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1. Identify the Biometric Fingerprint-Based Authentication Solution: The first step is to identify a biometric fingerprint-based authentication solution that can be integrated with your application. Some popular options including FingerprintJS, BioID, and DigitalPersona.

2. Install the Biometric Fingerprint-Based Authentication Solution: Once you have identified the solution that you want to use, the next step is to install it in your application. Most solutions come with installation instructions that you can follow. For example, if you are using FingerprintJS, you can use a package manager like npm to install it.

3. Integrate the Solution with Your ReactJS Application: Next, you need to integrate the biometric fingerprint-based authentication solution with your ReactJS application. This means adding the necessary code to the relevant components in your application to support the authentication process. For example, you may need to add a <fingerprintreader/> component to your login screen.

4. Create a Service to Handle the Authentication Process: Once the biometric fingerprint-based authentication solution has been integrated with your ReactJS application, you need to create a service to handle the authentication process. This service will communicate with the biometric fingerprint-based authentication solution and authenticate users based on their fingerprints.

5. Add Middleware to Your Nodejs Backend: In order for the biometric fingerprint-based authentication to work, you need to add middleware to your Nodejs backend. This middleware will handle the authentication requests from your ReactJS application and provide the necessary responses.

6. Store the Fingerprint Data in MongoDB: Finally, you need to store the fingerprint data in your MongoDB database. This will allow you to authenticate users based on their fingerprints even if they are not currently logged in. You can use a library like mongoose to interact with your MongoDB database.

Once all these steps have been completed, your ReactJS web application will now support biometric fingerprint-based authentication. This will provide an additional layer of security for your users and help prevent unauthorized access to your application.