Apple’s WebKit team outlines browser interoperability priorities for 2026

Following last week’s release of the Interop 2025 results, Apple and the other members of the browser interoperability group have now outlined their objectives for the year ahead. Here are the details.

’Here’s to another year of making the web better, together!’

As we covered last week, the Interop group published its year-end report detailing major gains in cross-browser compatibility throughout 2025, including Safari’s outsized jump in test pass rates and progress across key areas such as CSS, View Transitions, and the Navigation API.

That was the result of the objectives set by the Interop Group, a joint effort between Apple, Bocoup, Google, Igalia, Microsoft, and Mozilla to bring browser engines into closer alignment on the web platform features that matter most to developers.

Today, Apple’s WebKit blog published a comprehensive look at the objectives of Interop 2026, following last year’s call for community proposals.

According to the group, there will be 20 focus areas for 2026, including five rollovers from last year:

• Anchor Positioning
• Advanced attr()
• Container Style Queries
• contrast-color()
• Custom Highlights
• Dialog and popover additions
• Fetch Uploads and Ranges
• getAllRecords() for IndexedDB
• JSPI for Wasm
• Media pseudo-classes
• Navigation API
• Scoped Custom Element Registries
• Scroll-driven Animations
• Scroll Snap
• shape()
• View Transitions
• Web Compat
• WebRTC
• WebTransport
• CSS Zoom

The post goes on to break down what each focus area means in practice for developers, including efforts to improve CSS features like contrast-color() and shape(), as well as platform APIs such as the Navigation API and WebTransport.

In the post, Apple’s WebKit team also highlights its broader commitment to improving cross-browser compatibility as a part of the Interop Group:

“The WebKit team is committed to making these features work consistently across all browsers. Whether you’re building a design system, a single-page application, a video streaming platform, or anything in between, Interop 2026 is working to give you a more reliable foundation to build on.”

You can read Apple’s full breakdown of Interop 2026 here.

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