Singleton Pattern

Singleton_Pattern.js

var Singleton = (function () {
  var instantiated;

  function init() {

    // singleton 

    return {
      publicMethod: function () {
        // Do some Work
      },

      publicProperty: "MyProperty"
    };
  }

  return {
    getInstance: function () {
      if ( !instantiated ) {
        instantiated = init();
      }
      return instantiated;
    }
  };
})();

// calling public methods is then as easy as:
Singleton.getInstance().publicMethod();