The first major update to JetBrains WebStorm, version 2026.1, is here, bringing support for TypeScript 6, better Svelte support, and several AI-related features.
Starting with TypeScript 6, which was released a few days back, WebStorm 2026.1 now properly handles the new compiler defaults that ship with the language update. For instance, TypeScript no longer infers your project's rootDir automatically, so if your project relied on that old behavior, you'd have to specify your root path manually in your config file.
In large codebases, TypeScript can become sluggish, so 2026.1 fixes that by defaulting to the service-powered TypeScript engine. This just means WebStorm now directly uses the official TypeScript Language Service built by Microsoft to analyze your code. This offloads a ton of processing from the IDE itself, resulting in faster navigation, more responsive refactoring, and error highlighting.
In Svelte codebases, WebStorm now supports the generics attributes in script tags. This update means you get proper usage search, navigation, and refactoring for your type parameters. The IDE also adds support for the new @attach directive and bundles the latest versions of the Svelte language server packages.
Still on the topic of web frameworks, WebStorm 2026.1 now supports arrow functions, the instanceof operator, regular expressions, and spread syntax in Angular templates. This catches the IDE up with syntax additions from Angular 21.
On Linux, WebStorm now runs using Wayland by default. This change should provide better high-resolution display scaling and more reliable input handling. The IDE will fall back to X11 if your environment is not supported.
Next Edit suggestions will no longer consume the AI quota of your JetBrains AI Pro, Ultimate, and Enterprise subscriptions and, in JetBrains' words, "go beyond traditional code completion for JavaScript, TypeScript, HTML, and CSS."
Other changes version 2026.1 brings include in-terminal completion for PowerShell, which suggests commands and parameters as you type. It also integrates more AI agents like Claude Agent and Codex directly into the IDE's chat window.
Modern CSS color functions and spaces like oklab and hwb are now recognized and have color previews. The update also officially unbundles Code With Me, which is being sunsetted and moved to a plugin before its complete deactivation in Q1 2027.