For default exports you should use:
import * as fs from 'fs';
Or in case the module has named exports:
import {fs} from 'fs';
Example:
//module1.js
export function function1() {
console.log('f1')
}
export function function2() {
console.log('f2')
}
export default function1;
And then:
import defaultExport, { function1, function2 } from './module1'
defaultExport(); // This calls function1
function1();
function2();
Additionally, you should use Webpack or something similar to be able to use ES6 import