Contents

Safari Technology Preview 194 Release Notes

Learn about the latest web technology updates in Safari Technology Preview: Accessibility, Canvas, CSS, JavaScript, Networking, Rendering, SVG, Web Animations, Web API, Web Extensions, and WebGL.

Overview

Safari Technology Preview Release 194 is now available for download for macOS Sonoma and macOS Ventura. 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: 277150@main…278096@main.

Accessibility

Resolved Issues

  • Fixed range input not firing an input event when incremented or decremented via accessibility APIs. (277182@main) (85707481)

  • Fixed setting aria-hidden on a slot not hiding the slot’s assigned nodes. (277359@main) (108762653)

  • Fixed aria-hidden=true to be ignored on the <body> and <html> elements. (277677@main) (123049663)

Canvas

New Features

  • Added support for CanvasRenderingContext2D.filter. (278000@main) (51303686)

  • Added support for willReadFrequently. (277792@main) (126739379)

Resolved Issues

  • Fixed OffscreenCanvas failing to render to the placeholder with nested workers. (277328@main) (126069375)

  • Fixed losing the contents layer of the placeholder canvas of OffscreenCanvas when switching off the tab. (277654@main) (126070648)

Deprecations

  • Removed support for OffscreenCanvasRenderingContext2D’s commit() method. (278047@main) (126758254)

CSS

Resolved Issues

  • Fixed an incorrect difference between implicit and explicit initial values for custom properties. (277670@main) (124573975)

  • Fixed excluding -apple-pay-button from applying to any element that supports appearance: auto and is not a button. (277268@main) (126107516)

  • Fixed missing color interpretation methods added to CSS color specifications. (277481@main) (126444371)

JavaScript

New Features

  • Added support for the v flag with RegExp.prototype[Symbol.matchAll]. (277160@main) (126017731)

  • Added support for Unicode 15.1.0 characters in RegExp. (277786@main) (126863692)

Resolved Issues

  • Fixed RegExp.prototype.@@split to update the following legacy RegExp static properties: RegExp.input, RegExp.lastMatch, RegExp.lastParen, RegExp.leftContext, RegExp.rightContext, and RegExp.$1, ... RegExp.$9. (277559@main) (99865597)

  • Fixed logical assignment expressions to throw a syntax error when the left side of the assignment is a function call. (277536@main) (126540636)

  • Fixed throwing a syntax error for nested duplicate-named capturing groups in RegEx. (277928@main) (126863735)

  • Fixed Intl implementation to ensure canonicalizing “GMT” to “UTC” based on a spec update. (277997@main) (127061600)

Networking

Resolved Issues

  • Fixed incorrect Sec-Fetch-Site value for navigation of a nested document. (277662@main) (109358563)

Rendering

Resolved Issues

  • Fixed incorrect View Transition snapshot position when page is scrolled. (277371@main) (123668892)

  • Fixed Masonry to correctly perform intrinsic sizing. (277403@main) (124240255)

  • Fixed visual overflow causing shifts in View Transitions. (277183@main) (125882228)

  • Fixed snapshot scaling when animating View Transitions. (277636@main) (125931538)

  • Fixed capturing the root background showing a white area at bottom in View Transitions. (272224@main) (125931851)

  • Fixed incorrect grid item positioning with out-of-flow sibling. (277300@main) (126207467)

  • Fixed visual overflow rect to be recomputed at every frame of View Transitions. (277482@main) (126240398)

  • Fixed break-word with a float discarding text. (277461@main) (126309547)

  • Fixed rendering 3D transforms in View Transitions. (277639@main) (126513916)

  • Fixed image capture rectangle not including positioned descendants. (277714@main) (126660740)

SVG

New Features

  • Added animation support for the d property in SVG. (277299@main) (126206354)

Resolved Issues

  • Fixed clipping an SVG when an SVGFilter is applied to its root. (265135@main) (118938065)

Web Animations

Resolved Issues

  • Fixed updating an animation when changing the value of a transform property while that property is animated with an implicit keyframe. (277257@main) (126126617)

  • Fixed animating with color-mix. (277256@main) (126148201)

Web API

New Features

  • Added support for serializing shadow roots through getHTML() as well as the corresponding shadow root serializable feature. (277374@main) (125513986)

Resolved Issues

  • Fixed throwing exceptions in navigation methods if in a detached state. (277487@main) (123898636)

  • Fixed a minor issue in URL’s host setter. (277531@main) (124363495)

  • Fixed GeolocationCoordinates to expose a toJSON() method. (277347@main) (126183686)

  • Fixed GeolocationPosition to expose a toJSON() method. (277413@main) (126247408)

  • Fixed setting CustomEvent.target when dispatching an event. (277435@main) (126311287)

Web Extensions

Resolved Issues

  • Fixed permissionState to be requested if an extension has the webNavigation permission. (277308@main) (126212951)

WebGL

New Features

  • Enabled support for the following approved extensions: EXT_render_snorm, OES_sample_variables, and OES_shader_multisample_interpolation. (277775@main) (126863775)

See Also

2024