Baseline digest: October 2025 developments

October brought a mix of status changes, community activity, and tooling updates for the Baseline project. Here's a rundown of what happened.

Top-level await regresses in Safari

A regression in Safari's implementation of top-level await has caused the feature to move from Widely available to Limited availability in Baseline. Top-level await allows the await keyword to be used outside of an async function, which matters for developers loading modules asynchronously. The pull request that reverted the feature's status provides additional context on when the change happened, and more details will appear in future Baseline content.

Newly and Widely available updates

Two features became Baseline Newly available in October:

  • Same-document view transitions
  • WebRTC encoded transform

The same-document view transitions milestone is notable because it means more of the View Transition API is now interoperable. Also, YouTube's Jay Rungta published a post on URLPattern becoming Newly available.

Three features moved to Widely available status:

  • The HTML inert attribute
  • The roundRect method on canvas rendering contexts
  • The createConicGradient method on canvas rendering contexts

Baseline Hackathon wraps up

The Baseline Hackathon, which began in September, concluded in October. With 3,000 applicants and hundreds of project submissions competing for a $10,000 prize pool, the event highlighted the inventiveness of the web developer community. Organizers eventually selected three winners, and the full project gallery shows all eligible submissions.

Windsurf IDE adds Baseline support

Windsurf, the Visual Studio Code-derived IDE, added built-in Baseline support in version 1.100. Users now see Baseline compatibility information when hovering over HTML and CSS features in their code. The functionality ships as a core part of Windsurf, so no additional installation is required.

A Baseline hover card as shown in the Windsurf IDE as the user hovers over a feature.

This integration reduces the need to switch contexts when checking web feature support during development.

Discord community launches Baseline bot

The "web dev and web design" Discord community released a bot that looks up the Baseline status of any web feature. It's designed to give developers instant compatibility checks during discussions, reducing the need to leave chat to verify interoperability information.

The Baseline bot showing data on a web feature in the web dev and web design Discord community.

Since developers frequently move across communication tools, having Baseline data available within chat platforms helps keep conversations informed. If you spotted any Baseline-related news that didn't make this digest, you can report it here for a future edition.