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

Glen Huang curvedmark at gmail.com
Mon Dec 15 03:26:08 PST 2014


What about this:

export default var a, b, c;

is equivalent to 

var a;
export default a;

export var b, c;


> On Dec 13, 2014, at 12:44 PM, Kevin Smith <zenparsing at gmail.com> wrote:
> 
> From https://people.mozilla.org/~jorendorff/es6-draft.html#sec-exports <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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