service worker self.clients
addEventListener('notificationclick', event => {
event.waitUntil(async function() {
const allClients = await clients.matchAll({
includeUncontrolled: true
});
let chatClient;
// Let's see if we already have a chat window open:
for (const client of allClients) {
const url = new URL(client.url);
if (url.pathname == '/chat/') {
// Excellent, let's use it!
client.focus();
chatClient = client;
break;
}
}
// If we didn't find an existing chat window,
// open a new one:
if (!chatClient) {
chatClient = await clients.openWindow('/chat/');
}
// Message the client:
chatClient.postMessage("New chat messages!");
}());
});