Safari Technology Preview 54 Release Notes

Preview the latest web technology updates including: Clipboard API, Beacon API, Web API, WebRTC, and Web Inspector.

Overview

Safari Technology Preview Release 54 is now available for download for macOS Sierra and macOS High Sierra. If you already have Safari Technology Preview installed, you can update from the Mac App Store’s Updates tab. This release covers WebKit revisions 230029-230521.

Clipboard API

Fixed copying a list from Microsoft Word to TinyMCE when mso-list is the first property (r230120)
Prioritized file promises over filenames during drag and drop (r230221)

Beacon API

Fixed Beacon redirect responses to be CORS validated (r230495)

Web API

Implemented createImageBitmap(Blob) (r230350)

WebRTC

Added a special software encoder mode when a compression session is not using a hardware encoder and VCP is not active (r230451)
Added experimental support for MDNS ICE candidates in WebRTC data channel peer-to-peer connections (r230290, r230307)

Web Inspector

Fixed the errors glyph to fully change to blue when active (r230372)
Tinted all pixels drawn by a shader program when hovering over a tree element in the Canvas Tab (r230127)