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[JS30] -10) Hold Shift Check Checkboxes
KeyboardEvent.shiftKey Shiftkey를 눌렀는지 안 눌렀는지 여부를 판별하기 위해 사용할 수 있는 메소드이다. 처음에 click이벤트와 shift keydown이벤트 두 개를 만들고 있었는데, 중첩해야 하는 부분이 있어 고민했었다. 이 API를 사용하면 정말 간단하게 구현할 수 있다. forEach로 모든 체크박스 element를 순회하면서 클릭했던 체크박스를 기준으로 체크해야 하는 체크박스를 toBeChecked변수로 표시하고, 만약 toBeChecked가 true라면 곧바로 checkd = true로 체크 표시한다. shiftkey를 누른 상태에서 체크박스를 클릭하면 toBeChecked가 false가 된다. > 강의 자료에서는 checkbox를 모두 선택한 뒤 클릭 이벤트를 등록한 다음, this값을 주었다. Reference https://developer.mozilla.org/en-US/docs/Web/API/Keyboard
2021년 10월 25일
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