# Safari Technology Preview 243 Release Notes Learn about the latest web technology updates in Safari Technology Preview: Accessibility, Animations, CSS, Canvas, Editing, Encoding, Forms, HTML, JavaScript, Media, Networking, PDF, Rendering, SVG, Scrolling, Spatial Web, UI, Web API, Web Inspector, WebAssembly, WebGPU, and WebRTC. ## Overview [Safari Technology Preview](https://webkit.org/blog/6017/introducing-safari-technology-preview/) Release 243 is now [available for download](https://developer.apple.com/safari/resources/) 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: [310600@main…312007@main](https://github.com/WebKit/WebKit/compare/f037d92e0ac2bad469eee55c1bb0447e004f6970...f6d1b6eb589dcf909f1770238f5a682260990f73). ### Accessibility #### Resolved Issues - Fixed an issue where the `contextmenu` event was not fired for elements inside iframes when triggered by keyboard or assistive technology actions such as VoiceOver’s VO+Shift+M. ([310897@main](https://commits.webkit.org/310897@main)) (164128676) - Fixed an issue where color picker inputs could not be activated using VoiceOver’s press action. ([311168@main](https://commits.webkit.org/311168@main)) (172218114) - Fixed invalidation of aria-hidden=“true” when focus lands inside the aria-hidden subtree. ([311648@main](https://commits.webkit.org/311648@main)) (174449524) - Fixed VoiceOver support for base `` elements, including closing the popover on selection and correcting accessibility path positioning when CSS transforms are present. ([311587@main](https://commits.webkit.org/311587@main)) (175058883) ### Animations #### Resolved Issues - Fixed an issue where `!important` declarations did not override CSS animation values when CSS transitions were also running on the same property. ([310810@main](https://commits.webkit.org/310810@main)) (174367827) - Fixed an issue where identity matrix decomposition generated invalid quaternions, resulting in incorrect transform animations. ([311267@main](https://commits.webkit.org/311267@main)) (174813328) ### CSS #### New Features - Added support for `contain: style` applying to CSS quote counters, as specified in CSS Containment Level 2. ([311785@main](https://commits.webkit.org/311785@main)) (84758186) - Added support for the `insert` keyword for the `text-autospace` property. ([311503@main](https://commits.webkit.org/311503@main)) (175031507) #### Resolved Issues - Fixed flex layout to use the used `flex-basis` instead of the specified value for definiteness evaluation. ([311579@main](https://commits.webkit.org/311579@main)) (85707621) - Fixed an issue where element positioning was incorrect when the containing block was an anonymous block. ([311275@main](https://commits.webkit.org/311275@main)) (96548847) - Fixed an issue where `box-shadow` did not work on `display: table-row` elements. ([310609@main](https://commits.webkit.org/310609@main)) (96914376) - Fixed `text-indent` with `calc()` containing percentages to correctly treat percentage components as zero for intrinsic size contributions. ([310759@main](https://commits.webkit.org/310759@main)) (97025949) - Fixed an issue where out-of-flow content had an incorrect height when set to `fit-content`. ([311375@main](https://commits.webkit.org/311375@main)) (97492632) - Fixed an issue with percentage size resolution in flex items in quirks mode. ([311590@main](https://commits.webkit.org/311590@main)) (100183902) - Fixed an issue where `clip-path: inset()` border-radius values did not render correctly at certain element and clip-path sizes. ([310643@main](https://commits.webkit.org/310643@main)) (110847266) - Fixed `-webkit-box` flexbox emulation not sizing children correctly inside `

` elements. ([311784@main](https://commits.webkit.org/311784@main)) (114094538) - Fixed: Improved performance on pages using `:where` and `:is` selectors. ([311212@main](https://commits.webkit.org/311212@main)) (114904007) - Fixed an issue where elements with `display: table` could have incorrect layout when borders were present. ([311276@main](https://commits.webkit.org/311276@main)) (116110440) - Fixed an issue where elements with `border`, `position: absolute`, and `aspect-ratio: 1` were not rendered as squares. ([311310@main](https://commits.webkit.org/311310@main)) (126292577) - Fixed an issue where `perspective-origin` failed to resolve `var()` references when used as the second value, preventing animations from being applied. ([310650@main](https://commits.webkit.org/310650@main)) (131288246) - Fixed `:focus-visible` incorrectly matching after a programmatic `focus()` call triggered by clicking a button with child elements. ([311768@main](https://commits.webkit.org/311768@main)) (134337357) - Fixed an issue where the bottom margin of a last child element collapsed out of a parent with `min-height`. ([311274@main](https://commits.webkit.org/311274@main)) (134356544) - Fixed an issue where `:has(:empty)` continued to match after the targeted element’s content was dynamically changed to no longer be empty. ([310932@main](https://commits.webkit.org/310932@main)) (143864358) - Fixed an issue where floats and out-of-flow objects could be incorrectly adjacent to anonymous blocks. ([311226@main](https://commits.webkit.org/311226@main)) (144481961) - Fixed an issue where text gradually disappeared when toggling `text-transform` on elements with `::first-letter` styling. ([311201@main](https://commits.webkit.org/311201@main)) (145550507) - Fixed an issue where `height: max-content` resolved to zero on absolutely positioned elements when a child had `max-height: 100%`. ([311084@main](https://commits.webkit.org/311084@main)) (147333178) - Fixed an issue where an `inline-flex` container with `flex-direction: column` did not update its width to match the intrinsic size of a child image when the image was not cached. ([311141@main](https://commits.webkit.org/311141@main)) (150260401) - Fixed an issue where non-replaced elements with `aspect-ratio` enforced the automatic minimum size even when `min-width` was explicitly set to `0`. ([311096@main](https://commits.webkit.org/311096@main)) (156837730) - Fixed an issue where an element can’t anchor to its previous sibling. ([310970@main](https://commits.webkit.org/310970@main)) (162903640) - Fixed a regression where `@scope` styles did not apply to slotted elements in web components. ([311333@main](https://commits.webkit.org/311333@main)) (171383788) - Fixed an issue where dynamically inserting text before existing content did not update `::first-letter` styling. ([310719@main](https://commits.webkit.org/310719@main)) (171649994) - Fixed an issue where ordered list numbers with large starting values were clipped off-screen. ([311332@main](https://commits.webkit.org/311332@main)) (172515216) - Fixed a regression where the `ic` length unit was incorrectly affected by page scaling. ([311238@main](https://commits.webkit.org/311238@main)) (173198587) - Fixed `:placeholder-shown` to correctly match input elements that have an empty `placeholder` attribute. ([310781@main](https://commits.webkit.org/310781@main)) (173604635) - Fixed computed value of auto insets or margins as returned by `getComputedStyle()` to be zero, if the element uses `position-area` or `anchor-center`. ([311016@main](https://commits.webkit.org/311016@main)) (173885561) - Fixed `position-area` not being able to anchor to an element positioned using anchor functions. ([311601@main](https://commits.webkit.org/311601@main)) (173964030) - Fixed CSS variable cycle detection to match the CSS Values Level 5 specification. ([310610@main](https://commits.webkit.org/310610@main)) (174105259) - Fixed `url()` token serialization in CSS custom properties. ([310628@main](https://commits.webkit.org/310628@main)) (174144616) - Fixed `text-autospace` to correctly handle supplementary Unicode characters. ([310633@main](https://commits.webkit.org/310633@main)) (174148315) - Fixed an issue where flex items with different `order` values caused incorrect baseline alignment. ([310704@main](https://commits.webkit.org/310704@main)) (174241817) - Fixed an issue where hovering over `::first-letter` text showed a pointer cursor instead of the expected I-beam cursor. ([310730@main](https://commits.webkit.org/310730@main)) (174258447) - Fixed an issue where `display: grid` on a `

` element added extra unnecessary space below its content. ([311078@main](https://commits.webkit.org/311078@main)) (174301311) - Fixed outline radii rendering for elements with a non-auto `outline-style`. ([310784@main](https://commits.webkit.org/310784@main)) (174328839) - Fixed an issue where `aspect-ratio` was not honored when the page was zoomed in. ([310931@main](https://commits.webkit.org/310931@main)) (174361289) - Fixed replaced elements to use the transferred size through intrinsic aspect ratio for min-content and max-content sizing. ([310885@main](https://commits.webkit.org/310885@main)) (174386310) - Fixed an issue where `height: 100%` on a child element altered the layout when the parent’s height was defined via `aspect-ratio`. ([310877@main](https://commits.webkit.org/310877@main)) (174448267) - Fixed margin collapse to be allowed when the preferred block size behaves as auto, per the CSS Sizing specification. ([311011@main](https://commits.webkit.org/311011@main)) (174547610) - Fixed an issue where `document.styleSheets` and `shadowRoot.styleSheets` incorrectly included adopted style sheets, which per the CSSOM specification should only appear in the final CSS style sheets list used for style resolution. ([311074@main](https://commits.webkit.org/311074@main)) (174583340) - Fixed the CSSOM preferred style sheet set name to be established at sheet creation time based on insertion order rather than tree order. ([311077@main](https://commits.webkit.org/311077@main)) (174586058) - Fixed highlight pseudo-elements such as `::selection` and `::highlight` to disallow vendor-prefixed properties, aligning with the CSS Pseudo-Elements specification. ([311073@main](https://commits.webkit.org/311073@main)) (174590593) - Fixed cycle detection and nested function call handling in CSS custom functions. ([311178@main](https://commits.webkit.org/311178@main)) (174609179) - Fixed an issue where `word-break: break-all` incorrectly allowed CJK close punctuation to appear at the start of a line. ([311088@main](https://commits.webkit.org/311088@main)) (174656971) - Fixed an issue where `word-break: keep-all` incorrectly suppressed line break opportunities at CJK punctuation characters. ([311090@main](https://commits.webkit.org/311090@main)) (174658701) - Fixed the `FontFace` constructor to reject with a `SyntaxError` instead of a `NetworkError` when a `BufferSource` fails to parse, per the CSS Font Loading specification. ([311146@main](https://commits.webkit.org/311146@main)) (174669738) - Fixed the `FontFace` `family` attribute to return the serialization of the parsed value. ([311478@main](https://commits.webkit.org/311478@main)) (174698351) - Fixed grid layout to correctly handle percentage and `calc()` values for the specified size suggestion. ([311344@main](https://commits.webkit.org/311344@main)) (174863227) - Fixed `:has()` sibling invalidation issues related to relation forwarding. ([311583@main](https://commits.webkit.org/311583@main)) (175006235) - Fixed an issue where `min-width: auto` was not correctly computed for flex items. ([311578@main](https://commits.webkit.org/311578@main)) (175157619) - Fixed an issue where percentage heights inside flex items did not resolve correctly in quirks mode. ([311581@main](https://commits.webkit.org/311581@main)) (175158571) - Fixed an issue where `margin-trim: block-start` did not apply to blocks nested inside inline boxes. ([311584@main](https://commits.webkit.org/311584@main)) (175162899) - Fixed an issue where dynamically changing `display: contents` on a `

` legend caused incorrect rendering. ([311585@main](https://commits.webkit.org/311585@main)) (175163337) - Fixed: Improved `:has()` invalidation performance by including the full selector context in invalidation selectors. ([311642@main](https://commits.webkit.org/311642@main)) (175177078) - Fixed the CSS preload scanner to resolve relative `@import` URLs against the `` element URL. ([311744@main](https://commits.webkit.org/311744@main)) (175305190) - Fixed `-webkit-box` flex distribution for children with orthogonal writing modes. ([311787@main](https://commits.webkit.org/311787@main)) (175323734) - Fixed `calc(infinity)` as a `flex-grow` factor not stretching a flex item to 100% width. ([311956@main](https://commits.webkit.org/311956@main)) (175431146) - Fixed `:has()` sibling invalidation failing due to an internal bitfield overflow, causing stale styles when siblings are added or removed. ([311870@main](https://commits.webkit.org/311870@main)) (175433733) - Fixed `:has()` invalidation for sibling combinators when elements are inserted or removed from the DOM. ([311893@main](https://commits.webkit.org/311893@main)) (175441568) - Fixed `transition-property` not preserving the specified case of `` values during serialization. ([311909@main](https://commits.webkit.org/311909@main)) (175467206) - Fixed the `will-change` property not serializing correctly when used with non-property identifiers or identifiers in a non-standard case. ([311918@main](https://commits.webkit.org/311918@main)) (175482352) - Fixed percentage `top` and `bottom` values on relatively positioned elements not resolving when the containing block has `aspect-ratio`. ([311942@main](https://commits.webkit.org/311942@main)) (175502356) - Fixed: Updated the enhanced `

` element to use `self-*` keywords for anchor positioning. ([311944@main](https://commits.webkit.org/311944@main)) (175505107) - Fixed `text-indent` computation when tab stop positions are involved. ([311971@main](https://commits.webkit.org/311971@main)) (175529961) - Fixed `calc()` margin computations in flex layout. ([311977@main](https://commits.webkit.org/311977@main)) (175532405) - Fixed `calc()` margin computations for block, fieldset, and table caption layouts. ([311987@main](https://commits.webkit.org/311987@main)) (175548980) - Fixed handling of `

` `value` attributes in reversed ordered lists. ([311996@main](https://commits.webkit.org/311996@main)) (175558324) ### Canvas #### Resolved Issues - Fixed an issue where conic gradients applied to canvas arc strokes were not rendered correctly. ([310865@main](https://commits.webkit.org/310865@main)) (173536875) ### Editing #### Resolved Issues - Fixed an issue where characters styled with `::first-letter` were not selectable. ([311287@main](https://commits.webkit.org/311287@main)) (5688237) - Fixed font size 13pt being incorrectly mapped to `` (10pt) when using rich text editing. ([311700@main](https://commits.webkit.org/311700@main)) (15292320) - Fixed an issue where adjusting text selection with touch handles was prevented by JavaScript touch event handling on some websites. ([311216@main](https://commits.webkit.org/311216@main)) (151851274) - Fixed an issue where text selection was lost when focus transitioned from a `contentEditable` element to a non-editable target. ([310670@main](https://commits.webkit.org/310670@main)) (171221909) ### Encoding #### Resolved Issues - Fixed an issue where CJK encoding state was not reset appropriately during text decoding. ([311075@main](https://commits.webkit.org/311075@main)) (174649963) ### Forms #### Resolved Issues - Fixed an issue where `` control rendering was broken in vertical writing mode. ([310622@main](https://commits.webkit.org/310622@main)) (174068353) - Fixed a performance issue where parsing `` elements with thousands of `` children via `innerHTML` caused O(n²) overhead due to repeated list recalculation. ([310930@main](https://commits.webkit.org/310930@main)) (174244946) - Fixed an issue where date and time input types without `min` or `max` attributes incorrectly matched the `:in-range` pseudo-class. ([311279@main](https://commits.webkit.org/311279@main)) (174829899) - Fixed an issue where cloned `` and `` elements did not preserve their user-modified state. ([311346@main](https://commits.webkit.org/311346@main)) (174892989) - Fixed `<option>` elements to correctly implement the HTML specification’s dirtiness concept for tracking user-modified `selected` state. ([311746@main](https://commits.webkit.org/311746@main)) (175306111) - Fixed the default `display` value for `<optgroup>` and `<option>` elements to `block`, matching the behavior of other browsers. ([311911@main](https://commits.webkit.org/311911@main)) (175473184) ### HTML #### New Features - Added support for the `shadowrootslotassignment` attribute on declarative shadow roots. ([311295@main](https://commits.webkit.org/311295@main)) (173227340) #### Resolved Issues - Fixed parsing of `javascript:` URLs to align with the specification. ([311381@main](https://commits.webkit.org/311381@main)) (147612682) - Fixed the HTML preload scanner to skip preloading stylesheets that have the `disabled` attribute. ([311776@main](https://commits.webkit.org/311776@main)) (173378582) - Fixed document named item collection to include all `<object>` elements, aligning with other browser engines. ([310974@main](https://commits.webkit.org/310974@main)) (174537345) - Fixed `window.open()` to correctly consume user activation when creating a new browsing context, aligning with the HTML specification. ([311026@main](https://commits.webkit.org/311026@main)) (174587258) - Fixed remaining issues with `<img sizes="auto">` to fully align with the specification. ([311138@main](https://commits.webkit.org/311138@main)) (174684058) - Fixed an issue where `dir=auto` on `<slot>` elements did not update when slotted content changed. ([311325@main](https://commits.webkit.org/311325@main)) (174871706) - Fixed an issue where `<option>` elements rendered incorrectly when the `label` attribute was empty. ([311421@main](https://commits.webkit.org/311421@main)) (174979446) - Fixed an issue where the preload scanner incorrectly skipped `<source>` elements with an empty `type` attribute inside `<picture>`. ([311568@main](https://commits.webkit.org/311568@main)) (175094037) - Fixed `innerText` to emit a newline for empty `<option>` or `<optgroup>` inside `<select>`. ([311673@main](https://commits.webkit.org/311673@main)) (175245381) - Fixed HTML floating-point number parsing to correctly handle values with a leading `+` sign. ([311735@main](https://commits.webkit.org/311735@main)) (175300431) - Fixed keyboard focus getting stuck when tabbing through iframes that do not contain any focusable elements. ([311922@main](https://commits.webkit.org/311922@main)) (175375806) #### Deprecations - Deprecated the `href` attribute on all MathML elements except `<a>`. ([311550@main](https://commits.webkit.org/311550@main)) (173996661) ### JavaScript #### Resolved Issues - Fixed multiple top-level await correctness bugs with a rewrite of the ES module loader for standards compliance. ([311236@main](https://commits.webkit.org/311236@main)) (97370038) - Fixed regular expressions in Unicode mode to not count non-capturing groups and modifiers toward the number of available backreferences. ([311974@main](https://commits.webkit.org/311974@main)) (167746769) - Fixed an issue where regular expressions with non-BMP characters could skip valid match positions when alternating between patterns. ([310677@main](https://commits.webkit.org/310677@main)) (174200307) - Fixed an issue where regular expression captures were not properly cleared when backtracking out of fixed-count parenthesized groups and negative lookaheads. ([310679@main](https://commits.webkit.org/310679@main)) (174201284) - Fixed an issue where `import { "*" as x }` was incorrectly treated as a namespace import instead of a named import using the string `"*"` as a ModuleExportName. ([310776@main](https://commits.webkit.org/310776@main)) (174314099) - Fixed an issue where `RegExp.prototype.exec` and `RegExp.prototype.test` could match against a stale pattern if `lastIndex` has a `valueOf` that calls `RegExp.prototype.compile`. ([310887@main](https://commits.webkit.org/310887@main)) (174461752) - Fixed an issue where async functions using module-scoped variables could fail when the DFG JIT optimized scope resolution. ([311044@main](https://commits.webkit.org/311044@main)) (174626957) - Fixed an issue where `Intl.Segmenter` with `granularity: "word"` incorrectly reported `isWordLike: false` for numeric segments. ([311507@main](https://commits.webkit.org/311507@main)) (175057894) - Fixed `Object.defineProperties` to call Proxy traps in the correct order. ([311520@main](https://commits.webkit.org/311520@main)) (175068687) - Fixed an issue where `Intl.Locale` did not canonicalize before overriding the language. ([311538@main](https://commits.webkit.org/311538@main)) (175092327) - Fixed time zone identifiers to return primary IANA time zone IDs instead of legacy ICU identifiers. ([311604@main](https://commits.webkit.org/311604@main)) (175098682) - Fixed `Intl.DateTimeFormat` to preserve the original legacy timezone identifier instead of replacing it with the primary IANA ID. ([311724@main](https://commits.webkit.org/311724@main)) (175206605) - Fixed `Promise.prototype.finally` to throw a `TypeError` when `@@species` is not a constructor, matching the behavior of other browsers. ([311725@main](https://commits.webkit.org/311725@main)) (175290627) - Fixed the regular expression engine to reject dangling hyphens in character class syntax when using the `/v` flag. ([311999@main](https://commits.webkit.org/311999@main)) (175559808) ### Media #### New Features - Added support for setting `TextTrackCue.endTime` to `Infinity` to represent an unbounded cue duration. ([311730@main](https://commits.webkit.org/311730@main)) (71042767) #### Resolved Issues - Fixed an issue on iPad where exiting fullscreen on a media document incorrectly navigated back to the previous page instead of returning to the inline view. ([310718@main](https://commits.webkit.org/310718@main)) (137220651) - Fixed an issue where the darkening overlay on inline video controls made accurate scrubbing difficult and displayed video content incorrectly on macOS. ([311473@main](https://commits.webkit.org/311473@main)) (161271114) - Fixed `HTMLMediaElement.currentTime` to report smoothly progressing values instead of updating only at fixed intervals. ([311867@main](https://commits.webkit.org/311867@main)) (170115677) - Fixed Encrypted Media Extensions to check support for the full content type including codecs, rather than only the MIME type. ([310696@main](https://commits.webkit.org/310696@main)) (173852931) - Fixed an issue where the volume slider in video media controls could not be dragged. ([311328@main](https://commits.webkit.org/311328@main)) (174179871) - Fixed an issue where setting `HTMLMediaElement.volume` had no effect when the element was connected to an `AudioContext`. ([310958@main](https://commits.webkit.org/310958@main)) (174278899) - Fixed a regression where videos would stop playing and lose audio after a few seconds on some websites. ([311698@main](https://commits.webkit.org/311698@main)) (174966899) - Fixed an issue where U+0000 (NULL) characters were not allowed in `VTTCue` text content. ([311539@main](https://commits.webkit.org/311539@main)) (175084171) - Fixed video content disappearing after switching to another tab and back. ([311771@main](https://commits.webkit.org/311771@main)) (175257980) - Fixed WebVTT cue settings line parsing failures. ([311729@main](https://commits.webkit.org/311729@main)) (175296476) ### Networking #### Resolved Issues - Fixed redirects to `data:` URLs to be blocked for subresources such as images and scripts, aligning with the Fetch specification. ([311023@main](https://commits.webkit.org/311023@main)) (74165956) - Fixed an issue where the multipart form data parser incorrectly required CRLF after the closing delimiter, causing some web applications to fail to render correctly. ([311089@main](https://commits.webkit.org/311089@main)) (174348783) ### PDF #### Known Issues - Fixed PDF scrollbars to adapt to dark appearance. ([311985@main](https://commits.webkit.org/311985@main)) (174763396) ### Rendering #### Resolved Issues - Fixed an issue where `::first-letter` styles caused `Range.getClientRects()` and `Range.getBoundingClientRect()` to return incorrect dimensions. ([311085@main](https://commits.webkit.org/311085@main)) (71546397) - Fixed incorrect distributed height in table rows when a `<td>` element has an explicit height set. ([311001@main](https://commits.webkit.org/311001@main)) (78549188) - Fixed `position: relative` on table rows (`<tr>`) to correctly establish a containing block for absolutely positioned descendants. ([310995@main](https://commits.webkit.org/310995@main)) (94294819) - Fixed incorrect box sizing on inline elements when they have no siblings and their `padding-left` plus `margin-left` equals zero. ([311080@main](https://commits.webkit.org/311080@main)) (162376969) - Fixed an issue where space-taking scrollbars did not trigger a proper re-layout when the box size depends on content size. ([311766@main](https://commits.webkit.org/311766@main)) (166836126) - Fixed an issue where images with `min-width: fit-content` rendered at an incorrect width. ([310994@main](https://commits.webkit.org/310994@main)) (169359566) - Fixed an issue where overlay backgrounds would briefly dim incorrectly when de-compositing in a scrollable container. ([311198@main](https://commits.webkit.org/311198@main)) (171024685) - Fixed a regression where table content intermittently disappeared and reappeared. ([311411@main](https://commits.webkit.org/311411@main)) (171179878) - Fixed an issue with outside list markers when blockification prevents line-box parenting. ([311221@main](https://commits.webkit.org/311221@main)) (173417560) - Fixed an inverted Y-axis comparison that could cause incorrect caret positioning. ([310626@main](https://commits.webkit.org/310626@main)) (174144220) - Fixed an issue where `<br>` elements with `line-height: 0` still created extra vertical space, failing to respect the declared line height. ([310839@main](https://commits.webkit.org/310839@main)) (174400946) - Fixed auto outlines to more closely follow the border radii of elements. ([310900@main](https://commits.webkit.org/310900@main)) (174466854) - Fixed rendering of gradients in non-sRGB color spaces. ([311406@main](https://commits.webkit.org/311406@main)) (174880197) - Fixed `image-orientation` being ignored for `background-image`, `border-image`, and `list-style-image`. ([311390@main](https://commits.webkit.org/311390@main)) (174894122) - Fixed a `white-space: pre-wrap` layout issue with justified text. ([311385@main](https://commits.webkit.org/311385@main)) (174937310) - Fixed an issue where minimum height was not correctly computed for flex items. ([311443@main](https://commits.webkit.org/311443@main)) (174999995) - Fixed an issue with `flex-wrap` and flex factor computation for wrapping flex items. ([311456@main](https://commits.webkit.org/311456@main)) (175012395) - Fixed vertical `writing-mode` content incorrectly wrapping when the parent has `auto` height. ([311630@main](https://commits.webkit.org/311630@main)) (175123356) - Fixed minimum height calculation for flex items. ([311623@main](https://commits.webkit.org/311623@main)) (175195518) - Fixed incorrect bounding box position for newline characters. ([311668@main](https://commits.webkit.org/311668@main)) (175243361) ### SVG #### Resolved Issues - Fixed an issue where backslash-escaped dot characters in SVG animation timing attribute ID references were not parsed correctly. ([310805@main](https://commits.webkit.org/310805@main)) (94260935) - Fixed SVG2 systemLanguage attribute to improve parsing and compliance with the specification. ([311439@main](https://commits.webkit.org/311439@main)) (116427520) - Fixed the SMIL `values` attribute to preserve empty values and handle trailing semicolons. ([311502@main](https://commits.webkit.org/311502@main)) (173594455) - Fixed SVG2 `getStartPositionOfChar` and `getEndPositionOfChar` to be more compliant with the specification. ([311450@main](https://commits.webkit.org/311450@main)) (174145885) - Fixed SVG intrinsic aspect ratio being incorrectly suppressed when `preserveAspectRatio` is set to `none`. ([311723@main](https://commits.webkit.org/311723@main)) (175173375) - Fixed SVG images without complete intrinsic dimensions incorrectly using ratio-based scaling for `background-size`. ([311817@main](https://commits.webkit.org/311817@main)) (175345107) ### Scrolling #### Resolved Issues - Fixed an issue where tabbing in a scroll container with `scroll-padding` did not scroll the focused element into view. ([311512@main](https://commits.webkit.org/311512@main)) (147513379) - Fixed rubberbanding behaving incorrectly when a site triggers a smooth scroll to the top during a rubberband. ([311641@main](https://commits.webkit.org/311641@main)) (170705188) - Fixed an issue on iOS where composited layers would briefly flash blank when `window.scrollTo()` was called synchronously with a DOM layout change. ([310864@main](https://commits.webkit.org/310864@main)) (173197381) - Fixed an issue where calling `scrollIntoView()` on a scrollable element incorrectly scrolled the element’s own contents. ([310734@main](https://commits.webkit.org/310734@main)) (174173683) - Fixed scroll anchoring interfering with rubberbanding on some websites. ([311686@main](https://commits.webkit.org/311686@main)) (175195943) ### Spatial Web #### Resolved Issues - Fixed an issue on visionOS where fullscreen video would sometimes jump when exiting fullscreen if the browser window was narrower than the video. ([311116@main](https://commits.webkit.org/311116@main)) (174454557) ### UI #### Resolved Issues - Fixed: Tab key behaves incorrectly inside a PopupMenu (174468005) ### Web API #### Resolved Issues - Fixed Web IDL bindings to correctly reject `SharedArrayBuffer` where `[AllowShared]` is not specified. ([311536@main](https://commits.webkit.org/311536@main)) (107786134) - Fixed an issue on visionOS where the `gamepadconnected` event did not fire unless gamepad permission had already been granted. ([311465@main](https://commits.webkit.org/311465@main)) (141623162) - Fixed an issue where `CSPViolationReportBody` did not include the source line number in Content Security Policy violation reports. ([311040@main](https://commits.webkit.org/311040@main)) (152607402) - Fixed an issue where `history.replaceState()` on a traversed history entry incorrectly changed `navigation.currentEntry.key` to a new UUID instead of preserving the original key. ([310849@main](https://commits.webkit.org/310849@main)) (173388766) - Fixed the Credential Management API to properly define which credential types are allowed in the same `get()` request. ([311988@main](https://commits.webkit.org/311988@main)) (173918198) - Fixed an issue where `event.target` was not set after dispatching an event in a shadow tree with no listeners. ([310621@main](https://commits.webkit.org/310621@main)) (174136382) - Fixed an issue where `navigator.credentials.create()` and `navigator.credentials.get()` discarded the `AbortSignal` reason and always rejected with a generic `AbortError`. ([310782@main](https://commits.webkit.org/310782@main)) (174220589) - Fixed a missing `return` in the Navigation API’s `performTraversal` that caused incorrect behavior when traversing to an unknown key. ([311161@main](https://commits.webkit.org/311161@main)) (174513305) - Fixed `Range.extractContents()` to not extract out-of-bounds nodes when the end container is removed during extraction. ([310770@main](https://commits.webkit.org/310770@main)) (174307275) - Fixed `document.createEvent()` to throw an exception for `"MutationEvents"`, `"MutationEvent"`, `"PopStateEvent"`, and `"WheelEvent"`, aligning with other browser engines. ([310792@main](https://commits.webkit.org/310792@main)) (174339775) - Fixed `ParentNode.append()` to correctly de-duplicate nodes when the same node is passed multiple times. ([310807@main](https://commits.webkit.org/310807@main)) (174365465) - Fixed an issue where `MutationObserver` delivered `childList` records in the wrong order when script ran during node insertion. ([310812@main](https://commits.webkit.org/310812@main)) (174368989) - Fixed an issue where setting a `URL` object’s `port` property to whitespace behaved incorrectly. ([310919@main](https://commits.webkit.org/310919@main)) (174484035) - Fixed `Blob.slice()` to correctly clamp fractional `start` and `end` parameters using round-half-to-even rounding per the File API specification, which may change how edge-case fractional values like `0.5` are rounded. ([310992@main](https://commits.webkit.org/310992@main)) (174555334) - Fixed `postMessage()` to validate transferable object states after serialization, aligning with the HTML specification. ([310996@main](https://commits.webkit.org/310996@main)) (174558047) - Fixed `structuredClone()` and `window.postMessage()` to correctly throw a `DataCloneError` when serializing a `SharedArrayBuffer` outside of cross-origin isolated contexts. ([310998@main](https://commits.webkit.org/310998@main)) (174562553) - Fixed an issue where calling `Element.blur()` on an `<iframe>` did not reset `document.activeElement` to `<body>`. ([311452@main](https://commits.webkit.org/311452@main)) (174591529) - Fixed `document.styleSheets` to be accessible on documents created by `DOMParser`. ([311043@main](https://commits.webkit.org/311043@main)) (174625774) - Fixed `innerText` getter to correctly handle trailing newlines and blank lines for `<p>` elements and headings. ([311057@main](https://commits.webkit.org/311057@main)) (174642704) - Fixed `innerText` whitespace handling at inline-block boundaries. ([311163@main](https://commits.webkit.org/311163@main)) (174713114) - Fixed `XMLSerializer` namespace handling to correctly serialize elements with namespace prefixes. ([311184@main](https://commits.webkit.org/311184@main)) (174726401) - Fixed the `innerText` getter to preserve newlines for elements with `white-space: pre-line`. ([311185@main](https://commits.webkit.org/311185@main)) (174727341) - Fixed `innerText` handling of replaced elements at block boundaries. ([311269@main](https://commits.webkit.org/311269@main)) (174816319) - Fixed `EventSource` to be closed when `window.stop()` is called. ([311281@main](https://commits.webkit.org/311281@main)) (174830925) - Fixed `innerText` to not fall back to `textContent` for elements with `display: contents`. ([311339@main](https://commits.webkit.org/311339@main)) (174883499) - Fixed `innerText` to preserve the contents of `<option>` elements inside `<select>`. ([311449@main](https://commits.webkit.org/311449@main)) (175006854) - Fixed `Element.innerText` to collect option text when called directly on a `<select>` element. ([311576@main](https://commits.webkit.org/311576@main)) (175156630) - Fixed worker scripts to always be decoded as UTF-8, as per the specification. ([311761@main](https://commits.webkit.org/311761@main)) (175327455) - Fixed an issue where ancestors of `TreeWalker.currentNode` could be prematurely garbage collected. ([311873@main](https://commits.webkit.org/311873@main)) (175442228) ### Web Extensions #### New Features - Added reporting of uncaught JavaScript exceptions and unhandled promise rejections in Web Extension scripts. ([311150@main](https://commits.webkit.org/311150@main)) (174354070) #### Resolved Issues - Fixed `browser.i18n.getMessage()` to correctly substitute named placeholders when they appear adjacent to non-space characters. ([311685@main](https://commits.webkit.org/311685@main)) (169146196) - Fixed `browser.i18n.getMessage()` to correctly substitute two adjacent named placeholders. ([311769@main](https://commits.webkit.org/311769@main)) (175315700) ### Web Inspector #### New Features - Added Subgrid and Grid-Lanes badges to the Elements tab for easier identification of subgrid and grid-lanes layout contexts. ([310936@main](https://commits.webkit.org/310936@main)) (173681497) - Added the layout root element to Layout event details in the Timeline tab. ([311847@main](https://commits.webkit.org/311847@main)) (175419350) #### Resolved Issues - Fixed editing inline `style` attribute values in the Elements panel resulting in truncated or malformed content. ([311717@main](https://commits.webkit.org/311717@main)) (149523483) - Fixed the Network tab filtering by resource type not working after clearing a filter that had no matches. ([311947@main](https://commits.webkit.org/311947@main)) (161570940) - Fixed an issue where CSS rules added via the “Add New Rule” button in the Styles panel were intermittently not applied or would vanish after entering a property. ([310921@main](https://commits.webkit.org/310921@main)) (164971557) - Fixed an issue by removing a setting that incorrectly blocked the WebInspector service in the sandbox. ([310631@main](https://commits.webkit.org/310631@main)) (173330816) - Fixed an issue where the debugger selected the wrong thread when multiple WebAssembly virtual machines stopped simultaneously. ([310847@main](https://commits.webkit.org/310847@main)) (174187067) - Fixed the Layers 3D view to correctly map textures to composited bounds and use proper selection highlighting instead of tinting textures. ([310891@main](https://commits.webkit.org/310891@main)) (174355052) - Fixed the Layers 3D view to re-snapshot preserved layers after a repaint instead of displaying stale textures. ([310892@main](https://commits.webkit.org/310892@main)) (174358757) - Fixed an issue where Web Inspector showed empty source information for WebAssembly modules compiled via `WebAssembly.instantiateStreaming`. ([310852@main](https://commits.webkit.org/310852@main)) (174362152) - Fixed Web Inspector to display meaningful names for WebAssembly modules derived from the name section and source URL instead of address-based fallback names. ([310961@main](https://commits.webkit.org/310961@main)) (174465437) - Fixed an issue where all folder tree elements were expanded after filtering for a resource in the Sources panel. ([311459@main](https://commits.webkit.org/311459@main)) (175009135) - Fixed an erroneous “There are unread messages that have been filtered” banner appearing in the Console when `console.groupCollapsed()` is used. ([311764@main](https://commits.webkit.org/311764@main)) (175279759) - Fixed an issue in the Storage tab where filtering by storage type did not reveal the popup with options. ([311945@main](https://commits.webkit.org/311945@main)) (175444192) ### WebAssembly #### Resolved Issues - Fixed incorrect `IntegerOverflow` exceptions thrown by `i32.rem_s`, `i64.rem_s`, `i32.div_u`, `i64.div_u`, `i32.rem_u`, and `i64.rem_u` when both operands are constants. ([311898@main](https://commits.webkit.org/311898@main)) (175122462) ### WebGPU #### New Features - Added support for the `clip_distances` builtin value in WGSL shaders. ([311824@main](https://commits.webkit.org/311824@main)) (129202606) #### Resolved Issues - Fixed rendering failing when using direct `GPUTexture` objects instead of `GPUTextureView` with multisampled resolve targets in render passes. ([311938@main](https://commits.webkit.org/311938@main)) (175452924) ### WebRTC #### Resolved Issues - Fixed WebRTC VP9 encoders to correctly propagate frame colorspace information. ([311065@main](https://commits.webkit.org/311065@main)) (174008548) - Fixed a regression where `RTCPeerConnection` with `iceTransportPolicy: "relay"` failed to gather ICE candidates. ([311432@main](https://commits.webkit.org/311432@main)) (174794660) - Fixed `RTCInboundRtpStreamStats.trackIdentifier` to match `MediaStreamTrack.id`. ([311455@main](https://commits.webkit.org/311455@main)) (174938984) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)