Handle Notification in background of PWA app to open the PWA app again

How to open the PWA app on click of notification in the background

Im interesting to but no succes at all: on service-worker i add:

self.addEventListener(‘notificationclick’, function(event) {
let url = ‘https://myapp.com/’;
clients.matchAll({includeUncontrolled: true,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);

when i click nothing happens, i hope someone help