Support optional chaining.

[wxsms]

https://github.com/tc39/proposal-optional-chaining

[curran]

What would it take to make Buble work with optional chaining?

I'm interesting in not transforming it, but just allowing the syntax in code passed through Buble.

I see that support landed in Acorn for optional chaining https://github.com/acornjs/acorn/blob/master/acorn/CHANGELOG.md#730-2020-06-11

[curran]

I added a failing test for optional chaining here #274

[curran]

Added the same test here, where I did manage to upgrade acorn and acorn-jsx to the latest.

vizhub-core#4

    "acorn": "^8.4.1",
    "acorn-jsx": "^5.3.2",

The test still fails. I have no idea why.

I also added a test to acorn-jsx (just locally) and it passed, so it appears acorn-jsx and acorn really do support optional chaining.

[curran]

Still interested in this in 2022!

[Amanghvxh]

is this live or have not implemented yet? and can anyone tell me what can I use to compile my jsx to javascript? i used bable and it is not working