---
title: Safari Technology Preview 198 Release Notes
framework: safari-technology-preview-release-notes
role: article
role_heading: Article
path: safari-technology-preview-release-notes/stp-release-198
---

# Safari Technology Preview 198 Release Notes

Learn about the latest web technology updates in Safari Technology Preview: CSS, Forms, JavaScript, Media, Rendering, Safari Extensions, SVG, Web API, Web Inspector, and WebRTC.

## Overview

Overview Safari Technology Preview Release 198 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: 279855@main…280286@main. CSS New Features Added support for the :active-view-transition pseudo-class. (280027@main)  (129851076) Forms Resolved Issues Fixed input elements to use the [value] as the first fallback step base. (280127@main)  (107721910) JavaScript Resolved Issues Fixed V128 values to be throwable to match the specification. (279989@main)  (106030051) Media Resolved Issues Fixed missing picture-in-picture when leaving Safari with picture-in-picture enabled from video viewer. (279877@main)  (124376686) Fixed the context menu to show “Exit Viewer” when using video viewer. (280128@main)  (126300924) Rendering Resolved Issues Fixed scrolling in a flexbox container. (279992@main)  (129343181) Safari Extensions Resolved Issues Fixed throwing an exception when calling browser.storage.set with undefined as a map value. (280265@main)  (130282050) SVG Deprecations Removed non-standard getTransformToElement from SVGGraphicsElement (280208@main)  (122435702) Web API Resolved Issues Fixed an issue when inserting writing suggestions into an editable display: grid container. (279986@main)  (129366300) Web Inspector Resolved Issues Fixed disappearing objects and disclosure triangles when Web Inspector is at narrow widths. (279894@main)  (121861970) Fixed the list of breakpoints in the Sources tab disappearing when Web Inspector is reloaded. (279884@main)  (123641994) WebRTC Resolved Issues Fixed RTCEncodedVideoFrame and RTCEncodedAudioFrame to match the WebIDL specification. (280198@main)  (118607685)

## See Also

### 2024

- [Safari Technology Preview 210 Release Notes](safari-technology-preview-release-notes/stp-release-210.md)
- [Safari Technology Preview 209 Release Notes](safari-technology-preview-release-notes/stp-release-209.md)
- [Safari Technology Preview 208 Release Notes](safari-technology-preview-release-notes/stp-release-208.md)
- [Safari Technology Preview 207 Release Notes](safari-technology-preview-release-notes/stp-release-207.md)
- [Safari Technology Preview 206 Release Notes](safari-technology-preview-release-notes/stp-release-206.md)
- [Safari Technology Preview 205 Release Notes](safari-technology-preview-release-notes/stp-release-205.md)
- [Safari Technology Preview 204 Release Notes](safari-technology-preview-release-notes/stp-release-204.md)
- [Safari Technology Preview 203 Release Notes](safari-technology-preview-release-notes/stp-release-203.md)
- [Safari Technology Preview 202 Release Notes](safari-technology-preview-release-notes/stp-release-202.md)
- [Safari Technology Preview 201 Release Notes](safari-technology-preview-release-notes/stp-release-201.md)
- [Safari Technology Preview 200 Release Notes](safari-technology-preview-release-notes/stp-release-200.md)
- [Safari Technology Preview 199 Release Notes](safari-technology-preview-release-notes/stp-release-199.md)
- [Safari Technology Preview 197 Release Notes](safari-technology-preview-release-notes/stp-release-197.md)
- [Safari Technology Preview 196 Release Notes](safari-technology-preview-release-notes/stp-release-196.md)
- [Safari Technology Preview 195 Release Notes](safari-technology-preview-release-notes/stp-release-195.md)