Why is "export default var a = 1;" invalid syntax?

Kevin Smith zenparsing at gmail.com
Fri Dec 12 20:44:58 PST 2014


>
> From https://people.mozilla.org/~jorendorff/es6-draft.html#sec-exports,
> it seems that "export default var a = 1;” is not valid in es6. I wonder why
> that’s the case. You can already do "var a = 1;export default a;”. Why not
> make "export default var a = 1;” valid?
>

Exporting a variable declaration list as "default" wouldn't make sense:
 for one, the list can have more than one element:

    export default var a, b, c;  // Non-sensical
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