{"json_modified": "2016-03-28T08:48:48.250700", "uuid": "5d02967c-92f1-4ff9-b4f1-692a2fd79e7d", "title": "ServiceWorkerMessageEvent.lastEventId", "url": "/en-US/docs/Web/API/ServiceWorkerMessageEvent/lastEventId", "tags": ["API", "Reference", "Experimental", "Property", "ServiceWorkerMessageEvent", "lastEventID", "Service Workers"], "translations": [], "modified": "2016-03-17T13:58:27", "label": "ServiceWorkerMessageEvent.lastEventId", "localization_tags": [], "locale": "en-US", "id": 168863, "last_edit": "2016-03-17T13:58:24", "summary": "The <strong><code>lastEventID</code></strong>\u00a0read-only property of the <a href=\"/en-US/docs/Web/API/ServiceWorkerMessageEvent\" title=\"The ServiceWorkerMessageEvent interface of the ServiceWorker API contains information about an event sent to a ServiceWorkerContainer&#xA0;target. This extends the default message event to allow setting a ServiceWorker object as the source of a message. The event object is accessed via the handler function of a message event, when fired by a message received from a service worker.\"><code>ServiceWorkerMessageEvent</code></a> interface represents, in\u00a0<a href=\"https://developer.mozilla.org/en-US/docs/Web/API/en-US/docs/Server-sent_events/Using_server-sent_events\">server-sent events</a>, the last event ID of the event source.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Value", "title": "Value"}, {"id": "Examples", "title": "Examples"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "See_also", "title": "See also"}], "slug": "Web/API/ServiceWorkerMessageEvent/lastEventId", "review_tags": []}