Uncaught TypeError: checkBox.addEventListener is not a function. How fix this?

I have the code:

 <script>
        var elements = document.getElementsByName("customSwitch1");

        for (let i = 0; i < elements.length; i++) {
            var checkBox = elements[i].getAttribute('id');
            checkBox.addEventListener('click', function (e) {
                $('#form1').submit();
            });
        }
    </script>

Why this code call the error Uncaught TypeError: checkBox.addEventListener is not a function