Is it possible to export Arrow functions in ES6/7?

Is it possible to export Arrow functions in ES6/7?

Yes. export doesn't care about the value you want to export.

The export statement below gives a syntax error ... why?

You cannot have a default export and give it a name ("default" is already the name of the export).

Either do

export default () => console.log("say hello");

or

const hello = () => console.log("say hello");
export default hello;

Try this

export default () => console.log("say hello");

or

export const hello = () => console.log("say hello")

If you don't want a default export, you can simply export a named function with this syntax:

export const yourFunctionName = () => console.log("say hello");