Chrome push notification – how to open URL adress after click?

I am guessing you are in a Service Worker context, because that’s where Push Notifications are received. So you have the self object to add a event listener to, that will react to a click on the notification.

(Place this code in your sw.js file, which is your Service Worker script.)

self.addEventListener('notificationclick', function(event) {
    let url="https://example.com/some-path/";
    event.notification.close(); // Android needs explicit close.
    event.waitUntil(
        clients.matchAll({type: 'window'}).then( windowClients => {
            // Check if there is already a window/tab open with the target URL
            for (var i = 0; i < windowClients.length; i++) {
                var client = windowClients[i];
                // If so, just focus it.
                if (client.url === url && 'focus' in client) {
                    return client.focus();
                }
            }
            // If not, then open the target URL in a new window/tab.
            if (clients.openWindow) {
                return clients.openWindow(url);
            }
        })
    );
});