publiclab/plots2

self.onnotificationclick = function (event) {
  // return clients.openWindow(event.notification.data);
    // This looks to see if the current is already open and
    // focuses if it is
    event.waitUntil(
        clients.matchAll({
            type: "window"
        }).then(function(clientList) {
                for (let i = 0; i < clientList.length; i++) {
                    let client = clientList[i];
                    if (client.url == '/' && 'focus' in client)
                        return client.focus();
                }
                if (clients.openWindow) {
                    return clients.openWindow(event.notification.data);
                }
            })
    );
};