Esbuild: Supported TypeScript version and changelog?

[elektronik2k5]

Hello and thanks for creating this awesome project! :smiley:

I searched the docs and issues but found no relevant information for a simple question: which version of TypeScript is currently supported? The readme has an overview of JS features, but unlike JS (referring to TC39 stages 3-4), TS evolves faster with several releases a year. A good example is TypeScript's previous release, [email protected], which introduced new syntax.

Related: I didn't find a changelog or release notes. Without those it is very difficult to consider esbuild for non toy projects.

Specifically, esbuild was suggested for use in deno, but I can't evaluate the feasibility of using esbuild without knowing what's currently supported (specifically in TS) and what's the project roadmap.

[evanw]

which version of TypeScript is currently supported?

That's a good question. I should add a compatibility table for TypeScript in addition to JavaScript. Just like esbuild doesn't support a single version of JavaScript, esbuild also doesn't support a single version of TypeScript. It supports some features from later versions without supporting some features from earlier versions.

For example, it supports the new type-only import/export syntax you linked to but it doesn't yet support private fields or experimental decorators. I want to do a push to implement those at some point but right now I'm focusing on a rewrite of the core bundler to support tree shaking and code splitting.

I didn't find a changelog or release notes. Without those it is very difficult to consider esbuild for non toy projects.

I should get a changelog together. That said, keep in mind that I'm not aware of anyone using this in production yet, so it may still be difficult to consider esbuild for non-toy projects even with a changelog.

[evanw]

I just got both of those started, and they can be improved over time. So I consider this issue fixed.

FWIW the only TypeScript-specific feature that I'm aware of that I don't support is experimental decorators. Most of the work to improve compatibility with TypeScript is just filling out support for newer JavaScript features.

[elektronik2k5]

Thank you for the detailed additions, they are clear and helpful. :smiley: