WebStorm 2026.1.4

Alright folks, WebStorm 2026.1.4 is here and it is packing some serious heat. Let me break down what changed, what got faster, and whether you should hit that update button right now.

⚡ Performance Push

JetBrains has been on a performance crusade with the 2026.1 cycle, and 2026.1.4 is no exception. TypeScript indexing is noticeably snappier — full project indexing on a 50,000-file monorepo dropped from 3 minutes to about 2 minutes 10 seconds. That is a 28% improvement on cold cache.

• Startup speed: 22% faster cold start on macOS
• Memory usage: 12% reduction in heap consumption during large refactors
• Git operations: Blame annotations load 40% faster on large files

🐛 Bug Bashes

This release squashes 37 reported issues. The highlight reel includes a fix for the ESLint plugin hanging on large configs, resolved stuttering in the Svelte template language service, and a correction to the built-in Prettier formatter that was double-wrapping JSX attributes.

✨ New Goodies

• AI Assistant context awareness — Junie now reads your full workspace configuration before suggesting refactors. It understands monorepo structures and will not propose moves that break cross-package imports.
• TypeScript 5.9 support — Full support for the latest TypeScript features including the new "using" declarations and improved isolatedDeclarations output.
• Tailwind CSS v4 class completion — The CSS language service now completes v4 utility classes with proper previews showing the resolved CSS output.
• Improved Angular signals debugging — The debugger now displays Signal and computed values in the Variables pane with live updates.

⬆️ Upgrade at Your Own Pace

The update is available through JetBrains Toolbox or直接从 IDE 内部。 No breaking plugin changes were reported during the RC phase. Give it a day or two if you are risk-averse, but honestly, this is one of the safer point releases in recent memory.