Hello Ben Coe here 👋, I maintain the nyc and istanbuljs test coverage tools.

A good chunk of the bug reports opened on these repos relate to TypeScript parsing:

https://github.com/istanbuljs/nyc/issues?q=is%3Aissue+is%3Aopen+label%3ATypeScript

Given that:

1. TypeScript is wildly popular, and continues to become more popular.
2. folks want to collect coverage information as part of the testing cycle for their TypeScript projects.

I would love to work with you to add better TypeScript support to Istanbul.

Istanbul uses babel behind the scenes for instrumentation, I think that babel-preset-typescript could potentially be a good starting point for pulling this off -- perhaps we could simply swap out the underlying JavaScript parser for a TypeScript parser based on a flag?

Is there anyone on your end who might be interested in this joint project with the Istanbul folks?

flagging a couple folks on the Babel project too, in case they're at all interested in giving their two cents:

CC: @hzoo, @loganfsmyth.