announcing JetStream 1.1
JetStream 1.1 fixes bugs in two existing tests and adds a new test to replace the oldest and smallest test in the latency component.
Web Inspector Console Improvements
We improved both the Console and Object views to make it more powerful and fun to use.
Introduction to WebKit Content Blockers
Describing content blocking rules in a structured format ahead-of-time, rather than running extension-provided code.
Building WebKit for iOS Simulator
You can now build and run top-of-tree WebKit for iOS in the iOS Simulator — included are a summary of steps to get you up and running.
Using ARIA 1.0 and the WebKit Accessibility Node Inspector
Most major web apps use ARIA and related techniques to improve accessibility and general usability for everyone.
Introducing the JetStream Benchmark Suite