You probably know about Function.prototype.bind method in JavaScript. It returns a copy of the original function but this function will always be called in the specified context. The problem is that you can't rebind another context any more. var func = function () { return this.prop; }; var obj1 = {prop: 1}, obj2 = {prop: 2}; func = func.bind(obj1); func(); // Will produce 1 func = func.bind(obj2); func(); // Will also produce 1 :( Your task is override the native Function.prototype.bind method by a new one that will allow you to rebind context multiple times. In this kata you don't need to worry about currying, testing function will never get params. Node version 8.12

Function.prototype.bind = function (context) {
  let fn = this;
  return function(){
    return fn.apply(context, arguments);
  }
}