agjs

function foo(role, level) {
  console.log(`Your role is ${role} and your level is ${level}.`);
  console.log(this);
}

foo();

var person = {
  name: 'Julie'
};

agjs

// Fluent api

function Chai() {}

Chai.prototype.expect = function(number) {
  this.number = number;
  return this;
};

Chai.prototype.increment = function() {