JavaScriptにおけるasync/await呼び出しのスタックトレースの困難と実装
JSConf JP 2025
News from WWDC25: WebKit in Safari 26 beta
Jun 9, 2025 by Jen Simmons, Saron Yitbarek, Jon Davis, Richard Robinson, Eddy Wong, Brandel Zachernuk, Marcos Cáceres, Tim Nguyen, Daniel Liu, Razvan Caliman, Blaze Burg, Qianlang Chen, Brian Weinstein, Aditya Keerthi, Karl Dubost, David Johnson, Luming Yin ContentsSVG IconsEvery site can be a web app on iOS and iPadOSHDR ImagesWebKit in SwiftUI<model> on visionOSImmersive video and audio on visio
News from WWDC24: WebKit in Safari 18 beta
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
Optimizing WebKit & Safari for Speedometer 3.0
Apr 10, 2024 by Alan Baradlay, Antti Koivisto, Matt Woodrow, Patrick Angle, Ryosuke Niwa, Vitor Ribeiro Roriz, Wenson Hsieh, and Yusuke Suzuki The introduction of Speedometer 3.0 is a major step forward in making the web faster for all, and allowing Web developers to make websites and web apps that were not previously possible. In this article, we explore ways the WebKit team made performance opti
Implementing Vertical Form Controls
Safari 17.4 adds vertical writing mode support for form control elements across macOS, iOS, iPadOS, and visionOS. Setting written text vertically is commonly observed in East Asian languages. For example, Chinese, Japanese, and Korean (CJK) may be written vertically and read top-to-bottom, flowing in lines from right to left. Similarly, Traditional Mongolian is a vertical script that flows in line
Update on apps distributed in the European Union - Support - Apple Developer
Introduction Apple has provided changes to iOS, iPadOS, Safari, and the App Store that impact developers’ apps in the European Union (EU) to comply with the Digital Markets Act (DMA). They create additional options for developers, including how they can distribute apps on iOS and iPadOS, process payments, use web browser engines in iOS and iPadOS apps, request interoperability with hardware and so
WebKit Documentation
WebKit Overview WebKit Overview Build & Debug Deep Dive Getting Started Infrastructure Other Ports WebKit Overview¶ WebKit is a cross-platform web browser engine. On iOS and macOS, it powers Safari, Mail, Apple Books, and many other applications. Getting Up and Running¶ Downloading the Source Code¶ git clone https://github.com/WebKit/WebKit.git WebKit Building WebKit¶ Compilation instructions are
Safari releases are development hell ★★★★★
Safari 16.4 rolled out last week, and for us it's been a nightmare. We make the browser-based game creation app Construct. Early versions of Safari 16.4 broke opening projects, previewing projects, and all existing content published with Construct, all in different ways. I wanted to share our experience so customers, developers, regulators, and Apple themselves can see what we go through with what
Release Notes for Safari Technology Preview 157
Safari Technology Preview Release 157 is now available for download for macOS Monterey 12.3 or later and macOS Ventura. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS Monterey, or System Settings under General → Software Update on macOS Ventura. This release includes WebKit changes between: 255077@main…255891@main
Release Notes for Safari Technology Preview 153
Safari Technology Preview Release 153 is now available for download for macOS Monterey 12.3 or later and macOS Ventura beta. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS Monterey, or System Settings under General → Software Update on macOS Ventura. This release includes WebKit changes between: 253169@main…253847@
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305636 – Page with Noto Color Emoji font loads extremely slowly in WebKit
WebKit Features in Safari 18.5
How Bun supports V8 APIs without using V8 (part 1) | Bun Blog
Add invoketarget & invokeaction attributes by keithamus · Pull Request #18794 · WebKit/WebKit
GitHub - WebKit/Documentation: Documentation for the WebKit project, hosted at https://docs.webkit.org.
Bun v0.7.1 | Bun Blog
The Safari bug that never was
Cap cookie lifetimes to 7 days for responses from third party IP addresses by whsieh · Pull Request #5347 · WebKit/WebKit
WebKit/Source/WebCore/platform/network/HTTPHeaderNames.in at main · WebKit/WebKit
Implement importmaps by Constellation · Pull Request #4675 · WebKit/WebKit