JavaScript

Optional Chaining

const car1 = {
  brand: "Toyota",
  engine: {
    "turn-off": () => console.log("Engine turned off"),
  }
};

const car2 = {
  brand: "Honda",
};

car1.engine["turn-off"]();
car2.engine["turn-off"]();


const car1 = {
  brand: "Toyota",
  engine: {
    "turn-off": () => console.log("Engine turned off"),
  }
};

const car2 = {
  brand: "Honda",
};

car1.engine["turn-off"]();
car2.engine?.["turn-off"]();
