module.js
var x = 10;
var y = 20;
export {x, y};
export default x;
main.js
import {x, y} from 'module';
import z from 'module'; // will import default
console.log(x); // 10
console.log(y); // 20
console.log(z); // 10
imports/startup/client/index.js
export default name = "John Doe";
main.js
import item from 'imports/startup/client/' // will look for index.js
console.log(item); // "john doe"