document.getElementById('top-banner-btn').addEventListener('click', function () {
try {
const msg = JSON.stringify({
"toDataLayer": {
"event": "custom.event.message",
"messageData.eventName": "button_click",
"messageData.eventTargetLabel": "Subscribe button",
"messageData.eventTargetLocation": "Piano top banner"
}
});
window.parent.postMessage(msg, 'https://www.nationalobserver.com');
} catch (e) {
window.console && window.console.log(e);
}
});