Winsage
February 13, 2026
Microsoft Edge is actively participating in the Interop project, now in its sixth year, collaborating with companies like Mozilla, Igalia, Google, and Apple to improve web interoperability. For Interop 2026, focus areas include expanding the CSS attr() function, enhancing color tooling, enabling container style queries, allowing custom highlights, improving the interoperability of dialog elements, enhancing the fetch() API, boosting IndexedDB performance, integrating WebAssembly with JavaScript promises, implementing media pseudo-classes, enhancing the Navigation API, allowing multiple custom element registries, creating scroll-driven animations, improving CSS scroll snapping behavior, adding support for the shape() CSS function, enhancing View Transitions, addressing web compatibility issues, improving WebRTC interoperability, and advancing the WebTransport API. Additionally, investigation efforts will focus on accessibility testing, developing a JPEG XL test suite, enhancing mobile testing infrastructure, and refining the WebVTT specification. A Top Developer Needs dashboard has been launched to monitor ongoing interoperability challenges. The previous Interop 2025 project achieved significant milestones, including reliable CSS anchor positioning, smoother view transitions, simplified Navigation API implementation, alignment on Core Web Vitals, streamlined JSON module scripts, and accessible disclosure widgets. All participating browsers in Interop 2025 scored at least 98%.
