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To get started with FCM, build out the simplest use case: sending a
notification message to a specific user
when the app is in the background on the device.
This page lists all the steps to achieve this, from setup to verification
— it may cover steps you already completed if you
have set up a JavaScript client app
for FCM.
When you need to retrieve the current registration token for an app instance, first
request notification permissions from the user with Notification.requestPermission().
When called as shown, this returns a token if permission is granted or rejects the promise
if denied:
FCM requires a firebase-messaging-sw.js file.
Unless you already have a firebase-messaging-sw.js file, create an empty file
with that name and place it in the root of your domain before retrieving a token.
You can add meaningful content to the file later in the client setup process.
To retrieve the current token:
Web
import{getMessaging,getToken}from"firebase/messaging";// Get registration token. Initially this makes a network call, once retrieved// subsequent calls to getToken will return from cache.constmessaging=getMessaging();getToken(messaging,{vapidKey:'<YOUR_PUBLIC_VAPID_KEY_HERE>'}).then((currentToken)=>{if(currentToken){// Send the token to your server and update the UI if necessary// ...}else{// Show permission request UIconsole.log('No registration token available. Request permission to generate one.');// ...}}).catch((err)=>{console.log('An error occurred while retrieving token. ',err);// ...});
// Get registration token. Initially this makes a network call, once retrieved// subsequent calls to getToken will return from cache.messaging.getToken({vapidKey:'<YOUR_PUBLIC_VAPID_KEY_HERE>'}).then((currentToken)=>{if(currentToken){// Send the token to your server and update the UI if necessary// ...}else{// Show permission request UIconsole.log('No registration token available. Request permission to generate one.');// ...}}).catch((err)=>{console.log('An error occurred while retrieving token. ',err);// ...});
If this is your first message, select Create your first
campaign.
Select Firebase Notification messages and select Create.
Otherwise, on the Campaigns tab, select New campaign
and then Notifications.
Enter the message text. All other fields are optional.
Select Send test message from the right pane.
In the field labeled Add an FCM registration token, enter the registration
token you obtained in a previous section of this guide.
Select Test.
After you select Test, the targeted client device (with the app in
the background) should receive the notification.
Next steps
Send messages to foregrounded apps
Once you have successfully sent notification messages while your app is in
the background, see
Receive Messages in a JavaScript Client
to get started sending to foregrounded apps.
Go beyond notification messages
To go beyond notification messages and add other, more advanced behavior to your
app, see:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["To get started with FCM, build out the simplest use case: sending a\nnotification message to a specific user\nwhen the app is in the background on the device.\nThis page lists all the steps to achieve this, from setup to verification\n--- it may cover steps you already completed if you\nhave [set up a JavaScript client app](/docs/cloud-messaging/js/client)\nfor FCM.\n| **Important:** This guide focuses on the background case. If you want to receive messages when your app is in the foreground as well, see also [Receive Messages in a JavaScript Client](/docs/cloud-messaging/js/receive).\n\nSet up the SDK\n\nIf you haven't already, [add Firebase to your JavaScript project](/docs/web/setup).\n\nAccess the registration token\n\nWhen you need to retrieve the current registration token for an app instance, first\nrequest notification permissions from the user with `Notification.requestPermission()`.\nWhen called as shown, this returns a token if permission is granted or rejects the promise\nif denied:\n\n```javascript\nfunction requestPermission() {\n console.log('Requesting permission...');\n Notification.requestPermission().then((permission) =\u003e {\n if (permission === 'granted') {\n console.log('Notification permission granted.');\n```\n\n\u003cbr /\u003e\n\nFCM requires a `firebase-messaging-sw.js` file.\nUnless you already have a `firebase-messaging-sw.js` file, create an empty file\nwith that name and place it in the root of your domain before retrieving a token.\nYou can add meaningful content to the file later in the client setup process.\n\nTo retrieve the current token: \n\nWeb \n\n```javascript\nimport { getMessaging, getToken } from \"firebase/messaging\";\n\n// Get registration token. Initially this makes a network call, once retrieved\n// subsequent calls to getToken will return from cache.\nconst messaging = getMessaging();\ngetToken(messaging, { vapidKey: '\u003cYOUR_PUBLIC_VAPID_KEY_HERE\u003e' }).then((currentToken) =\u003e {\n if (currentToken) {\n // Send the token to your server and update the UI if necessary\n // ...\n } else {\n // Show permission request UI\n console.log('No registration token available. Request permission to generate one.');\n // ...\n }\n}).catch((err) =\u003e {\n console.log('An error occurred while retrieving token. ', err);\n // ...\n});https://github.com/firebase/snippets-web/blob/467eaa165dcbd9b3ab15711e76fa52237ba37f8b/snippets/messaging-next/index/messaging_get_token.js#L8-L25\n```\n\nWeb \n\n```javascript\n// Get registration token. Initially this makes a network call, once retrieved\n// subsequent calls to getToken will return from cache.\nmessaging.getToken({ vapidKey: '\u003cYOUR_PUBLIC_VAPID_KEY_HERE\u003e' }).then((currentToken) =\u003e {\n if (currentToken) {\n // Send the token to your server and update the UI if necessary\n // ...\n } else {\n // Show permission request UI\n console.log('No registration token available. Request permission to generate one.');\n // ...\n }\n}).catch((err) =\u003e {\n console.log('An error occurred while retrieving token. ', err);\n // ...\n});https://github.com/firebase/snippets-web/blob/467eaa165dcbd9b3ab15711e76fa52237ba37f8b/messaging/index.js#L27-L41\n```\n\nAfter you've obtained the token, send it to your app server and store\nit using your preferred method.\n\nSend a test notification message\n\n1. Install and run the app on the target device. On Apple devices, you'll need\n to accept the request for permission to receive remote notifications.\n\n2. Make sure the app is in the background on the device.\n\n3. In the Firebase console, open the [Messaging page](https://console.firebase.google.com/project/_/messaging/).\n\n4. If this is your first message, select **Create your first\n campaign**.\n\n 1. Select **Firebase Notification messages** and select **Create**.\n5. Otherwise, on the **Campaigns** tab, select **New campaign**\n and then **Notifications**.\n\n6. Enter the message text. All other fields are optional.\n\n7. Select **Send test message** from the right pane.\n\n8. In the field labeled **Add an FCM registration token**, enter the registration\n token you obtained in a previous section of this guide.\n\n9. Select **Test**.\n\nAfter you select **Test**, the targeted client device (with the app in\nthe background) should receive the notification.\n\nNext steps\n\nSend messages to foregrounded apps\n\nOnce you have successfully sent notification messages while your app is in\nthe background, see\n[Receive Messages in a JavaScript Client](/docs/cloud-messaging/js/receive)\nto get started sending to foregrounded apps.\n\nGo beyond notification messages\n\nTo go beyond notification messages and add other, more advanced behavior to your\napp, see:\n\n- [Receive Messages in a JavaScript Client](/docs/cloud-messaging/js/receive)\n- [Send Messages to Multiple Devices](/docs/cloud-messaging/js/send-multiple)"]]