Safari Technology
Preview

Safari Technology Preview contains the most recent additions and improvements to WebKit and the latest advances in Safari web technologies. And once installed, you will receive notifications of updates from the Mac App Store.

Features

• Shared Links Extensibility. Use the new Shared Links API extension to add link suggestions to the shared links feed on Safari for OS X and iOS.
• Content Blocking API for Safari extensions. Easily block content from a large collection of webpage resources with minimal overhead and incredibly high performance.
• Force Touch Trackpad Mouse Events. Create interactivity like never before using new events and force information from the Force Touch Trackpad.
• CSS Scroll Snapping. Use CSS scroll snapping to keep the focal point of your content in view when scrolling momentum stops.
• FairPlay Streaming. Stream premium web video content securely with FairPlay Streaming support in Safari on OS X.
• AirPlay for HTML5 Video. If you use custom controls for your HTML5 media, use JavaScript AirPlay support to add your own control to stream video to Apple TV.
• HTML5 Video PiP. Use new JavaScript PiP support for iOS to add your own Picture in Picture control to custom controls for HTML5 videos.
• Backdrop Filters. Add advanced image filters to the backdrop of your elements to achieve modern iOS and OS X material effects in your web content layouts.

Note: Now requires macOS 10.13 or later; download for macOS 10.12.6 in Related Links.

CSS

• Fixed -webkit-clip-path offset for clipPath references
• Turned CSS Animation Triggers off by default
• Updated clip-path box mapping to unified box

Dark Mode

• Made the focus ring color honor the system accent color
• Prevented inverting text color for selections when not in dark mode

Web API

• Enabled Link Preload by default in the Experimental Features menu
• Fixed cookie creation time exposed to Objective-C
• Fixed find in page to find low (German) quotes
• Fixed return values for DOMMatrix.invertSelf() when used on a non-invertible matrix
• Implemented support for Element.toggleAttribute
• Improved window.event compliance: Should not be set when target is in shadow tree
• Promoted the Secure Context API from an experimental feature to always on
• Updated the Element API to use qualifiedName to comply with standards

Service Workers

• Made fetch() use "same-origin" credentials by default
• Fixed fetching several times in a row

Media

• Disabled autoplay when the element is suspended
• Fixed video flicker which sometimes happened when playing to AppleTV
• Changed to reject getUserMedia promise if capture fails

WebRTC

• Fixed delay and video lag caused by enabling and disabling a MediStreamTrack

Web Assembly

• Stopped using tracePoints in JavaScript/WASM entry

Web Inspector

• Fixed copy from Search results content view
• Fixed the "Open Link" context menu action
• Fixed the resource search field in dark mode
• Fixed the Debugger content view to properly update when the left sidebar is collapsed
• Enabled control-dragging to pan the 3D render in the Layers inspector

Accessibility

• Added a subrole for meter elements on macOS
• Fixed setValue on text controls to send out key events