JavaScript 옵셔널 체이닝

개요

자바스크립트 Optional chaining (?.)

JavaScript 옵셔널 체이닝

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

const dogName = adventurer.dog?.name;
console.log(dogName); // Expected output: undefined
console.log(adventurer.someNonExistentMethod?.()); // Expected output: undefined

같이 보기

• JavaScript 널리시 합체 연산자
• Uncaught TypeError: Cannot read properties of undefined (reading 'name')

참고

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining