bind-polyfill

let name = {
  firstname: 'jyoti',
  lastname: 'arora'
}

var printFullName = function (city, state) {
  console.log(`${this.firstname} ${this.lastname} from ${city}, ${state}`);
}

var printMyName = printFullName.bind(name, 'MZN');

printMyName('UP');

Function.prototype.myBind = function(...args) {
  let obj = this;
  let params = args.slice(1);
  return function(...args2) {
    obj.apply(args[0], [...params, ...args2]);
  }
}


var printMyName2 = printFullName.myBind(name, 'MZN');

printMyName2('UP');