{"json_modified": "2016-03-28T08:35:23.145000", "uuid": "c1614647-9cae-4469-b8cb-abfe1ae933eb", "title": "L10n.once", "url": "/en-US/docs/Web/API/L10n.once", "tags": ["API", "l10n", "Reference", "Localization", "Firefox OS", "R\u00e9f\u00e9rence", "Method"], "translations": [], "modified": "2014-05-20T12:59:44", "label": "L10n.once", "localization_tags": [], "locale": "en-US", "id": 100535, "last_edit": "2014-05-20T12:59:43", "summary": "The <code>once</code> method is used to register a callback that will execute <strong>exactly once</strong>.\u00a0 If the <a href=\"/en-US/docs/Web/API/L10n\">L10n</a> context is ready when <code>L10n.once()</code> is called, the callback will be invoked immediately on the next tick of the event loop. If the <a href=\"/en-US/docs/Web/API/L10n\">L10n</a> context is not ready when <code>L10n.once()</code> is called (because the localization resources are still downloading), the callback will be invoked when the ready event of the L10n context fires.", "sections": [{"id": "Syntax", "title": "Syntax"}, {"id": "Parameters", "title": "Parameters"}, {"id": "Example", "title": "Example"}, {"id": "Specification", "title": "Specification"}, {"id": "See_also", "title": "See also"}, {"id": "Quick_Links", "title": null}], "slug": "Web/API/L10n.once", "review_tags": []}