Baseline Baseline: March 2026 Digest

Another month, another digest of browser compatibility. Is it time to ship that feature yet?

What changed

• The Baseline project continues to track web platform feature support across major browsers.
• March 2026 data shows incremental improvements in support for several APIs, though no major breakthroughs were highlighted.
• Specific metrics on adoption rates or performance impact of these features were not detailed.

Why it matters

Baseline aims to provide a signal for when web platform features are broadly supported enough for developers to use in production without extensive polyfills or feature detection. This digest, like its predecessors, offers a snapshot of the current compatibility landscape. The honest version: It’s a dashboard for risk-averse frontend engineers. If your goal is to minimize canIuse.com checks and avoid shipping custom solutions for older browser versions, Baseline is your signal.

The catch

The catch: This digest is observational, not prescriptive. It tells you what is supported, not what should be adopted. The data presented is a point-in-time snapshot, and the underlying browser versions tracked might not align perfectly with your target audience’s actual usage. Furthermore, Baseline focuses on feature availability, not necessarily performance implications or bundle-size impact when using polyfills or alternative implementations.

Ship it

Review the latest Baseline data for features you are considering adopting. Pairs with: caniuse-lite for granular, project-specific compatibility checks. If a feature has been Baseline for over six months and your target browsers are covered, consider removing associated polyfills to shave off ~50KB from your JS bundles. However, always test in a staging environment before rolling out to production.

Bottom line: Baseline continues its slow march toward indicating broad web feature support, but adoption still requires careful consideration of your specific audience and testing.