Optional Chaining

const adventurer = {
  name: 'Alice',
  cat: {
    name: 'Dinah'
  }
};

// Before Optional Chaining
if(adventurer && adventurer.cat){
 console.log(adventurer.cat.name);
 //'Dinah'
}

// After Optional Chaining
console.log(adventurer.cat?.name);
//'Dinah'