chainingFunctions.js

// http://stackoverflow.com/questions/12064040/javascript-what-is-the-best-method-when-creating-chainable-functions - Olegas

function test() {
   // when test() is called as a regular function
   // it's `this` will be `undefined` (in strict mode) or will refer to a global object
   // when test() is called with `new` operator
   // it's `this` will be an instance of `test` object
   if(!(this instanceof test)) {
      // create a new object
      return new test();
   }
   else {
      // this is a `new object` creation              
      console.log('new Test created');
   }
}

// declare functions which will be accessible on test object
test.prototype.someFunc = function() {
    console.log('someFunc');
    return this;
};

test.prototype.someFunc2 = function() {
    console.log('someFunc2');
    return this;
};

// declare a `chaining` function - will create a new `test` object
test.prototype.test = function() {
    return new test(); // new instance will be created
};

// With this code you are now able to run the following code

test().someFunc().someFunc2().test().someFunc().someFunc().test().test()

//The following string will be written at the console
//
//new Test created
//someFunc
//someFunc2
//new Test created
//someFunc
//someFunc
//new Test created
//new Test created