Release Notes for Safari Technology Preview 210

Dec 18, 2024

by Jon Davis

Safari Technology Preview Release 210 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: 286708@main…287517@main.

CSS

New Features

  • Added support for the text-autospace property. (286750@main) (140008990)

Resolved Issues

  • Fixed updating the base background color where the root has color set explicitly when switching to light or dark modes. (286833@main) (139917332)
  • Fixed performance of querySelectorAll() with :has() descendant selectors. (286908@main) (140093151)
  • Fixed the unicode-bidi default for the <bdo> element. (287175@main) (140662417)

DOM

New Features

  • Added support for the ::details-content pseudo-element. (286891@main) (129786929)

JavaScript

Resolved Issues

  • Fixed: Updated Intl.DurationFormat to not include grouping for 2-digit or numeric styles. (287393@main) (140962232)
  • Fixed Intl.PluralRules pluralCategories to follow a specific order. (287411@main) (140965181)

Rendering

New Features

  • Implemented <details> and <summary> disclosure triangle as a list item. (286869@main) (95148788)

Resolved Issues

  • Fixed outside list-style-position quirk to only be applicable in quirks mode. (287114@main) (140602985)

Web Animations

New Features

  • Added preview support for Scroll-driven Animations. (287062@main) (140532929)

Web API

Resolved Issues

  • Fixed Navigation.navigate() to trigger the beforeunload event synchronously. (286919@main) (139628818)
  • Fixed innerText behavior for <details> and <summary>. (286799@main) (140172890)

Web Extensions

New Features

  • Added support for documentId in webNavigation. (287408@main) (137532909)

Web Inspector

New Features

  • Added support for sending Android user agents using the device override menu when Web Inspector is connected to a remote device. (287092@main) (139305520)

Resolved Issues

  • Fixed the overview icon to be inverted dark mode in the Graphics tab. (287110@main) (140602803)
  • Fixed recorded WebGL objects not getting highlighted correctly in the Graphics tab. (287127@main) (140625113)