TypeScript 6.0 Migration Guide: Stricter Defaults, Temporal API, and the Road to 7.0
javascript
dev.to
Originally published on NextFuture TypeScript 6.0 shipped on March 23, 2026, and it's not just another point release. It's the last major version built on the JavaScript compiler before the team rewrites everything in Go for TypeScript 7.0. That makes 6.0 both a feature release and a farewell — and it introduces enough breaking changes that you can't just bump the version and hope for the best. I've migrated three production Next.js apps to TypeScript 6.0 over the past week. Here's what actu