Apple has released Safari Technology Preview 217, the latest version of their developer preview web browser. The preview version of Apple’s popular browser offers developers and other interested users the ability to try out features that may or may not, debut in future public release versions of Safari.

‌Safari Technology Preview‌ 217 includes fixes and updates for CSS, Forms, JavaScript, Media, Rendering, SVG, Tables, Web API, Web Extensions, Web Inspector, and WebRTC.

The current ‌Safari Technology Preview‌ release is compatible with machines macOS Sonoma and macOS Sequoia, the newest version of macOS.

Overview

Safari Technology Preview Release 217 is now available for download for macOS Sequoia and macOS Sonoma. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update.

This release includes WebKit changes between: 292535@main…293326@main

CSS

Resolved Issues

Fixed @scope to create a style nested context. (292821@main) (148101373)

Fixed changing content-visibility from visible to hidden to repaint correctly. (292960@main) (148273903)

Fixed color to not be a high-priority property. (293082@main) (148361501)

Forms

Resolved Issues

Fixed setValidity of ElementInternals to handle missing optional anchor parameter. (292770@main) (123744294)

JavaScript

Resolved Issues

Fixed performance of Math.hypot() that was significantly slower than Math.sqrt(). (292549@main) (141821484)

Fixed Array#indexOf and Array#includes to treat +0 and -0 as the same value. (293134@main) (148472519)

Media

Resolved Issues

Fixed subtitle tracks with no srclang to be shown with the correct label. (292577@main) (147722563)

Rendering

Resolved Issues

Fixed the text indicator sometimes getting clipped during a bounce animation. (292612@main) (147602900)

Fixed geometry values inside content-visibility: hidden subtrees. (293267@main) (148553259)

Fixed not marking content-visibility: hidden content for layout when targeting content-visibility: auto. (293304@main) (148663896)

SVG

Resolved Issues

Fixed: Improved handling of SVG images with subresources. (293259@main) (148607855)

Tables

Resolved Issues

Fixed table layout to only be triggered when inline-size is not auto. (292536@main) (147636653)

Web API

New Features

Added support for scrollMargin in IntersectionObserver. (293306@main) (117527880)

Added support for the alg parameter when importing or exporting Edward’s-curve based JSON Web Keys in WebCrypto. (293089@main) (147323269)

Web Extensions

Resolved Issues

Fixed "excludeMatches" array in scripting.registerContentScripts() API getting ignored in Safari web extensions. (293106@main) (145489255) (FB16590857)

Web Inspector

New Features

Added support for exporting and importing data from worker targets in the Timelines tab. (292991@main) (145330533)

Added a a badge for <slot> to quickly jump to the assigned node in the Elements tab. (292966@main) (148297936)

Resolved Issues

Fixed a performance issue when blackboxing a large number of sourcemaps. (292997@main) (148116377)

WebRTC

New Features

Added support for exposing CSRC information for RTCEncodedVideoStream. (293088@main) (76548862)

Added serialisation of RTCEncodedAudioFrame and RTCEncodedVideoFrame. (293185@main) (148244334)

Added support for ImageCapture.grabFrame. (293243@main) (148425176)

Resolved Issues

Fixed enumerateDevices returning devices as available when permissions are denied. (292921@main) (147313922)

Fixed getUserMedia not using the correct camera or microphone if devices change while user is answering the permission prompt. (292696@main) (147762070)

Fixed enumerateDevices to not check for device permission. (293003@main) (148094614)

Fixed WebRTC encoded transform to transfer to the RTC encoded frame array buffer. (293232@main) (148343876)

Fixed RTC encoded frame timestamp should be persistent. (293238@main) (148580865)

While the preview is intended for use by developers and advanced users, to provide Apple with feedback on the development of the Safari browser, it can be run side-by-side with the release version of Safari. The app doesn’t require a developer account to download and install. For more information, visit the Safari Technology Preview website.

Topics macOS News Safari Technology Preview