Returns the string ID of the notification button the user clicked. This value returns an empty string if the user clicked the notification somewhere other than an action button, or the notification does not have a button.
Extends the lifetime of the event. Tells the browser that work is ongoing.
Example
js
self.addEventListener("notificationclick",(event)=>{
console.log(`On notification click: ${event.notification.tag}`);
event.notification.close();// This looks to see if the current is already open and// focuses if it is
event.waitUntil(
clients
.matchAll({type:"window",}).then((clientList)=>{for(const client of clientList){if(client.url ==="/"&&"focus"in client)return client.focus();}if(clients.openWindow)return clients.openWindow("/");}),);});