Web Compatibility
Interop 2026 is not only a shiny-feature list. Some of the highest-value work is compatibility cleanup: aligning module loading behavior, matching scroll-event timing with animation timing, and finally removing engine-specific paper cuts such as prefixed user-select habits.
<script type="module">
import { boot } from '/app.js';
boot();
</script>
<style>
.handle {
-webkit-user-select: none;
user-select: none;
}
</style>Compatibility Work Often Matters More Than a New API
Users do not care whether a bug comes from an old quirk or a missing headline feature. They care that the site behaves the same. That is why compat work deserves the same attention as brand-new platform surface area.
Module Loading Is Part of Compat Now
ES modules are baseline, but subtle differences in loading, execution order, or dependency timing still ripple into real applications. Interop effort here reduces the number of loader edge cases frameworks have to absorb for you.
Timing Bugs Are Product Bugs
Scroll-event timing relative to animation and rendering work can make a polished surface feel laggy or inconsistent even when the code is “correct.” Aligning those timelines across engines is compatibility work with user-visible payoff.
Keep Shipping Defensive CSS
Compat work does not mean you stop writing resilient code. Keep the unprefixed property, keep the prefixed fallback only where it still buys you something, and delete historical cargo-cult prefixes once the platform no longer needs them.
