31
Introducing Riptide: WebKit's Retreating Wavefront Concurrent Garbage Collector
The new Riptide garbage collector in WebKit leads to a five-fold improvement in latency in the JetStream/splay-latency test.
WebKit Blog
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Visit webkit.org → RSS feedOn Hacker News Sep 2008 – Nov 2026
Web & Frontend 66Software Engineering 23Security & Privacy 14Systems & Performance 9Design & UX 8Tools & Productivity 4
32
Using: Has() as a CSS Parent Selector and much more
It’s been a long-standing dream of front-end developers to have a way to apply CSS to an element based on what’s happening inside that element.
33
Introducing the B3 JIT compiler
WebKit's FTL JIT now uses a new backend on OS X — the Bare Bones Backend, or B3 for short, replaces LLVM as the low-level optimizer.
34
Preventing Tracking Prevention Tracking
This blog post covers enhancements to Intelligent Tracking Prevention (ITP) included in Safari on iOS and iPadOS 13.3, Safari 13.0.4 on macOS Catalina, Mojave, and High Sierra.
35
A New Bytecode Format for JavaScriptCore
In revision r237547 we introduced a new bytecode format for JavaScriptCore (JSC).
36
Assembling WebAssembly
WebAssembly in WebKit.
37
Privacy-Preserving Ad Click Attribution for the Web
A typical website is made of numerous components coming from a wide variety of sources.
38
Bringing Back Horizontal Rules in HTML Select Elements
In September 2023, Safari 17.0 on macOS shipped a small but interesting change to the <select> element.
39
Protecting Against HSTS Abuse
HTTP Strict Transport Security (HSTS) is a security standard that provides a mechanism for web sites to declare themselves accessible only via secure connections, and to tell web browsers where to go to get that secure version.
40
Private Browsing 2.0
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.
41
WebDriver Support in Safari 10
Starting with Safari 10 on OS X El Capitan and macOS Sierra, Safari comes bundled with a WebDriver implementation that's maintained by the Web Developer Experience team at Apple.
42
Intelligent Tracking Prevention
Note: Read about improvements to this technology in recent blog posts about Intelligent Tracking Prevention, and the Storage Access API.
43
New WebKit Features in Safari 12.1
There are many improvements and new web platform features in WebKit that are now available with the release of Safari 12.1, included with macOS Mojave 10.14.4 and iOS 12.2.
44
Implementing Vertical Form Controls
Safari 17.4 adds vertical writing mode support for form control elements across macOS, iOS, iPadOS, and visionOS.
45
Rolling the dice with CSS random()
Random functions in programming languages are amazing.
46
Unusual speed boost: size matters
One of my concerns last year was that while WebKit was getting faster on common benchmarks, some operations were getting slower as a byproduct of new features and optimizations.
47
On the Road to WebRTC 1.0, Including VP8
Safari 11 was the first Safari version to support WebRTC.
48
Speculation in JavaScriptCore
This post is all about speculative compilation, or just speculation for short, in the context of the JavaScriptCore virtual machine.
49
How Web Content Can Affect Power Usage
Users spend a large proportion of their online time on mobile devices, and a significant fraction of the rest is users on untethered laptop computers.
50
A gentle introduction to anchor positioning
Anchor positioning allows you to place an element on the page based on where another element is.
51
URL Parsing in WebKit
URLs have been used for decades now and you'd would think they would have consistent behavior…
52
New Safari developer tools provide insight into CSS Grid Lanes
You might have heard recently that Safari Technology Preview 234 landed the final plan for supporting masonry-style layouts in CSS.
53
Locking in WebKit
We recently replaced all spinlocks, OS-provided mutexes, and condition variables in WebKit with the new WTF::Lock and WTF::Condition — these new primitives have some cool properties.
54
News from WWDC22: WebKit Features in Safari 16 Beta
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.
55
Payment Request API for Apple Pay
We’re pleased to announce that Safari 11.1 on macOS and Safari on iOS 11.3 now support the W3C Payment Request API for conducting Apple Pay transactions on the web.
56
Designing Websites for iPhone X
The section below about safe area insets was updated on Oct 31, 2017 to reflect changes in the iOS 11.2 beta.
57
Introduction to WebKit Content Blockers
Describing content blocking rules in a structured format ahead-of-time, rather than running extension-provided code.
58
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.
59
Help choose the syntax for CSS Nesting
The CSS Working Group is continuing a debate over the best way to define nesting in CSS.
60
Webkit - Introducing SquirrelFish Extreme
Just three months ago, the WebKit team announced SquirrelFish, a major revamp of our JavaScript engine featuring a high-performance bytecode interpreter.