Ambiguity with default exports and live bindings?

[Bergi]

/#!/JoePea schrieb:
> Is it true one of the following does not create a live binding?

Yes and no.

> ```js
> let A = 123
> export default A // not a live binding?
> ```

Actually it does create a live binding - to the variable with the name 
"*default*" which you cannot assign. But yes, the binding `A` is not 
exported.

> ```js
> let A = 123
> export {A as default} // live binding?
> ```

Yes.

> If so, this seems like large source for unexpected behavior when people
> create modules. I can imagine people easily overlooking the difference and
> expecting live bindings in both cases (this already happened to me).

I think people do in general not expect live bindings at all. For 
declarations and the purpose of initialisation order, yes, but not for 
mutable variables. You should export `const`s.
See also 
http://stackoverflow.com/q/35223111/1048572?what-is-the-difference-between-importing-a-function-expression-or-a-function-declaration-from-a-ES6-module.

Kind regards,
  Bergi