Apple has released Safari Technology Preview 200, 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 200 includes fixes and updates for CSS, JavaScript, Rendering, and Web Extensions.
The current Safari Technology Preview release is compatible with machines macOS Sonoma and the macOS Sequoia beta, the newest version of macOS that Apple is beta testing.
Overview
Safari Technology Preview Release 200 is now available for download for macOS Sequoia beta 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: 280675@main…281143@main.
CSS
Resolved Issues
- Fixed: Optimized Masonry Grids for items with a span of 1. (280919@main) (131407028)
JavaScript
New Features
- Implemented
Uint8Arrayin SIMD. (280719@main) (131249821).prototype .to Hex Resolved Issues
- Fixed class field initializers to disallow
yieldandawaitexpressions. (280837@main) (119044881)- Fixed DestructuringAssignmentTarget to be evaluated prior to calling
[[Get]]or a stepping iterator. (281013@main) (121960976)- Fixed throwing an exception for negative exponent in BigInt in the JIT compiler. (280841@main) (131051084)
- Fixed RegExp range quantifier to allow 2^53 – 1. (280953@main) (131710011)
Rendering
Resolved Issues
- Fixed garbled bold text caused by glyph lookup using the wrong font’s glyph IDs when multiple installed fonts have the same name. (281022@main) (129891005) (FB13909556)
- Fixed scrolling of content overflowing a flex item in an end-aligned flex container. (279992@main) (131201271)
Web Extensions
Resolved Issues
- Fixed Service Workers not appearing in the Develop menu or remote Web Inspector menu. (280912@main) (130712941)
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.