templatePattern.js

function ObjFactory(initialPrivateVariableForAll) {
  var privateVariableForAll = initialPrivateVariableForAll;
  return function ObjConstructor(initialPrivateVariableForInstance) {
    var privateVariableForInstance = initialPrivateVariableForInstance;
    return {
      getInitialPrivateVariableForAll: function() {
        return initialPrivateVariableForAll;
      },

      getInitialPrivateVariableForInstance: function() {
        return initialPrivateVariableForInstance;
      },

      getPrivateVariableForAll: function() {
        return privateVariableForAll;
      },

      getPrivateVariableForInstance: function() {
        return privateVariableForInstance;
      },

      setPrivateVariableForInstance: function(value) {
        privateVariableForInstance = value;
      },

      setPrivateVariableForAll: function(value) {
        privateVariableForAll = value;
      },
    };
  };
}

var Obj = new ObjFactory('initialPrivateVariableForAll');

var o = new Obj('initialPrivateVariableForInstance1');
var b = new Obj('initialPrivateVariableForInstance2');

console.log(o.getPrivateVariableForAll());
console.log(o.getPrivateVariableForInstance());

console.log(b.getPrivateVariableForAll());
console.log(b.getPrivateVariableForInstance());

console.log('++++++++++++++++++++++++++++++++++++++++++++++++++++++++');

b.setPrivateVariableForInstance('changedPrivateVariableForInstance2');
b.setPrivateVariableForAll('changedPrivateVariableForAll');

console.log(o.getPrivateVariableForAll());
console.log(o.getPrivateVariableForInstance());

console.log(b.getPrivateVariableForAll());
console.log(b.getPrivateVariableForInstance());

console.log('++++++++++++++++++++++initial++++++++++++++++++++++++++++++++++');

console.log(o.getInitialPrivateVariableForAll());
console.log(o.getInitialPrivateVariableForInstance());

console.log(b.getInitialPrivateVariableForAll());
console.log(b.getInitialPrivateVariableForInstance());