TypeScript 6.0 RC

#1

Post by johnz » Fri, Mar 06, 2026, 8:21 PM UTC

TypeScript 6.0 RC
devblogs.microsoft.com

Re: TypeScript 6.0 RC

#2

Post by culi » Fri, Mar 06, 2026, 9:07 PM UTC

For anyone who isn't aware, TypeScript does not use semantic versioning.

Though TypeScript 7.0 will be significant in that it will use the new Go compiler

Re: TypeScript 6.0 RC

#3

Post by pscanf » Fri, Mar 06, 2026, 9:14 PM UTC

As a user, I'm of course very excited about v7. As a developer of an app that _integrates_ TypeScript, however, I feel a bit uneasy seeing the API feature still marked as "not ready" on the roadmap.

On the other hand, I can understand leaving it as the last thing to do, after the foundation has set. Also, the TypeScript team has really done an amazing job all these years with backward compatibility, so that is extremely reassuring.

Maybe my uneasiness is just impatience to get to use the sped-up version in my app as well! :)

Re: TypeScript 6.0 RC

#4

Post by tmaly » Fri, Mar 06, 2026, 9:21 PM UTC

I had no idea they were using Go to write a compiler.

Re: TypeScript 6.0 RC

#5

Post by alembic_fumes » Fri, Mar 06, 2026, 9:31 PM UTC

> strict is now true by default

I would still have a full head of hair if this had been the case since the beginning. Nonetheless I am glad that we got here in the end.

Re: TypeScript 6.0 RC

#6

Post by steve_adams_86 » Fri, Mar 06, 2026, 9:40 PM UTC

alembic_fumes wrote: post #5

> strict is now true by default I would still have a full head of hair if this had been the case since the beginning. Nonetheless I am glad that we got here in the end.

I came to point that out too. What an awesome development. I think this will have a meaningful impact on the general quality of TS projects over the coming years.

Re: TypeScript 6.0 RC

#7

Post by tanepiper » Fri, Mar 06, 2026, 10:18 PM UTC

pscanf wrote: post #3

As a user, I'm of course very excited about v7. As a developer of an app that _integrates_ TypeScript, however, I feel a bit uneasy seeing the API feature still marked as "not ready" on the roadmap. On the other hand, I can understand leaving it as the last thing to do, after the foundation has set. Also, the TypeScript team has really done an amazing job all these years with backward compatibility, so that is extrem…

FWIW I tried it with the VSCode preview in two monorepos we have - one frontend and one backend GraphQL servers with complex types - absolutely no issues (except one breaking change in tsconfig with baseUrl being removed) and fast compile times.

Re: TypeScript 6.0 RC

#8

Post by 369548684892826 » Fri, Mar 06, 2026, 10:21 PM UTC

alembic_fumes wrote: post #5

> strict is now true by default I would still have a full head of hair if this had been the case since the beginning. Nonetheless I am glad that we got here in the end.

Just use deno

Re: TypeScript 6.0 RC

#9

Post by silverstream » Fri, Mar 06, 2026, 10:30 PM UTC

tanepiper wrote: post #7

pscanf wrote: post #3

As a user, I'm of course very excited about v7. As a developer of an app that _integrates_ TypeScript, however, I feel a bit uneasy seeing the API feature still marked as "not ready" on the roadmap. On the other hand, I can understand leaving it as the last thing to do, after the foundation has set. Also, the TypeScript team has really done an amazing job all these years with backward compatibility, so that is extrem…

FWIW I tried it with the VSCode preview in two monorepos we have - one frontend and one backend GraphQL servers with complex types - absolutely no issues (except one breaking change in tsconfig with baseUrl being removed) and fast compile times.

Same experience here with a pnpm workspace monorepo. The baseUrl removal was the only real friction — we were using it as a path alias root, had to move everything to subpath imports.

  The moduleResolution: node deprecation is the one I'd flag for anyone not paying attention yet. Switching to nodenext forced us to add .js extensions to all      
  relative imports, which was a bigger migration than expected.

  Compilation speed improvement is real though. Noticeably faster on incremental builds.

Re: TypeScript 6.0 RC

#10

Post by [deleted] » Fri, Mar 06, 2026, 11:13 PM UTC

steve_adams_86 wrote: post #6

alembic_fumes wrote: post #5

> strict is now true by default I would still have a full head of hair if this had been the case since the beginning. Nonetheless I am glad that we got here in the end.

I came to point that out too. What an awesome development. I think this will have a meaningful impact on the general quality of TS projects over the coming years.

[deleted]