JavaScript

Optional Chaining

const car1 = {
  brand: "Toyota",
  engine: {
    start: () => console.log("Engine started"),
  }
};

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

car1.engine.start();
car2.engine.start();


const car1 = {
  brand: "Toyota",
  engine: {
    start: () => console.log("Engine started"),
  }
};

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

car1.engine.start();
car2.engine.start?.();
