Safari Technology Preview Release 236 is now available for download for macOS Tahoe and macOS Sequoia. 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: 305084@main…305413@main.

CSS

Resolved Issues

• Fixed handling of padding and margins for flex and grid layouts across all writing modes. (301814@main) (71046552)
• Fixed text-combine-upright to properly ignore letter-spacing when composing text horizontally, aligning with the CSS Writing Modes specification. (305116@main) (116562622)
• Fixed an issue where background-blend-mode was not applied correctly when combined with background-clip: text. (305118@main) (120901898)
• Fixed an issue where CSS @starting-style entry animations were only applied on the first transition, especially when interacting with anchor positioning or position fallbacks. (305371@main) (163928932)
• Fixed table column width distribution when a colspan spans mixed percentage and auto-width columns to properly respect percentage constraints. (305120@main) (165561401)
• Fixed an issue where shape-outside did not update correctly after web fonts loaded. (305299@main) (166336491)
• Fixed table height calculation to correctly account for captions with orthogonal writing-mode. (305110@main) (167220730)
• Fixed an issue where grid-lanes items incorrectly used a grid area as their containing block in the stacking axis, ensuring proper sizing for cases like fit-content and percentage-based dimensions. (305319@main) (167221488)
• Fixed counter-* properties serialization order. (305086@main) (167518994)
• Fixed outline-width and outline-offset to follow updated computed style resolution rules. (305153@main) (167618367)
• Fixed the computed style resolution for border-*-width properties. (305212@main) (167689519)
• Fixed the computed style resolution for the column-rule-width property. (305240@main) (167725940)
• Fixed border-*-width, outline-width, and column-rule-width so they now pixel snap correctly during CSS animations and transitions. (305272@main) (167763497)

Forms

Resolved Issues

• Fixed an issue where input[type="search"] fields with appearance: none incorrectly reserved space for the datalist dropdown button. (305314@main) (166754216)
• Fixed an incorrect fallback for the menu style for empty lists, improving readability and correctness. (305228@main) (167662316)

HTML

New Features

• Added support for using the min(), max(), and clamp() math functions in the sizes attribute of <img> elements. (305226@main) (167526292)

Resolved Issues

• Fixed an issue where nested about:blank frames were incorrectly treated as self-referencing, preventing them from loading. (305404@main) (148373033)

Images

Resolved Issues

• Fixed image uploading to not transcode images when accept="image/*" is specified. (305283@main) (166124206)

Media

Resolved Issues

• Fixed an issue where <video> poster images were incorrectly double-scaled when zoom was applied by using the cached intrinsic poster size without reapplying zoom. (305347@main) (150976146)
• Fixed an issue where the macOS inline media controls timeline scrubber overlapped the right container buttons. (305177@main) (167634241)

Rendering

Resolved Issues

• Fixed an issue where auto-positioned absolutely positioned descendants were not always marked for layout when their parent’s border box moved. (305229@main) (131806062)
• Fixed an issue where color fonts could affect the color of other DOM elements. (305254@main) (166631312)
• Fixed an issue by disabling CoreGraphics blur and drop-shadow filters due to system framework bugs and reverting the previous workaround. (305216@main) (166631624)
• Fixed <col> elements with span > 1 not applying their width to all spanned columns during table layout, aligning behavior with other browsers. (305113@main) (167225435)
• Fixed table layout min-width distribution for spanning cells with mixed percent, fixed, and auto columns. (305215@main) (167684748)

SVG

Resolved Issues

• Fixed breaking SVG resource referencing when removing a resource which shares its id with other resources. (305197@main) (147015037)
• Fixed <clipPath> to clip to its <use> child element based on the visibility of the <use> target element. (305374@main) (167491519)
• Fixed displaying an SVG filter referencing an element with a huge stroke. (305136@main) (167516452)
• Fixed hit testing for overlapping <text> and <tspan> elements in SVG. (305221@main) (167691166)

Web API

Resolved Issues

• Fixed DeviceMotionEvent and DeviceOrientationEvent interfaces so that they only show up in secure contexts just like the corresponding events and made ondevicemotion and ondeviceorientation enumerable, aligning with the specification. (305266@main) (44804273)
• Fixed handling of unknown DigitalCredential protocols by gracefully filtering them out and showing a console warning instead of throwing an error. (305257@main) (166673454)

WebRTC

Resolved Issues

• Fixed RTCConfiguration.iceServers to be a non-optional sequence with an empty array as the default, improving spec compliance and ensuring RTCPeerConnection behaves correctly when iceServers is undefined. (305152@main) (167607478)