Written Proposal for "package" Keyword for ES20XX Imports

T.J. Crowder tj.crowder at farsightsoftware.com
Wed Feb 22 18:00:10 UTC 2017

On Wed, Feb 22, 2017 at 5:50 PM, Isiah Meadows <isiahmeadows at gmail.com>

> I'll point out that Babel doesn't follow spec perfectly because it can't
> transpile the bindings correctly in the case of synchronously executed code
> with circular dependencies. That's a CommonJS limitation that Babel can't
> work around any more than it already does.
I was wondering about that. Greg, re your example where you said:

In the latest Babel the above code fails to run on the first line of app.js
> (at the time it attempts to execute `_inherits(B, _A);`.). This is because
> "A" is undefined in module b.js due to the circular dependency. In this
> case Babel basically executed code in the incorrect order for this to be
> able to work.

What does the *spec* say should happen in that situation? (You've clearly
been into it in some detail.) As opposed to what Babel does, since of
course Babel while excellent is working with some limitations...?

-- T.J. Crowder
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