JAVASCRIPT

checkbox event listener

checkbox = document.getElementById('conducted');

checkbox.addEventListener('change', e => {

    if(e.target.checked){
        //do something
    }

});

checkbox event listeners

const checkbox = document.querySelector("input[name=checkbox]");

checkbox.addEventListener("change", (e) => {
  if (e.target.checked) {
    console.log("Checkbox is checked..");
  } else {
    console.log("Checkbox is not checked..");
  }
});