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.

Different options for implementing modules in JavaScripts are:

1. The Module pattern
2. Object literal notation
3. AMD modules
4. CommonJS modules
5. ECMAScript Harmony modules

Advantages of Module Patterns

• Clean
• Supports private data

Disadvantages of Module Patterns

• As we access both public and private members differently, when we wish to change visibility, we actually have to make changes to each place the member was used.
• Cannot access private members in methods that are added to the object at a later point.
• Inability to create automated unit tests for private members.
• Additional complexity when bugs require hotfixes.