WebStorm 2026.1 Is Out — Let's Break It Down Live
In a Nutshell
WebStorm 2026.1 shifts to the official TypeScript language service as the default engine, replacing their custom Kotlin implementation to achieve guaranteed type accuracy and better performance on large projects. Framework support improved across React 19 directives, Angular templates, Vue type checking in templates, Svelte 5 generics, and Astro language server integration. New AI capabilities include Next Edit Suggestions, an experimental features plugin with Recap/Insights/Group, and upcoming Skills registry for consistent agent configuration.
These notes were generated by AI and may contain inaccuracies.
Jason Torres and Denny Kost introduced themselves as the new developer advocates for WebStorm and JavaScript tooling at JetBrains. The release of WebStorm 2026.1 was delayed due to technical issues but expected to be available within minutes to days.
The stream is being recorded and will be available on YouTube. Viewers can pause and return later. Questions can be submitted through the YouTube chat and will be addressed during the session.
The primary focus of the update centers on handling TypeScript at scale as projects grow larger and more modular. The IDE needs to maintain accuracy and performance with larger codebases.
The service-powered TypeScript engine is now enabled by default. WebStorm now relies directly on the official TypeScript language service rather than maintaining a separate Kotlin-based type engine. This provides more accurate type inference, lower CPU usage on larger projects, and ensures IDE behavior matches actual build output.
The team previously built their own type engine in Kotlin to achieve fast type inference, similar to the TypeScript team's approach of moving to Go. However, achieving 100% correctness proved challenging, particularly with the final 5% of edge cases. The decision was made to abandon the custom approach in favor of using the official TypeScript language server for guaranteed correctness.
Sign in to read the full notes
Get access to AI-generated notes, topic timestamps, and more.