Get the value of checked checkbox?
问题 So I've got code that looks like this: <input class="messageCheckbox" type="checkbox" value="3" name="mailId[]"> <input class="messageCheckbox" type="checkbox" value="1" name="mailId[]"> I just need Javascript to get the value of whatever checkbox is currently checked. EDIT : To add, there will only be ONE checked box. 回答1: For modern browsers : var checkedValue = document.querySelector('.messageCheckbox:checked').value; By using jQuery : var checkedValue = $('.messageCheckbox:checked').val()