Handy function to turning a nested object into a list of string based constants.

utils.js

"use strict";

module.exports = {
  constantify: function constantify(app, obj, prevK) {
    for (var k in obj) {
      var nextK = prevK ? prevK + '.' + k : app + '.' + k;
      if (obj[k] === null) obj[k] = nextK;
      else constantify(app, obj[k], nextK);
    }
    return obj;
  }
};

Usage:

// MyAppConstants.js

module.exports = constantify('MyApp', {
  ActionTypes: {
    MyModel: {
      UPDATE: null
    }
  }
});