Example of configuration injection in node.js

config.json

{
   "value": "config value here"
}

main.js

var submodule = require('submodule').config(require('config.json'));

submodule.frobnicate();

submodule.js

var configuration = {};

module.exports = {
   config: function(config) {
       configuration = config;
       return module.exports;
   },
   frobnicate: function() {
       console.log("Config value is ", configuration.value)
   }
}