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Have you ever wished you could write simple CSS to declare a color, and then have the browser figure out whether black or white should be paired with that color? Well, now you can, with contrast-color(). Here’s how it works. Imagine we’re building a website or a web app, and the design calls for a bunch of buttons with different background colors. We can create a variable named --button-color to h

It’s been possible to create gorgeous layouts on the web for decades, but often refining the details to perfection can take a lot of effort. Arguably too much effort, and developers just don’t have the time. Happily, the last few years of CSS have seen a lot of new tools, sometimes very simple tools, that when used in a smart fashion suddenly make polishing graphic design details incredibly easy.

Support for text-wrap: pretty just shipped in Safari Technology Preview, bringing an unprecedented level of polish to typography on the web. Let’s take a look at what the WebKit version of pretty does — it’s probably a lot more than you expect. Then, we’ll compare it to balance and the other text-wrap values to better understand when to use which one. Ideas of what makes for “good” typography are

Mar 31, 2025 by Jen Simmons, Saron Yitbarek, Jon Davis, Razvan Caliman, Karl Dubost, Brady Eidson, Elika Etemad, Youenn Fablet, Matthew Finkel, Simon Fraser, Timothy Hatcher, David Johnson, Anne van Kesteren, Daniel Liu, Keith Miller, Rupin Mittal, Tim Nguyen, Pascoe, Abrar Rahman Protyasha, Richard Robinson, Lily Spiniolas, Brandon Stewart, John Wilander and Luming Yin ContentsDeclarative Web Pus

Mar 28, 2025 by Jen Simmons, Saron Yitbarek, Elika Etemad, Brandon Stewart ContentsCombining Flexbox and GridItem DirectionItem WrapItem PackItem SlackThe Overall PlanWhat do you think? CSS Grid and Flexbox brought incredible layout tools to the web, but they don’t yet do everything a designer might want. One of those things is a popular layout pattern called “masonry” or “waterfall,” which curren

ContentsThe status quoHow to use Declarative Web PushA note on backwards compatibilityWhat if I can’t send the notification description through the internet?Standards work Web Push notifications are a powerful and important part of the web platform. As someone’s very famous uncle once said, with great power comes great responsibility. When we added Web Push to WebKit we knew it was imperative to m

ContentsIntroducing Interop 2025Focus Areas for 2025Investigation Efforts Look Ahead Exciting news for web developers, designers, and browser enthusiasts alike — Interop 2025 is here, continuing the mission of improving cross-browser interoperability. For the fourth year in a row, we are pleased to collaborate with Bocoup, Igalia, Google, Microsoft, and Mozilla to smooth out inconsistencies betwee

With close of 2024 came the end of another year of the Interop project — the annual collaboration between browser engine teams to improve the interoperability of web technology by collectively focusing on fixing bugs and improving features in specific areas. In 2024, there were 17 such focus areas: Accessibility, CSS Nesting, Custom Properties, Declarative Shadow DOM, font-size-adjust, HTTPS URLs

Dec 9, 2024 by Jen Simmons, Ada Rose Canon, David Degazio, Yoel Hawa, Etienne Segonzac, and John Wilander ContentsCSSSpatial videos and photosWebXRGenmojiMediaHTMLWebAssemblyWeb APIJavaScriptSecurity and PrivacyWeb InspectorWebDriverWKWebViewBug Fixes and moreUpdating to Safari 18.2Feedback Today marks the arrival of Safari 18.2. With it, WebKit adds 61 new features and 111 resolved issues. Highli

How’d you like to use CSS to easily create a border from an image or gradient? Like this… For years, we’ve had the ability to create a border using border-image — where an image gets sliced up into nine pieces and reassembled to separately construct the corners and sides of a box. Now with background-clip: border-area, we can instead apply a background image to a border. It can simply fill the who

Oct 21, 2024 by Jen Simmons and Elika Etemad, with Brandon Stewart ContentsThe remaining debate over syntaxDesign PrinciplesSimplicity | LearnabilityMinimum Redundancy | Repurposing | Use What Is ThereExtensibilitySummaryDesign by committee Back in April 2024, we wrote about “Masonry” layout in CSS and the ongoing work to bring this feature to browsers. In it, we described a debate about whether o

ContentsNew in Safari 18Web apps for MacCSSSpatial WebHTMLJavaScriptWeb APICanvasManaged Media SourceWebRTCHTTPSWebGLWeb InspectorPasskeysSafari ExtensionsApple PayDeprecationsBug Fixes and moreUpdating to Safari 18.0Feedback Safari 18.0 is here. Along with iOS 18, iPadOS 18, macOS Sequoia and visionOS 2, today is the day another 53 web platform features, as well as 25 deprecations and 209 resolve

Jul 16, 2024 by John Wilander, Charlie Wolfe, Matthew Finkel, Wenson Hsieh, and Keith Holleman When we invented Private Browsing back in 2005, our aim was to provide users with an easy way to keep their browsing private from anyone who shared the same device. We created a mode where users do not leave any local, persistent traces of their browsing. Eventually all other browsers shipped the same fe

Jun 10, 2024 by Jen Simmons, Jon Davis, Karl Dubost, Anne van Kesteren, Marcos Cáceres, Ada Rose Canon, Tim Nguyen, Sanjana Aithal, Pascoe, and Garrett Davidson ContentsWebXRCSSWeb apps for MacSafari ExtensionsSpatial mediaHTMLMediaWebRTCPasskeysHTTPSJavaScriptWeb APICanvasWebGLWeb InspectorWKWebViewApple PayDeprecationsBug Fixes and moreHelp us Beta TestFeedback The last year has been a great one

Happy May! It’s time for another release of Safari — our third significant update of 2024. With just a month until WWDC24 and the unveiling of what’s coming later this year, we are happy to get these 7 features and 22 bug fixes into the hands of your users today. CSS There are several exciting new CSS features in Safari 17.5, including text-wrap: balance, the light-dark() color function, and @star

UPDATE October 2024: Since this article was published, members of the CSS Working Group have concluded that all of the grid abilities described here — variable-width tracks, explicit placement, spanning, and subgrids — are worth including in masonry layout, and are possible to implement performantly. There is now an official W3C Working Draft for CSS Grid Layout Module Level 3 documenting how it w

As announced on browserbench.org today, in collaboration with other browser engine developers, Apple’s WebKit team is excited to introduce Speedometer 3.0, a major update that better reflects the Web of today. It’s built together by the developers of all major browser engines: Blink, Gecko, and WebKit with hundreds of contributions from companies like Apple, Google, Intel, Microsoft, and Mozilla.

ContentsArchitectural improvementsWeb AppsForm elementsCSSWeb APIJavaScriptMediaSVGWebGLWeb AssemblyWeb InspectorChanges to SafariSafari ExtensionsWeb AuthenticationBug Fixes and moreUpdating to Safari 17.4Feedback Just like Safari 15.4 and Safari 16.4, this March’s release of Safari 17.4 is a significant one for web developers. We’re proud to announce another 46 features and 146 bug fixes. You ca

We’re very excited to introduce a new HTML form control as part of Safari 17.4: a switch. Two switches as seen on iOS, with the second switch using a custom CSS accent-color. The HTML for this example looks roughly like this: <style> .special { accent-color: papayawhip } </style> <input type=checkbox switch checked> <input type=checkbox switch checked class=special> Switches are a popular control

ContentsThe Interop ProjectInterop 2023Interop 2024The 2024 Focus AreasThe 2024 Investigation projectsTrack the progressOur Commitment The web is amazing. It makes collaborating, learning, and connecting easy for billions of people, because it’s intentionally designed to run on radically different devices. It’s your job as a web developer to ensure your project works in every browser and for every

ContentsHTMLCSSImages and videoJavaScriptWeb APIWeb AppsWebGLPrivacyWeb InspectorFixes for Interop 2023 and moreUpdating to Safari 17.2Feedback Web technology is constantly moving forward, with both big new features and small subtle adjustments. Nowadays, web developers expect web browsers to update multiple times a year, instead of the once or twice a year typical of the late 2000s — or the once

Sep 18, 2023 by Jen Simmons and the Safari / WebKit Team Today’s the day for Safari 17.0. It’s now available for iOS 17 and iPadOS 17. [Update September 26th] And now, Safari 17.0 is available for macOS Ventura, and macOS Monterey, and macOS Sonoma. Safari 17.0 is also available in the vision OS Simulator, where you can test your website by downloading the latest beta of Xcode 15, which supports t