--- title: WebKit Features for Safari 27.2 | daily.dev description: Safari 27.2 refines Customizable Select, renames a Grid Lanes CSS property, and ships 20 bug fixes. A new ::field-content pseudo-element lets you style the... canonical: https://daily.dev/posts/webkit-features-for-safari-27-2-ujx5lb1g6 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: WebKit Features for Safari 27.2 | daily.dev og:description: Safari 27.2 refines Customizable Select, renames a Grid Lanes CSS property, and ships 20 bug fixes. A new ::field-content pseudo-element lets you style the... og:url: https://daily.dev/posts/webkit-features-for-safari-27-2-ujx5lb1g6 og:image: https://api.daily.dev/og/posts/Ujx5LB1g6.png og:image:alt: WebKit Features for Safari 27.2 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # WebKit Features for Safari 27.2 **[WebKit](https://daily.dev/sources/webkit)** · 7 min read · 0 upvotes · 0 comments ## Summary Safari 27.2 refines Customizable Select, renames a Grid Lanes CSS property, and ships 20 bug fixes. A new ::field-content pseudo-element lets you style the selected option's text without needing the selectedcontent element. The CSS Working Group renamed flow-tolerance to fit-tolerance, while the old name stays as a deprecated alias. Large select pickers now stay within the viewport via safe alignment. Fixes span accessibility, animations, media, WebGPU, WebRTC, and networking, including a cookie lifetime bug tied to CNAME-based domains. The update is available on iOS, iPadOS, visionOS, and macOS 27.2. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### what is the fit-tolerance CSS property in Grid Lanes fit-tolerance controls how picky the browser is when choosing which column or row to place the next grid item in, treating columns within a set distance of each other as tied and picking the first. It was renamed from flow-tolerance by the CSS Working Group, with a default value of 1em; the old name still works as a deprecated alias in Safari 27.2. _Track CSS Grid Lanes property changes like this on daily.dev before they break your layout code._ ### how do I style the selected option text in a customizable select without using selectedcontent Safari 27.2 adds the ::field-content pseudo-element, which lets you style the text of the selected option displayed in the button without needing the selectedcontent element. This complements existing Customizable Select features like appearance: base-select, and works alongside other refinements such as improved vertical centering and inherited text-overflow. _Developers adopting Customizable Select can follow browser-by-browser support shifts on daily.dev._ ### why does Safari cap cookie lifetime to seven days for CNAMEd domains Prior to Safari 27.2, cookies set by a top-level navigation's own response were incorrectly capped to a seven-day lifetime whenever the site's hostname was CNAMEd to a different registrable domain. This was fixed as part of the 20 bug fixes included in the Safari 27.2 release, restoring normal cookie lifetime behavior in that scenario. _Developers debugging cookie expiration quirks can track browser fix notes like this on daily.dev._ ## Similar posts on daily.dev - [News from WWDC26: WebKit in Safari 27 beta](https://daily.dev/posts/news-from-wwdc26-webkit-in-safari-27-beta-cz81svuy5) · WebKit · 12 upvotes · 0 comments - [Issue \#745: Safari's 58 new features — Frontend Focus](https://daily.dev/posts/issue-745-safari-s-58-new-features-frontend-focus-4cvtdr1ox) · Frontend Focus · 3 upvotes · 0 comments - [Web Technology Sessions at WWDC26](https://daily.dev/posts/web-technology-sessions-at-wwdc26-stxxnbso1) · WebKit · 36 upvotes · 2 comments - [New to the web platform in July](https://daily.dev/posts/new-to-the-web-platform-in-july-pfpy0b4gh) · web.dev · 0 upvotes · 0 comments --- Tags: [#css](https://daily.dev/tags/css), [#safari](https://daily.dev/tags/safari) [View this post on daily.dev](https://daily.dev/posts/webkit-features-for-safari-27-2-ujx5lb1g6) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"WebKit Features for Safari 27.2","url":"https://daily.dev/posts/webkit-features-for-safari-27-2-ujx5lb1g6","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/webkit-features-for-safari-27-2-ujx5lb1g6"},"datePublished":"2026-10-26T18:52:11.738Z","dateModified":"2026-10-26T19:12:49.469Z","description":"Safari 27.2 refines Customizable Select, renames a Grid Lanes CSS property, and ships 20 bug fixes. 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