{"json_modified": "2016-03-28T08:43:57.912023", "uuid": "f4afc351-c8ac-456a-9c08-31fc14025773", "title": "ServiceWorkerContainer.onmessage", "url": "/en-US/docs/Web/API/ServiceWorkerContainer/onmessage", "tags": ["API", "ServiceWorker", "Reference", "Property", "Experimental", "R\u00e9f\u00e9rence", "Exp\u00e9rimental", "ServiceWorkerContainer", "Service Workers"], "translations": [], "modified": "2016-03-17T13:45:25", "label": "ServiceWorkerContainer.onmessage", "localization_tags": [], "locale": "en-US", "id": 145455, "last_edit": "2016-03-17T13:45:22", "summary": "The <strong><code>onmessage</code></strong> property of the <a href=\"/en-US/docs/Web/API/ServiceWorkerContainer\" title=\"The ServiceWorkerContainer interface of the ServiceWorker API provides an object representing the service worker as an overall unit in the network ecosystem, including facilities to register, unregister and update service workers, and access the state of service workers and their registrations.\"><code>ServiceWorkerContainer</code></a> interface is an event handler fired whenever a <code><a href=\"/en-US/docs/Web/Events/message\" title=\"/en-US/docs/Web/Events/message\">message</a></code> event occurs \u2014 when incoming messages are received to the <a href=\"/en-US/docs/Web/API/ServiceWorkerContainer\" title=\"The ServiceWorkerContainer interface of the ServiceWorker API provides an object representing the service worker as an overall unit in the network ecosystem, including facilities to register, unregister and update service workers, and access the state of service workers and their registrations.\"><code>ServiceWorkerContainer</code></a> object (e.g., via a <a href=\"/en-US/docs/Web/API/MessagePort/postMessage\" title=\"The postMessage() method of the MessagePort interface sends a message from the port, and optionally, transfers ownership of objects to other browsing contexts.\"><code>MessagePort.postMessage()</code></a> call).", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}], "slug": "Web/API/ServiceWorkerContainer/onmessage", "review_tags": ["technical"]}