JavaScript Modularization Techniques CommonJS - Node.js
Example
CommonJS is a popular modularization pattern that's used in Node.js.
The CommonJS system is centered around a require() function that loads other modules and an exports property that lets modules export publicly accessible methods.
Here's an example of CommonJS, we'll load Lodash and Node.js' fs module:
// Load fs and lodash, we can use them anywhere inside the module
var fs = require("fs"),
_ = require("lodash");
var myPrivateFn = function(param) {
return "Here's what you said: " + param;
};
// Here we export a public `myMethod` that other modules can use
exports.myMethod = function(param) {
return myPrivateFn(param);
};
You can also export a function as the entire module using module.exports:
module.exports = function() {
return "Hello!";
};
