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Microsoft released TypeScript 6.0 on March 23, the last version of the compiler written in JavaScript. The release introduces strict-by-default settings and deprecates legacy features ahead of TypeScript 7.0, a full Go rewrite that has shown up to 10x faster compilation in benchmarks.

Microsoft has released TypeScript 6.0, the final major version built on the original JavaScript compiler codebase. The release introduces sweeping default changes, deprecates legacy module formats, and adds a migration flag to prepare codebases for TypeScript 7.0, which will be built entirely in Go.

Microsoft ships the final JavaScript-based TypeScript release, overhauling defaults and deprecating legacy options ahead of a Go-powered compiler rewrite in version 7.0.

The Go team has accepted a proposal from co-designer Robert Griesemer to add type parameters to concrete methods, reversing a longstanding FAQ position and closing one of the language's most persistent feature gaps since generics arrived in Go 1.18.

TypeScript 6.0 beta is the last version built on JavaScript. The Go-based TypeScript 7.0 promises 10x faster builds.

Go 1.26 RC3 shipped February 4 with the Green Tea GC as default, an experimental SIMD package, post-quantum TLS, and enhanced generics.