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Neste guia de início rápido, mostramos como adicionar Google Analytics ao seu app e
começar a registrar eventos.
O Google Analytics coleta dados de uso e comportamento do seu app da Web. O SDK
registra dois tipos principais de informações:
Eventos: o que acontece no seu app, como ações do usuário, eventos
do sistema ou erros.
Propriedades do usuário: atributos que você define para descrever segmentos da sua base de
usuários, como preferência de idioma ou localização geográfica.
O Analytics registra automaticamente alguns
eventos e
propriedades do usuário.
Não é preciso adicionar códigos para ativá-los.
Se você estiver criando um novo projeto do Firebase, ative o Google Analytics
durante a criação dele.
Se você estiver usando um projeto do Firebase que não tenha
o Google Analytics ativado, acesse a guia
Integrações
das suas settings >
Configurações do projeto para ativá-lo.
Quando você ativa o Google Analytics no seu projeto, os apps da Web do Firebase
são vinculados a fluxos de dados Google Analytics associados a uma
propriedade App + Web.
Adicionar o SDK do Analytics ao seu app
Dependendo de como seu app da Web é hospedado, sua configuração pode ser
gerenciada automaticamente ou pode ser necessário atualizar seu
objeto de configuração do Firebase.
Se o app da Web já usa o Google Analytics, pode ser necessário fazer a configuração adicional
descrita em Usar o Firebase com uma tag gtag.js existente.
Verifique se o objeto de configuração do Firebase no seu código contém measurementId. Esse ID é criado automaticamente quando você ativa o Analytics no seu projeto do Firebase e registra um app da Web. Ele é
necessário para usar o Analytics.
Se o app usa Firebase HostingeURLs reservados para os SDKs do Firebase:
O Firebase configurará seu aplicativo automaticamente. Para concluir
a configuração, adicione os scripts do card Seus apps nas Configurações do projeto
à tag <body> do app, se já não tiver feito isso.
Se o app não usa URLs reservados:
se você estiver trabalhando com um app da Web existente, atualize o objeto de configuração do Firebase
no código para garantir que o campo measurementId esteja presente. O
objeto de configuração será semelhante ao exemplo a seguir:
// For FirebaseJavaScript SDK v7.20.0 and later, `measurementId` is an optional fieldconstfirebaseConfig={apiKey:"API_KEY",authDomain:"PROJECT_ID.firebaseapp.com",databaseURL:"https://PROJECT_ID.firebaseio.com",projectId:"PROJECT_ID",storageBucket:"PROJECT_ID.firebasestorage.app",messagingSenderId:"SENDER_ID",appId:"APP_ID",measurementId:"G-GA_MEASUREMENT_ID"};
Se você já tinha o Google Analytics em execução no seu app usando o
snippet gtag.js, seu app poderá exigir uma configuração adicional se você planeja executar um dos seguintes procedimentos:
Adicionar chamadas do Google Analytics do Firebase para a página, mas também continuar usando chamadas gtag() diretamente na mesma página
Usar o mesmo ID de métricas entre chamadas gtag() diretas e
dados do Google Analytics enviados para o Firebase.
Para garantir que seus eventos estejam disponíveis para uso por todos os serviços do Firebase, execute as seguintes etapas adicionais de configuração:
Remova a linha gtag('config', 'GA_MEASUREMENT_ID');
em que GA_MEASUREMENT_ID é o measurementId do seu app da Web do Firebase. Se você tiver outros IDs para outras propriedades do Google Analytics na página, não precisará remover a linha de configuração delas.
Chame firebase.analytics() antes de enviar qualquer evento com gtag().
Caso contrário, os eventos enviados para esse ID com chamadas gtag() não serão associados ao Firebase e não estarão disponíveis para segmentação em outros serviços do Firebase.
Alguns eventos são recomendados para todos os apps, outros são indicados para tipos de negócios ou indústrias específicas. Você precisa enviar os eventos sugeridos junto com os parâmetros prescritos para garantir o máximo de detalhes nos relatórios e aproveitar os recursos e as integrações assim que forem disponibilizados. Nesta seção, demonstramos a geração de registros de um evento pré-definido. Para mais informações sobre a geração de registros de eventos, consulte Registrar eventos.
No exemplo a seguir, mostraremos como registrar um evento recomendado para indicar que um
usuário recebeu uma notificação no seu app:
[[["Fácil de entender","easyToUnderstand","thumb-up"],["Meu problema foi resolvido","solvedMyProblem","thumb-up"],["Outro","otherUp","thumb-up"]],[["Não contém as informações de que eu preciso","missingTheInformationINeed","thumb-down"],["Muito complicado / etapas demais","tooComplicatedTooManySteps","thumb-down"],["Desatualizado","outOfDate","thumb-down"],["Problema na tradução","translationIssue","thumb-down"],["Problema com as amostras / o código","samplesCodeIssue","thumb-down"],["Outro","otherDown","thumb-down"]],["Última atualização 2025-09-05 UTC."],[],[],null,["iOS+ Android Web Flutter \n\n\u003cbr /\u003e\n\nThis quickstart shows you how to add Google Analytics to your app and\nbegin logging events.\n\nGoogle Analytics collects usage and behavior data for your app. The SDK\nlogs two primary types of information:\n\n- **Events:** What is happening in your app, such as user actions, system events, or errors.\n- **User properties:** Attributes you define to describe segments of your user base, such as language preference or geographic location.\n\nAnalytics automatically logs some\n[events](https://support.google.com/firebase/answer/6317485) and\n[user properties](https://support.google.com/firebase/answer/6317486);\nyou don't need to add any code to enable them.\n\nBefore you begin\n\nIf you haven't already, [add Firebase to your JavaScript\nproject](/docs/web/setup) and make sure that Google Analytics is enabled\nin your Firebase project:\n\n- If you're creating a new Firebase project, enable Google Analytics\n during the project creation workflow.\n\n- If you're using an existing Firebase project that doesn't have\n Google Analytics enabled, go to the\n [*Integrations*](//console.firebase.google.com/project/_/settings/integrations)\n tab of your settings \\\u003e *Project settings* to enable it.\n\n| **Warning:** Any Firebase project created before July 31, 2019 must be upgraded to the full [Google Analytics 4 experience](https://support.google.com/analytics/answer/10089681) if it hasn't already. (Banners display in the Analytics dashboard if an upgrade is required.) The associated Terms of Service must be [accepted by February 15, 2022](https://support.google.com/analytics/answer/10960488) to ensure data collection continues. See the Support FAQ on the upgrade for help [finding project Owners](/support/faq#analytics-upgrade-tos).\n\nWhen you enable Google Analytics in your project, your Firebase web apps\nare linked to Google Analytics data streams associated with an\n[App + Web property](//developers.google.com/analytics/devguides/collection/app-web/tag-guide).\n\nAdd the Analytics SDK to your app\n\nDepending on how your web application is hosted, your configuration may be\nhandled automatically or you may need to update your\n[Firebase configuration object](/docs/projects/learn-more#config-files-objects).\nIf your web app already uses Google Analytics, you may need to do additional\nsetup described in [Use Firebase with existing gtag.js tagging](#firebase-gtag).\n\n1. Check that your Firebase config object in your code contains\n `measurementId`. This ID is automatically created when you enable\n Analytics in your Firebase project and register a web app, and it's\n required to use Analytics.\n\n | **Note:** For apps using the **Firebase JavaScript SDK v7.20.0 and later** , Firebase dynamically fetches the `measurementId` when your app initializes Analytics. Having this ID in your config object is optional, but it does serve as a fallback in the rare case that the dynamic fetch fails.\n - **If your app uses Firebase Hosting *and* uses\n [reserved URLs](/docs/hosting/reserved-urls) for the Firebase SDKs**:\n\n Firebase automatically handles configuring your application. To complete\n setup, add the scripts from the ***Your apps*** card in your\n [Project settings](https://console.firebase.google.com/project/_/settings/general/)\n to the \\\u003cbody\\\u003e tag of your app, if you haven't already.\n - **If your app does not use reserved URLs** :\n **If you're working with an existing web app** , update the Firebase config\n object in your code to ensure the `measurementId` field is present. The\n config object should look similar to the following example:\n\n // For Firebase JavaScript SDK v7.20.0 and later, `measurementId` is an optional field\n const firebaseConfig = {\n apiKey: \"\u003cvar translate=\"no\"\u003eAPI_KEY\u003c/var\u003e\",\n authDomain: \"\u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e.firebaseapp.com\",\n databaseURL: \"https://\u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e.firebaseio.com\",\n projectId: \"\u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e\",\n storageBucket: \"\u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e`.firebasestorage.app`\",\n messagingSenderId: \"\u003cvar translate=\"no\"\u003eSENDER_ID\u003c/var\u003e\",\n appId: \"\u003cvar translate=\"no\"\u003eAPP_ID\u003c/var\u003e\",\n measurementId: \"G-\u003cvar translate=\"no\"\u003eGA_MEASUREMENT_ID\u003c/var\u003e\"\n };\n\n2. If you haven't already, [install the Firebase JS SDK and initialize Firebase](/docs/web/setup#add-sdk-and-initialize).\n\n3. Add the Analytics JS SDK and initialize Analytics:\n\nWeb\n\n\n| [Learn more](/docs/web/learn-more#modular-version) about the tree-shakeable modular web API and [upgrade](/docs/web/modular-upgrade) from the namespaced API.\n\n\u003cbr /\u003e\n\n```python\nimport { initializeApp } from \"firebase/app\";\nimport { getAnalytics } from \"firebase/analytics\";\n\n// TODO: Replace the following with your app's Firebase project configuration\n// See: https://firebase.google.com/docs/web/learn-more#config-object\nconst firebaseConfig = {\n // ...\n};\n\n// Initialize Firebase\nconst app = initializeApp(firebaseConfig);\n\n\n// Initialize Analytics and get a reference to the service\nconst analytics = getAnalytics(app);\n```\n\nWeb\n\n\n| [Learn more](/docs/web/learn-more#modular-version) about the tree-shakeable modular web API and [upgrade](/docs/web/modular-upgrade) from the namespaced API.\n\n\u003cbr /\u003e\n\n```python\nimport firebase from \"firebase/compat/app\";\nimport \"firebase/compat/analytics\";\n\n// TODO: Replace the following with your app's Firebase project configuration\n// See: https://firebase.google.com/docs/web/learn-more#config-object\nconst firebaseConfig = {\n // ...\n};\n\n// Initialize Firebase\nfirebase.initializeApp(firebaseConfig);\n\n\n// Initialize Analytics and get a reference to the service\nconst analytics = firebase.analytics();\n```\n\nUse Firebase with existing gtag.js tagging\n\nIf you previously had Google Analytics running in your app using the\n[gtag.js snippet](//developers.google.com/analytics/devguides/collection/gtagjs/),\nyour app may require additional setup if you plan to do one of the following:\n\n- Add Google Analytics calls from Firebase to the page but also plan to continue using `gtag()` calls directly on the same page.\n- Want to use the same measurement ID between both direct `gtag()` calls and Google Analytics data sent to Firebase.\n\nTo ensure your events are available for use by all Firebase services, complete\nthe following additional setup steps:\n\n- Remove the line `gtag('config', '`\u003cvar translate=\"no\"\u003eGA_MEASUREMENT_ID\u003c/var\u003e`');` where the `GA_MEASUREMENT_ID` is the `measurementId` of your Firebase web app. If you have other IDs for other Analytics properties on the page, you do not need to remove their config line.\n- Make sure you call `firebase.analytics()` before you send any events with `gtag()`.\n\nOtherwise, events sent to that ID with `gtag()` calls will not be associated\nwith Firebase and will not be available for targeting in other\nFirebase services.\n\nStart logging events\n\nAfter you have initialized the\n[Analytics service](/docs/reference/js/analytics), you can\nbegin to log events with the\n[`logEvent()`](/docs/reference/js/analytics#logevent)\nmethod.\n\nCertain events are\n[recommended for all apps](https://support.google.com/firebase/answer/6317498);\nothers are recommended for specific business types or verticals. You should send\nsuggested events along with their prescribed parameters, to ensure maximum\navailable detail in your reports and to benefit from future features and\nintegrations as they become available. This section demonstrates logging a\npre-defined event, for more information on logging events, see\n[Log events](/docs/analytics/events?platform=web).\n\nThe following example demonstrates how to log a recommended event to indicate a\nuser has received a notification in your app: \n\nWeb \n\n```javascript\nimport { getAnalytics, logEvent } from \"firebase/analytics\";\n\nconst analytics = getAnalytics();\nlogEvent(analytics, 'notification_received');https://github.com/firebase/snippets-web/blob/467eaa165dcbd9b3ab15711e76fa52237ba37f8b/snippets/analytics-next/index/analytics_log_event.js#L8-L11\n```\n\nWeb \n\n```javascript\nfirebase.analytics().logEvent('notification_received');https://github.com/firebase/snippets-web/blob/467eaa165dcbd9b3ab15711e76fa52237ba37f8b/analytics/index.js#L12-L12\n```\n\nNext steps\n\n- Understand [each Analytics report](/docs/analytics/reports).\n- Use the [DebugView](/docs/analytics/debugview) to verify your events.\n- Explore your data in the [Firebase console](//console.firebase.google.com/project/_/analytics/).\n- Explore the guides on [events](/docs/analytics/events?platform=web) and [user properties.](/docs/analytics/user-properties?platform=web)\n- Learn how to export your data to [BigQuery.](https://support.google.com/firebase/answer/7030014)"]]