ES6 Feature Complete
As of r202125, JavaScriptCore supports all of the new features in the ECMAScript 6 (ES6) language specification.
Release Notes for Safari Technology Preview 8
Safari Technology Preview Release 8 is now available for download for both macOS Sierra beta 2 and OS X El Capitan.
Improving Color on the Web
The past few years have seen a dramatic improvement in display technology.
Release Notes for Safari Technology Preview 7
Safari Technology Preview Release 7 is now available for download.
Introducing JSC’s New Sampling Profiler
JavaScriptCore has a new sampling profiler that powers Web Inspector’s JavaScript & Events timeline.
Next Steps for Legacy Plug-ins
On websites that offer both Flash and HTML5 implementations of content, Safari users will now always experience the modern HTML5 implementation, delivering improved performance and battery life.
Release Notes for Safari Technology Preview 6
Safari Technology Preview Release 6 is now available for download.
Memory Debugging with Web Inspector
Web Inspector now includes two new timelines for debugging a webpage’s memory usage.
A Crash Site Investigation Story
JavaScriptCore CSI:
A Crash Site Investigation Story
When debugging JavaScript bugs, web developers have Web Inspector which provides a debugger and many introspective tools to examine their code with.
Release Notes for Safari Technology Preview 5
Safari Technology Preview Release 5 is now available for download.
ECMAScript 6 Proper Tail Calls in WebKit
Proper Tail Calls (PTC) is a new feature in the ECMAScript 6 language.