The User Activation API
As a web developer, you’ve probably noticed that certain APIs only work if an end-user clicks or taps on an HTML element. For example, if you try to run the following code in Safari’s Web Inspector, it will result in an error: await navigator.share({ text: "hi" }); NotAllowedError: The request is not allowed by the user agent or the platform in the current context, possibly because the user denied
Help choose the syntax for CSS Nesting
The CSS Working Group is continuing a debate over the best way to define nesting in CSS. And if you are someone who writes CSS, we’d like your help. Nesting is a super-popular feature of tools like Sass. It can save web developers time otherwise spent writing the same selectors over and over. And it can make code cleaner and easier to understand. Unnested CSS .class1 { color: green; } .class1 .cla
News from WWDC22: WebKit Features in Safari 16 Beta
ContentsWeb Inspector ExtensionsContainer QueriesWeb Push for macOSSubgridFlexbox InspectorAccessibility ImprovementsAnimation ImprovementsOverscroll BehaviorShared WorkerAnd moreFeedback WebKit has had a big year, with over 162 new features and improvements shipping in WebKit browsers — including Safari 15.2, Safari 15.4, and Safari 15.5. Features from earlier this year include dialog element, la
Introducing Private Click Measurement, PCM
This blog post covers a new feature called Private Click Measurement, or PCM, for measuring ad clicks across websites and from iOS apps to websites. It is part of iOS and iPadOS 14.5 betas. Motivation and Goals Classic ad attribution on the web is done with cookies carrying user or device IDs. Such attribution constitutes cross-site tracking which WebKit is committed to preventing. Websites should
MediaRecorder API
Safari Technology Preview 105 and Safari in the latest iOS 14.3 beta enabled support for the MediaRecorder API by default. This API takes as input live audio/video content to produce compressed media. While the immediate use case is to record from the camera and/or microphone, this API can take any MediaStreamTrack as input, be it a capture track, coming from the network using WebRTC, or generated
New WebKit Features in Safari 14
With the release of Safari 14 for macOS Big Sur, iPadOS 14, iOS 14, and watchOS 7, WebKit brings significant improvements to performance and privacy along with a host of new features for web developers. Take a look at all of the improvements WebKit is adding with the release of Safari 14. Safari Web Extensions This release brings support for Safari Web Extensions. They are a type of extension prim
CNAME Cloaking and Bounce Tracking Defense
This blog post covers several enhancements to Intelligent Tracking Prevention (ITP) in Safari 14 on macOS Big Sur, Catalina, and Mojave, iOS 14, and iPadOS 14 to address our latest discoveries in the industry around tracking. CNAME Cloaking Defense ITP now caps the expiry of cookies set in so-called third-party CNAME-cloaked HTTP responses to 7 days. On macOS, this enhancement is specific to Big S
Meet Face ID and Touch ID for the Web
People often see passwords are the original sin of authentication on the web. Passwords can be easy to guess and vulnerable to breaches. Frequent reuse of the same password across the web makes breaches even more profitable. As passwords are made stronger and unique, they can quickly become unusable for many users. Passwords indeed look notorious, but are passwords themselves the problem, or is it
New WebKit Features in Safari 13.1
This year’s spring releases of Safari 13.1 for macOS Catalina, iPadOS, iOS, and watchOS bring a tremendous number of WebKit improvements for the web across Apple’s platforms. All of this with many more updates for improved privacy, performance, and a host of new tools for web developers. Here’s a quick look at the new WebKit enhancements available with these releases. Pointer and Mouse Events on i
Full Third-Party Cookie Blocking and More
This blog post covers several enhancements to Intelligent Tracking Prevention (ITP) in iOS and iPadOS 13.4 and Safari 13.1 on macOS to address our latest discoveries in the industry around tracking. Cookies for cross-site resources are now blocked by default across the board. This is a significant improvement for privacy since it removes any sense of exceptions or “a little bit of cross-site track
Intelligent Tracking Prevention 2.3
Note: Read about past updates to this technology in other blog posts about Intelligent Tracking Prevention, the Storage Access API, and ITP Debug Mode. Intelligent Tracking Prevention (ITP) version 2.3 is included in Safari on iOS 13, the iPadOS beta, and Safari 13 on macOS for Catalina, Mojave, and High Sierra. Enhanced Prevention of Tracking Via Link Decoration Our previous release, ITP 2.2, foc
Privacy Preserving Ad Click Attribution For the Web
A typical website is made of numerous components coming from a wide variety of sources. Many of the sources that make up a website are opaque to the user, and some third-party resources are designed to identify and track users as they browse the web, often in order to retarget ads and measure ad campaign effectiveness. The combination of third-party web tracking and ad campaign measurement has led
Intelligent Tracking Prevention 2.2
Note: Read about past updates to this technology in other blog posts about Intelligent Tracking Prevention, and the Storage Access API. The beta releases of iOS 12.3 and Safari on macOS Mojave 10.14.5 include an updated version of Intelligent Tracking Prevention (ITP). For purposes of developer communication, we’ll refer to it as ITP 2.2. Tracking Via Link Decoration Caps Client-Side Cookies to 1
New WebKit Features in Safari 12.1
For an up-to-date guide on dark mode in WebKit, including changes for iOS 13 and macOS Catalina, read our Dark Mode Support in WebKit post. With users’ ability to choose between light and dark color schemes, websites can start to look out of place, or worse, become a blinding and painful experience. To help websites better integrate with the dark appearance setting in macOS Mojave, WebKit provides
Introducing the JetStream 2 Benchmark Suite
Today we are announcing a new version of the JetStream JavaScript benchmark suite, JetStream 2. JetStream 2 combines a variety of JavaScript and WebAssembly benchmarks, covering an array of advanced workloads and programming techniques, and reports a single score that balances them using a geometric mean. JetStream 2 rewards browsers that start up quickly, execute code quickly, and run smoothly. O
Intelligent Tracking Prevention 2.1
Note: Read about past updates to this technology in other blog posts about Intelligent Tracking Prevention, and the Storage Access API. The beta releases of iOS 12.2 and Safari 12.1 on macOS High Sierra and Mojave include an updated version of Intelligent Tracking Prevention (ITP). For purposes of developer communication, we’ll refer to it as ITP 2.1. With this update we further reduce trackers’ a
IntersectionObserver in WebKit
Web authors often need to know when a particular element on a page becomes visible. The element could be an ad or a video whose viewability we want to compute. Or we might want to defer loading an image until it is visible. A common way to solve this problem is using polling, periodically computing the position of an element with respect to the viewport. However, polling is inefficient, wastes bat
Release Notes for Safari Technology Preview 68
Safari Technology Preview Release 68 is now available for download for macOS Mojave and macOS High Sierra. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS Mojave and from the Mac App Store’s Updates tab on macOS High Sierra. After updating to macOS Mojave, you may have to reinstall Safari Technology Preview. This re
Intelligent Tracking Prevention
Note: Read about improvements to this technology in recent blog posts about Intelligent Tracking Prevention, and the Storage Access API. The success of the web as a platform relies on user trust. Many users feel that trust is broken when they are being tracked and privacy-sensitive data about their web activity is acquired for purposes that they never agreed to. WebKit has long included features t
Release Notes for Safari Technology Preview 15
Safari Technology Preview Release 15 is now available for download for both macOS Sierra and OS X El Capitan 10.11.6. If you already have Safari Technology Preview installed, you can update from the Mac App Store’s Updates tab. This release covers WebKit revisions 206196–206808. This is the last release of Safari Technology Preview that will install and run on OS X El Capitan. To continue testing
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