Create Feature Flags For Your React App with Firebase Remote Config

Create Feature Flags For Your React App with Firebase Remote Config

Feature flags (toggles / switches), as the name suggested, are for switching on and off certain features in your application. You can add feature flags to perform A/B testing by switching on beta features for some users. Here I’m going to show you how to implement features flags with Firebase Remote Config with React.

Feature flags (toggles / switches), as the name suggested, are for switching on and off certain features in your application. You can add feature flags to perform A/B testing by switching on beta features for some users. You can use them as a fail-safe switch in case something goes wrong in production. Or you can use them to hide your work-in-progress features.

Here I’m going to show you how to implement features flags with Firebase Remote Config with React.

1. Initialize Firebase 🔥

We need to install 2 packages for this demo. If you have already setup Firebase in your project, just install semver and I’ll explain what’s it for later.

yarn add firebase semver

Then, create a file firebase.js to initialize the Firebase instance along with other Firebase services you need, which would be remote-config in our case.

// firebase.js
import Firebase from 'firebase/app';
import 'firebase/remote-config';

const firebaseConfig = {};
export const firebase = Firebase.initializeApp(firebaseConfig);

Head over to your Firebase Console and create a new project if you don’t have one. Then go to the Project Settings page to get your Firebase SDK configs and paste it into firebase.js .

// Example
const firebaseConfig = {
  apiKey: "Your Api Key",
  authDomain: "yourapp.firebaseapp.com",
  databaseURL: "https://yourapp.firebaseio.com",
  projectId: "yourapp",
  storageBucket: "yourapp.appspot.com",
  messagingSenderId: "Some ID",
  appId: "Some ID",
  measurementId: "Some ID"
};

With the firebase instance initialized, we can pass it around and invoke all the available services.

javascript react firebase web-development programming

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