Example of "classical" style JavaScript

classical1.js

module.exports = Foo;  // just one line to get all of this code.  
                       // Now how much would you pay?

/** constructor capital first letter to remind callers**/
function Foo(args) {

  if (!this instanceof Foo)  // but callers do screw up...
     return new Foo(args)    // or, if you wish, throw something

  this.useSoap = args.useSoap ;  // define instance vars here
  this.bar = {};
}

// equivalent to static constants (ideally should be final)
Foo.CONSTANT1 = 'specialConstant';

// static function, no "this" 
Foo.function1 = function(args) {
   ...
}

// method, "this" is almost certainly a Foo
Foo.prototype.method1 = function(args) {
  ...
};

// "hide" private method by convention of leading underscore
Foo.prototype._privatemethod1 = function(args) {
  ...
};