Push messagesThe Push API subscribes to and receives server-initiated messages. Subscribers receive pushed messages in the background, even after periods inactive or offline.widely2023-03-272025-09-27https://w3c.github.io/push-api/push-apihttps://developer.mozilla.org/docs/Web/API/PushEventapi.Permissions.permission_pushapi.PushEventapi.PushEvent.PushEventapi.PushEvent.dataapi.PushManagerapi.PushManager.getSubscriptionapi.PushManager.permissionStateapi.PushManager.subscribeapi.PushManager.supportedContentEncodings_staticapi.PushMessageDataapi.PushMessageData.arrayBufferapi.PushMessageData.blobapi.PushMessageData.bytesapi.PushMessageData.jsonapi.PushMessageData.textapi.PushSubscriptionapi.PushSubscription.endpointapi.PushSubscription.expirationTimeapi.PushSubscription.getKeyapi.PushSubscription.optionsapi.PushSubscription.toJSONapi.PushSubscription.unsubscribeapi.PushSubscriptionChangeEventapi.PushSubscriptionChangeEvent.PushSubscriptionChangeEventapi.PushSubscriptionChangeEvent.newSubscriptionapi.PushSubscriptionChangeEvent.oldSubscriptionapi.PushSubscriptionOptionsapi.PushSubscriptionOptions.applicationServerKeyapi.PushSubscriptionOptions.userVisibleOnlyapi.ServiceWorkerGlobalScope.push_eventapi.ServiceWorkerGlobalScope.pushsubscriptionchange_eventapi.ServiceWorkerRegistrationapi.ServiceWorkerRegistration.pushManagerhttps://nowyoucanuse.com/features--push.html