[OS X] Safari Technology Preview

[Arthur]

This is essentially Apple's version of Chrome Canary since the Tech Preview can run alongside Safari and provides the latest browser features.

 

Download (requires OS X 10.11.4 or later) / Release Notes

 

https://webkit.org/blog/6017/introducing-safari-technology-preview

 

Introducing Safari Technology Preview

Starting today, there’s a new, convenient way to see what features and improvements are coming to Safari and other applications that use WebKit. Safari Technology Preview is a version of Safari for OS X, distributed by Apple, that includes a cutting-edge, in-development version of the WebKit browser engine. It’s a great way to test upcoming WebKit features and give feedback to the people building them when it’s most useful — early in development.

 

Safari Technology Preview is a standalone application that can be used side-by-side with Safari or other web browsers, making it easy to compare behaviors between them. Besides having the latest web features and bug fixes from WebKit, Safari Technology Preview includes the latest improvements to Web Inspector, which you can use to develop and debug your websites. Updates for Safari Technology Preview will be available every two weeks through the Updates pane of the Mac App Store.

 

Features You Can Try Today

Here are just a few areas of recent developments in WebKit that you can try in Safari Technology Preview today.

 

ECMAScript 6

Safari Technology Preview supports ECMAScript 6, the latest iteration of the JavaScript programming language. ES6 has many new features, including classes; lexical scoping using let, const, and class; iterators and generators; arrow functions; default parameters values; and many new built-in APIs.

 

B3 JavaScript JIT compiler

B3 is a new low-latency, high-throughput compiler designed from the ground up to support JavaScript and other dynamic languages. B3 delivers great performance benefits, especially on systems with fewer CPU cores.

 

Improved IndexedDB implementation

WebKit’s revamped IndexedDB implementation is more stable, more standards compliant, and still undergoing rapid improvement.

 

Shadow DOM

The latest version of Shadow DOM has been heavily revised based on input from web content authors and browser developers. WebKit is the first browser engine to implement this new version of the Shadow DOM spec.

 

Programmatic cut and copy to the clipboard

It’s now possible to programmatically copy and cut text in response to a user gesture with document.execCommand('copy') and document.execCommand('cut'). Having this ability may eliminate some websites’ last need for the Flash plug-in.

 

Content Security Policy Level 2

You can define a policy for your web application to mitigate content injection vulnerabilities, such as cross-site scripting (XSS). Level 2 expands on Level 1 with support for

Edited March 31, 2016 by Arthur