Formas alternativas de agregar Firebase a tu proyecto de JavaScript
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Para la mayoría de las apps web de Firebase, recomendamos usar
el SDK a través de npm.
Sin embargo, Firebase proporciona formas alternativas de agregar el SDK
a los usuarios con requisitos especiales.
En esta página, se proporcionan instrucciones de configuración detalladas para los siguientes métodos alternativos:
Puedes configurar la importación parcial del SDK de FirebaseJavaScript y cargar solo los
productos de Firebase que necesitas. Firebase almacena cada biblioteca del
SDK de FirebaseJavaScript en nuestra CDN (red de distribución de contenidos) global.
Para incluir solo productos específicos de Firebase
(por ejemplo, Authentication y Cloud Firestore), agrega la siguiente:
secuencia de comandos en la parte inferior de la etiqueta <body>, pero antes de usar cualquier
servicio de Firebase:
<body>
<!--InsertthisscriptatthebottomoftheHTML,butbeforeyouuseanyFirebaseservices-->
<scripttype="module">
import{initializeApp}from'https://www.gstatic.com/firebasejs/12.1.0/firebase-app.js'// If you enabled Analytics in your project, add the Firebase SDK for Google Analyticsimport{getAnalytics}from'https://www.gstatic.com/firebasejs/12.1.0/firebase-analytics.js'// Add Firebase products that you want to useimport{getAuth}from'https://www.gstatic.com/firebasejs/12.1.0/firebase-auth.js'import{getFirestore}from'https://www.gstatic.com/firebasejs/12.1.0/firebase-firestore.js'</script>
</body>
Agrega el objeto de configuración de Firebase y, luego, inicializa Firebase en
tu app:
<body>
<scripttype="module">
// ...// TODO: Replace the following with your app's Firebase configurationconstfirebaseConfig={// ...};// Initialize Firebaseconstapp=initializeApp(firebaseConfig);</script>
</body>
Apps de Node.js
Instala el SDK de FirebaseJavaScript
Si aún no tienes un archivo package.json, ejecuta el siguiente comando para crear uno desde la raíz de tu proyecto de JavaScript:
npm init
Instala el paquete npm de firebase y guárdalo en el archivo package.json. Para ello, ejecuta el siguiente comando:
npm install --save firebase@12.1.0
Utiliza una de las siguientes opciones para usar el módulo de Firebase en tu app:
Puedes usar el comando require para solicitar módulos de cualquier archivo de JavaScript
// Firebase App (the core Firebase SDK) is always required and// must be listed before other Firebase SDKsvarfirebase=require("firebase/app");// Add the Firebase products that you want to userequire("firebase/auth");require("firebase/firestore");
Incluye todo el SDK de FirebaseJavaScript, en lugar
de los SDKs individuales
(no recomendado para apps de producción)
varfirebase=require("firebase");
Puedes usar la sintaxis de ESM para importar módulos con el comando import
// Firebase App (the core Firebase SDK) is always required and// must be listed before other Firebase SDKsimportfirebasefrom"firebase/app";// Add the Firebase services that you want to useimport"firebase/auth";import"firebase/firestore";
Incluye todo el SDK de FirebaseJavaScript, en lugar
de los SDKs individuales
(no recomendado para apps de producción)
importfirebasefrom"firebase";
Agrega el objeto de configuración de Firebase y, luego, inicializa Firebase en
tu app:
import{initializeApp}from'firebase/app';// TODO: Replace the following with your app's Firebase configurationconstfirebaseConfig={//...};// Initialize Firebaseconstapp=initializeApp(firebaseConfig);
[null,null,["Última actualización: 2025-08-12 (UTC)"],[],[],null,["\u003cbr /\u003e\n\nFor most Firebase web apps we strongly recommend using\n[the SDK via npm](/docs/web/setup).\nHowever, for users with special requirements, Firebase provides alternative\n[ways to add the SDK](/docs/web/learn-more#ways-to-add-web-sdks).\nThis page provides detailed setup instructions for these alternative methods:\n\n- CDN (content delivery network)\n- npm for Node.js apps\n\nUsing these methods, you can add any of the\n[available libraries](/docs/web/learn-more#available-libraries)\nto your app. \n\nFrom the CDN\n\nYou can configure partial import of the Firebase JavaScript SDK and only load the\nFirebase products that you need. Firebase stores each library of the\nFirebase JavaScript SDK on our global CDN (content delivery network).\n\n1. To include only [specific Firebase products](/docs/web/learn-more#libraries-cdn)\n (for example, Authentication and Cloud Firestore), add the following\n script to the bottom of your `\u003cbody\u003e` tag, but before you use any\n Firebase services:\n\n ```javascript\n \u003cbody\u003e\n \u003c!-- Insert this script at the bottom of the HTML, but before you use any Firebase services --\u003e\n \u003cscript type=\"module\"\u003e\n import { initializeApp } from 'https://www.gstatic.com/firebasejs/12.1.0/firebase-app.js'\n\n // If you enabled Analytics in your project, add the Firebase SDK for Google Analytics\n import { getAnalytics } from 'https://www.gstatic.com/firebasejs/12.1.0/firebase-analytics.js'\n\n // Add Firebase products that you want to use\n import { getAuth } from 'https://www.gstatic.com/firebasejs/12.1.0/firebase-auth.js'\n import { getFirestore } from 'https://www.gstatic.com/firebasejs/12.1.0/firebase-firestore.js'\n \u003c/script\u003e\n \u003c/body\u003e\n ```\n | You can optionally [delay loading of Firebase SDKs](/docs/web/learn-more#delay-sdks-cdn) until the entire page has loaded.\n2. Add your Firebase configuration object, and then initialize Firebase in\n your app:\n\n ```javascript\n \u003cbody\u003e\n \u003cscript type=\"module\"\u003e\n // ...\n\n // TODO: Replace the following with your app's /docs/web/learn-more#config-object\n const firebaseConfig = {\n // ...\n };\n\n // Initialize Firebase\n const app = initializeApp(firebaseConfig);\n \u003c/script\u003e\n \u003c/body\u003e\n ```\n\nNode.js apps**Caution:** The following instructions are for using the Firebase JavaScript SDK as a client for end-user access (for example, in a Node.js desktop or IoT application). To set up administrative access from privileged environments (such as servers), [set up the Firebase Admin SDK](/docs/admin/setup) instead.\n\n1. Install the Firebase JavaScript SDK:\n\n 1. If you don't already have a `package.json` file, create one by\n running the following command from the root of your JavaScript\n project:\n\n ```\n npm init\n ```\n 2. Install the `firebase` npm package and save it to your\n `package.json` file by running:\n\n ```\n npm install --save firebase@12.1.0\n ```\n2. Use one of the following options to use the Firebase module in your app:\n\n - **You can `require` modules from any JavaScript file**\n\n To include only [specific Firebase products](/docs/web/learn-more#libraries-nodejs)\n (like Authentication and Cloud Firestore): \n\n // Firebase App (the core Firebase SDK) is always required and\n // must be listed before other Firebase SDKs\n var firebase = require(\"firebase/app\");\n\n // Add the Firebase products that you want to use\n require(\"firebase/auth\");\n require(\"firebase/firestore\");\n\n Include the entire Firebase JavaScript SDK, rather\n than individual SDKs\n *(not recommended for production apps)*\n | Loading the entire SDK is not efficient for production web apps. \n Use this option for development purposes only. \n\n ```javascript\n var firebase = require(\"firebase\");\n ```\n\n \u003cbr /\u003e\n\n - **You can use ESM syntax to `import` modules**\n\n To include only [specific Firebase products](/docs/web/learn-more#libraries-nodejs)\n (like Authentication and Cloud Firestore): \n\n // Firebase App (the core Firebase SDK) is always required and\n // must be listed before other Firebase SDKs\n import firebase from \"firebase/app\";\n\n // Add the Firebase services that you want to use\n import \"firebase/auth\";\n import \"firebase/firestore\";\n\n Include the entire Firebase JavaScript SDK, rather\n than individual SDKs\n *(not recommended for production apps)*\n | Loading the entire SDK is not efficient for production web apps. \n Use this option for development purposes only. \n\n ```python\n import firebase from \"firebase\";\n ```\n3. Add your Firebase configuration object, and then initialize Firebase in\n your app:\n\n ```javascript\n import { initializeApp } from 'firebase/app';\n\n // TODO: Replace the following with your app's /docs/web/learn-more#config-object\n const firebaseConfig = {\n //...\n };\n\n // Initialize Firebase\n const app = initializeApp(firebaseConfig);\n ```"]]