https://github.com/esperantojs/esperanto/wiki/Cycles in ES5 CommonJS/Node.js

app.js

"use strict";

var createObject = require('./createObject');

var contrivedExample = createObject( 42 );

createChildren.js

"use strict";

module.exports = createChildren;

var createObject = require('./createObject');

function createChildren ( i ) {
  var children = [];

  while ( i-- ) {
    children[i] = createObject( 0 );
  }

  return children;
}

createObject.js

"use strict";

module.exports = createObject;

var createChildren = require('./createChildren');

function createObject( numChildren ) {
  return {
    children: createChildren( numChildren )
  };
}