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Safari Technology Preview 206 Release Notes

Learn about the latest web technology updates in Safari Technology Preview: CSS, Editing, JavaScript, Media, Rendering, SVG, Tables, Web Extensions,WebDriver, and WebRTC.

Overview

Safari Technology Preview Release 206 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: 284050@main…284743@main.

CSS

Resolved Issues

  • Fixed: Dropped layout containment from container-type. (284730@main) (132549134)

  • Fixed CSS nested declarations inside a @scope to behave like :where(:scope). (284635@main) (136856371)

Editing

New Features

  • Implemented ClipboardItem.support() which gives the page author the ability to understand which formats are supported during Clipboard operations. It also now returns a TypeError for a new ClipboardItem() with an empty Array. (284593@main) (136008522)

Resolved Issues

  • Fixed missing SecureContext in the ClipboardItem interface. (284511@main) (137197266)

JavaScript

New Features

Resolved Issues

  • Fixed Iterator.prototype.reduce() not properly forwarding the return() call to the underlying iterator. (284648@main) (137181340)

Media

New Features

Rendering

Resolved Issues

  • Fixed non-separable blend modes in mix-blend-mode to workon elements in compositing layers. (284170@main) (49387130)

  • Fixed repeating background-image sized to the content-box failing to fill the viewport in an iframe. (284165@main) (133952319)

  • Fixed floats not clearing in the WordPress Classic Editor sidebar layout. (284247@main) (136362683)

SVG

Resolved Issues

  • Fixed: Updated getTotalLength() with the web specification to throw an exception when non-renderable and the path is empty. (284311@main) (136719548)

Tables

Resolved Issues

  • Fixed Table Root to also account for fill-available in a fixed table layout. (284712@main) (137297914)

Web Extensions

New Features

  • Added support for getKeys() in storage areas. (284602@main) (136595295)

  • Added support for i18n.getSystemUILanguage and i18n.getPreferredSystemLanguages. (284637@main) (136929657)

WebDriver

Resolved Issues

  • Fixed a crash that could occur when simulating drag events with the right mouse button. (284577@main) (137068514)

WebRTC

New Features

  • Added support for enumerated visible network interfaces. (284687@main) (137067672)

Resolved Issues

  • Fixed MediaSession.setMicrophoneActive(true) prompting repeatedly if the microphone was muted by the user-agent once. (284399@main) (135941062)

  • Fixed setCameraActive to not unmute microphone if the user-agent previously muted both camera and microphone. (284069@main) (136221456)

  • Fixed AirPods unmuting to not unmute the camera if website muted the camera. (284514@main) (137065964)

See Also

2024