Supporting TypeScript natively on Nashorn

Art Fiedler artfiedler at
Fri Aug 10 13:17:39 UTC 2018

I have a project that uses nashorn to compile typescript and run in java, what's wrong with that? Doesn't it become native after loading it if I remember correctly?

From: Jim Laskey
Sent: Thursday, August 9, 2018 7:48 AM
To: Erko Knoll
Cc: nashorn-dev at
Subject: Re: Supporting TypeScript natively on Nashorn

The Nashorn team has no plans but you might check the GraalVM project to see what they might have in this area.


— Jim

> On Aug 9, 2018, at 7:01 AM, Erko Knoll <erko.knoll at> wrote:
> Hi,
> Great job with Nashorn, I really love it. However, based on the blog post
> of
> I would like to ask if there are any plans to natively support TypeScript
> in the future.
> The reason I'm asking is because I built a product that allows to do
> TypeScript scripting for JVM. But currently I'm transpiling TypeScript down
> to ES5 so Nashorn would be able to ingest it. For obvious performance gain
> reasons it would be really cool if type information could be retained from
> TypeScript side.
> If you are interested how writing TypeScript currently looks like for JVM,
> then you can visit the website: Though it is
> built for JIRA that is written in Java, then the same approach could be
> applied for any JVM application.
> Hoping to hear back,
> Erko

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