Event handler for toggle (for Medium post)

index.html

<script type="text/javascript">
    var _selector = document.querySelector('input[name=myCheckbox]');
    _selector.addEventListener('change', function(event) {
        var message = (_selector.checked) ? "Toggle Switch is on" : "Toggle Switch is off";

        if (messageHandler) {
            messageHandler.postMessage(message);
        }
        });
</script>