체크박스에 이벤트 달기

https://developer.mozilla.org/ko/docs/Web/API/GlobalEventHandlers/onchange

        addEvents();

        function addEvents() {
            var checkBoxes = document.querySelectorAll('#taskList input[type="checkbox"]');
            
            //console.log(checkBoxes)
            
            for (var index in checkBoxes) {
                checkBoxes[index].onchange = updateJSON;
            }
            
        }

        function updateJSON() {
            var key = event.target.value;
            console.log(key, event.target.checked)
            dataJSON.할일들[key] = event.target.checked
        }