[tsigel]

HJ90,

var Some = function () {};
Some.prototype.method1 = function () {
   console.log(1);
   return this;
};

Some.prototype.method2 = function () {
   console.log(2);
   return this;
};

Some.prototype.method3 = function () {
   console.log(3);
   return this;
};

var some = new Some();
some.method1().method2().method3().method1().method2().method3();//...