{"componentChunkName":"component---src-templates-documentation-tsx","path":"/app/usage","result":{"data":{"mdx":{"body":"var _excluded = [\"components\"];\nfunction _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }\nfunction _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }\nfunction _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }\n/* @jsxRuntime classic */\n/* @jsx mdx */\n\nvar _frontmatter = {\n  \"title\": \"Core/App\",\n  \"description\": \"Functionality & examples of using the Core/App dependency with React Native Firebase.\",\n  \"icon\": \"//static.invertase.io/assets/social/firebase-logo.png\",\n  \"next\": \"/app/json-config\",\n  \"previous\": \"/storage/usage\"\n};\nvar layoutProps = {\n  _frontmatter: _frontmatter\n};\nvar MDXLayout = \"wrapper\";\nreturn function MDXContent(_ref) {\n  var components = _ref.components,\n    props = _objectWithoutProperties(_ref, _excluded);\n  return mdx(MDXLayout, _extends({}, layoutProps, props, {\n    components: components,\n    mdxType: \"MDXLayout\"\n  }), mdx(\"p\", null, \"The App module is available by default once you have installed the React Native Firebase library by following the\\n\", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/\"\n  }, \"Getting Started\"), \" documentation. The App module currently provides the following functionality:\"), mdx(\"ul\", null, mdx(\"li\", {\n    parentName: \"ul\"\n  }, \"Creating \", mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"#secondary-apps\"\n  }, \"Secondary Firebase App Instances\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, \"Exposing \", mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/app/utils\"\n  }, \"Utilities\"), \" to aid development.\")), mdx(\"h1\", {\n    \"id\": \"secondary-apps\"\n  }, \"Secondary Apps\"), mdx(\"p\", null, \"Unlike the Firebase Web SDK, there is no need to manually call the \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"https://firebase.google.com/docs/web/setup#add-sdks-initialize\"\n  }, mdx(\"inlineCode\", {\n    parentName: \"a\"\n  }, \"initializeApp\")), \"\\nmethod with your project credentials. The native Android & iOS SDKs automatically connect to your Firebase project using\\nthe credentials provided during the \", mdx(\"a\", {\n    parentName: \"p\",\n    \"href\": \"/\"\n  }, \"Getting Started\"), \" installation steps. The app module does however provide support\\nfor manually initializing secondary Firebase app instances.\"), mdx(\"p\", null, \"Currently, the native Firebase SDKs only provide functionality for creating secondary apps on the following services:\"), mdx(\"ul\", null, mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/app-check/usage\"\n  }, \"App Check\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/auth/usage\"\n  }, \"Authentication\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/database/usage\"\n  }, \"Realtime Database\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/firestore/usage\"\n  }, \"Cloud Firestore\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/functions/usage\"\n  }, \"Cloud Functions\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/storage/usage\"\n  }, \"Cloud Storage\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/ml/usage\"\n  }, \"ML\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/installations/usage\"\n  }, \"Installations\"), \".\"), mdx(\"li\", {\n    parentName: \"ul\"\n  }, mdx(\"a\", {\n    parentName: \"li\",\n    \"href\": \"/remote-config/usage\"\n  }, \"Remote Config\"), \".\")), mdx(\"h2\", {\n    \"id\": \"initializing-secondary-apps\"\n  }, \"Initializing secondary apps\"), mdx(\"p\", null, \"The module exposes an \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"initializeApp\"), \" method which accepts arguments containing the credentials and options for your secondary\\napps:\"), mdx(\"pre\", {\n    \"className\": \"language-js\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword module\"\n  }, \"import\"), \" firebase \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword module\"\n  }, \"from\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'@react-native-firebase/app'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Your secondary Firebase project credentials...\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" credentials \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token 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\"className\": \"token string\"\n  }, \"'SECONDARY_APP'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"await\"), \" firebase\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"initializeApp\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"credentials\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" config\", mdx(\"span\", {\n    parentName: \"code\",\n    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   parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n  projectId\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"''\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Your secondary Firebase project credentials for iOS...\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" iosCredentials \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" 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\"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" config \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  name\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \":\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'SECONDARY_APP'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"await\"), \" firebase\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"initializeApp\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), \"credentials\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" config\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\")), mdx(\"p\", null, \"Once created, you can confirm the app instance has been created by accessing the \", mdx(\"inlineCode\", {\n    parentName: \"p\"\n  }, \"apps\"), \" property on the module:\"), mdx(\"pre\", {\n    \"className\": \"language-js\"\n  }, mdx(\"code\", {\n    parentName: \"pre\",\n    \"className\": \"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"const\"), \" apps \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token operator\"\n  }, \"=\"), \" firebase\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"apps\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\napps\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"forEach\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token parameter\"\n  }, \"app\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token arrow operator\"\n  }, \"=>\"), \" \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"{\"), \"\\n  \", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token console class-name\"\n  }, \"console\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"log\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'App name: '\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \",\"), \" app\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token property-access\"\n  }, \"name\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"}\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \";\"), \"\\n\")), mdx(\"h2\", {\n    \"id\": \"switching-app-instance\"\n  }, \"Switching app instance\"), mdx(\"p\", null, \"You can switch app instances at any time whilst developing by calling the \", 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\"className\": \"token punctuation\"\n  }, \";\"), \"\\n\\n\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token comment\"\n  }, \"// Example using auth\"), \"\\nfirebase\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"app\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'SECONDARY_APP'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"auth\"), mdx(\"span\", {\n    parentName: \"code\",\n    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\"language-js\"\n  }, mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token keyword\"\n  }, \"await\"), \" firebase\", mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"app\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token string\"\n  }, \"'SECONDARY_APP'\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \")\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \".\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token method function property-access\"\n  }, \"delete\"), mdx(\"span\", {\n    parentName: \"code\",\n    \"className\": \"token punctuation\"\n  }, \"(\"), mdx(\"span\", 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