JavaScript: Moving to ES2015

Modules

Modules are used to mimic classes and focus on public and private access to variables and functions. Modules help in reducing the global scope pollution. Effective use of modules can reduce name collisions across a large code base. A typical format that this pattern takes is as follows:

Var moduleName=function() {
  //private state
  //private functions
  return {
     //public state
     //public variables
  }
}

There are two requirements to implement this pattern in the preceding format:

• There must be an outer enclosing function that needs to be executed at least once.
• This enclosing function must return at least one inner function. This is necessary to create a closure over the private state—without this, you can't access the private state at all.

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