Overview

Interop 2026 represents a collaborative initiative between Apple, Google, Igalia, Microsoft, and Mozilla to ensure targeted web platform features reach cross-browser parity. The program has proven wildly effective since its 2021 launch, with all browsers converging near 95-100% compatibility scores by year’s end.

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Key Facts

  • Multi-year initiative (2021-2026) between major browser vendors - eliminates the web fragmentation that has plagued developers for decades
  • Progress charts show browsers racing from 29-80% compatibility to 95-100% by year-end - developers can finally rely on features working consistently across all browsers
  • Cross-document View Transitions will enable SPA-style page transitions with zero JavaScript - websites can feel as smooth as native apps without complex frameworks
  • JavaScript Promise Integration for WebAssembly allows async suspension - C/C++ code can compile to web without rewriting synchronous APIs

Why It Matters

This represents the end of browser compatibility hell that has forced developers to write different code for different browsers, potentially ushering in a new era of web development where features work uniformly across platforms.