This is the 3rd post in a series on techniques, strategies and patterns for writing JavaScript code.The Prototype Pattern shown in an earlier post works well and is quite efficient, but it’s not the only game in town. a helper method that is specifically for the module it's enclosed in). … - Selection from Learning JavaScript Design Patterns [Book] JavaScript Module pattern provides a way to wrap public, private methods (and variable) into a single entity and exposing only the public members to the world outside of module. One of the most widely used design patterns in JavaScript is the module pattern. Object literal notation, which we also cover in the Module pattern section, can be thought of as an object containing a collection of key-value pairs with a colon separating each pair of keys and values, where keys can also represent new namespaces. The module pattern makes use of one of the nicer features of JavaScript – closures – in order to give you some control of the privacy of your methods so that third party applications cannot access private data or overwrite it. In this article, I’ll review the basics and cover some truly remarkable advanced topics, including one which I think is original. There is also a type of export called the default export — this is designed to make it easy to have a default function provided by a module, and also helps JavaScript modules to interoperate with existing CommonJS and AMD module systems (as explained nicely in ES6 In Depth: Modules by Jason Orendorff; search for "Default exports"). The Module Pattern is widely used because it provides structure and helps organize your code into self-contained de-coupled pieces of code. Ask Question Asked 8 years, 4 months ago. It’s generally well understood, but there are a number of advanced uses that have not gotten a lot of attention. The differences between the revealing module pattern and the other variants of the module pattern are primarily in how public members are referenced. The Module Pattern Modules are an integral piece of any robust application’s architecture and typically help in keeping the units of code for a project both cleanly separated and organized. As a result, the revealing module pattern is much easier to use and modify; however, it may prove fragile in certain scenarios, like using RMP objects as prototypes in an inheritance chain. ... Get Learning JavaScript Design Patterns now with O’Reilly online learning. There are many great patterns described in JavaScript Patterns by Stoyan Stefanov but my preference today is to use the Module Pattern. Using the JavaScript Revealing Module Pattern. In a previous post I discussed , JavaScript Arrays, and made use of Fibonacci.js module to return a Fibonacci sequence of numbers. I use the module pattern only where I need to keep "private" variables and functions in closures (e.g. The module pattern is a common JavaScript coding pattern. Module Pattern – the solution, organize your code. The Fibonacci.js is an example of the JavaScript Module Pattern.In this post I will discuss the JavaScript Module pattern, in more depth and provide reasons why it is the one of the most important JavaScript Design Pattern you should learn to improve the … In JavaScript, the Module pattern is used to further emulate the concept of classes in such a way that we're able to include both public/private methods and variables inside a single object, thus shielding particular parts from the global scope. Javascript module pattern, nested functions, and sub modules.