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JavaScript 연습

1. this

  • this는 함수가 어떻게 호출되는지에 따라 동적으로 결정
  • this의 주요 목적은 작성된 코드를 여러 목적으로 재사용하기 위해 존재하지만 호출되는 방식에 따라 동적으로 결정되어 잘못된 코드를 작성할 수 있음
  • 전역에서 사용할 수도 있고 함수 안에서 사용할 수 있지만 함수는 객체 안에 메소드로 정의될 수 있고, 생성자 함수로 사용될 수 있고, 특정 로직을 계산하여 값을 반환하는 목적으로도 사용
  • 힘수가 다양하게 사용되기 대문에 this도 각 함수별로 다르게 해석. 화삺 함수에서으 this도 다르게 해석되고 class 안에서 사용되는 this는 생성자 함수와 동일

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