this.onClickScreen //1
this.renderAverage();//2

둘다 클래스의 매소드를 부르는 건데&nbsp;
이벤트 함수는 부를때 ()를 왜 안부르나요?

<span style="box-sizing: border-box; color: #24292e; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; font-size: 16px; background-color: #fdfdfd;">알아서 ()가 붙는다면&nbsp;<span style="box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; font-size: 16px; background-color: #ffffff; color: #212529;">this.renderAverage() 에서 소괄호 빼고&nbsp;<span style="box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; font-size: 16px; background-color: #ffffff; color: #212529;">this.renderAverage 이렇게 작성해도 되는건가요? 근데 이렇게 하면&nbsp;<span style="box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; font-size: 16px; background-color: #fdfdfd; color: #212529;">Functions are not valid as a React child<span style="box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; font-size: 16px; background-color: #ffffff; color: #212529;"> 에러가 나더라구요

모든 이벤트는 실행될 때 알아서 ()가 붙습니다.

Inflearn Community Q&A

새삼스럽게 질문, class method를 이벤트로 부를때는 왜 () 이렇게 안써주나요?