a.js

"use strict";
var __es6_module__ = {}, __imports__ = [];

module.exports = {
  __es6_module__: __es6_module__
};

__imports__['./b'] = require('./b');
__imports__['./b'] = __imports__['./b'].__es6_module__ || __imports__['./b'];


__es6_module__["default"] = function even(n) {
  return n === 0 || __imports__['./b'].default(n - 1);
}

b.js

"use strict";
var __es6_module__ = {}, __imports__ = [];

module.exports = {
  __es6_module__: __es6_module__
};

__imports__['./a'] = require('./a');
__imports__['./a'] = __imports__['./a'].__es6_module__ || __imports__['./a'];


__es6_module__["default"] = function odd(n) {
  return n !== 0 && __imports__['./a'].default(n - 1);
}

c.js

var even = require('./a').__es6_module__.default;
var odd = require('./b').__es6_module__.default;

console.log(odd(5));  // true
console.log(odd(6));  // false

console.log(even(5)); // false
console.log(even(6)); // true