function myCar() {
this.fuel = 0;
this.reFuel = function() {
console.log(this)
setTimeout(function(){
console.log(this)
this.fuel += 100
console.log('Refueld! current fuel is ' + this.fuel)
}, 1000)
}
}
const Bugatti = new myCar() Bugatti.reFuel(); //Refueld! current fuel is NaN