Apple has released Safari Technology Preview 186, the latest version of their developer preview web browser. The preview version of Apple’s popular browser offers developers and other interested users the ability to try out features that may or may not, debut in future public release versions of Safari.
Safari Technology Preview 186 includes fixes and updates for CSS, Forms, HTML, JavaScript, Rendering, Service Workers, Web Animations, and Web API.
The current Safari Technology Preview release is compatible with machines running macOS Ventura and macOS Sonoma.
Overview
Safari Technology Preview Release 186 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: 271832@main…272448@main.
CSS
New Features
- Added support for invalidating
:
,any-link :
, andlink :-webkit-any-link
inside:
(271919@main) (116616425)has() - Added support for
@scope
invalidation. (271897@main) (119313058)- Added support for an implicit scoping root when there is no
<scope-start>
. (272390@main) (119659940)- Added support for
:
insidescope @scope
prelude. (272065@main) (119661541)- Added support for
align-content
on table cells. (272373@main) (119701629)- Added support for
content-visibility
to be animate-able. (272364@main) (119940258)Resolved Issues
- Fixed
query
to not throw an exception forSelector() -webkit-
prefixed pseudo-elements. (272337@main) (99299129)- Fixed
:
triggering while typing a date. (272346@main) (110687369)user-invalid - Fixed nested
@supports
queries with declarations. (271989@main) (113652033)- Fixed
contain: inline-size
breakinggrid-template-rows: auto
. (272085@main) (113915953)- Fixed parsing and serialization of
-webkit-
prefixed pseudo-elements. (272411@main) (118081134)- Fixed incorrect scoping roots with nested
@scope
. (271941@main) (119511916)- Fixed
@scope
prelude to take nesting into account. (272117@main) (119711922)- Fixed grid with size containment and
min-height
not sizing row correctly. (272276@main) (119736473)- Fixed
@scope
to be able to have orphaned declarations with an implicit enclosing style rule. (119937025)Forms
New Features
- Added focus ring support for
<input type="checkbox" switch>
. (271884@main) (119499785)- Added vertical rendering support for
<input type="checkbox" switch>
. (272405@main) (119940157)HTML
Resolved Issues
- Fixed missing support for the
direction
attribute in the list of attributes whose values are matched case-insensitively with attribute selectors. (272219@main) (119432066)JavaScript
Resolved Issues
- Fixed async functions and generators to properly handle promises with throwing “constructor” getter. (272291@main) (119734587)
Rendering
Resolved Issues
- Fixed rendering for a
<div>
within a transformed parent<div>
withoverflow: hidden
. (271894@main) (118901069)- Fixed
offset
andHeight offset
are 0 for an inline box wrapping a block. (272386@main) (119955792)Width Service Workers
Resolved Issues
- Fixed duplicate load requests with an active service worker. (272024@main) (104377727)
Web Animations
Resolved Issues
- Fixed percentage transform animations when
width
andheight
are animated. (272022@main) (63309680)- Fixed a paused animation where
current
is changed to 0 not restarting when unpaused. (271872@main) (118826588)Time Web API
New Features
- Added a “gamepad” permission policy defaulting to
*
for the allow list. (272199@main) (83219098)- Added ShadowRoot
clonable
attribute. (272096@main) (119707278)Resolved Issues
- Fixed invalid coordinates on
wheel
andgesturechange
events inside an iframe. (272176@main) (105243167) (FB11986074)- Fixed HTMLAreaElement to align with the HTML Standard. (272217@main) (110028213)
- Fixed Scroll To Text Fragment to not scroll after dynamic stylesheet loads and the user has scrolled. (272151@main) (112608578)
- Fixed toggling the
spellcheck
attribute not toggling spelling markers on input elements. (271927@main) (119269616)
While the preview is intended for use by developers and advanced users, to provide Apple with feedback on the development of the Safari browser, it can be run side-by-side with the release version of Safari. The app doesn’t require a developer account to download and install. For more information, visit the Safari Technology Preview website.