Complete Firebase Cheatsheet in React JS

Firebase is an incredibly powerful platform that can help you build and manage applications quickly and easily. It provides a range of services, from authentication to hosting, and its integration with React makes it even more powerful. In this article, we'll provide a complete cheatsheet for Firebase integration in React, including installation, authentication, Firestore integration, storage integration, and analytics integration.

Installing Firebase into Your Project

The first step in integrating Firebase into your React project is to install the Firebase SDK. To do this, you'll need to open a terminal window and run the following command:

npm install firebase

Once the installation is complete, you'll need to import the Firebase library into your React component. To do this, you'll need to add the following line to the top of your component:

import firebase from 'firebase/app';

Authentication with Firebase in React JS

Firebase provides an easy way to authenticate users with your React application. Here, we'll provide examples for the three most common authentication methods: registration, login, and SMS verification.

Registration with Firebase in React

To register a user with Firebase, you'll need to use the createUserWithEmailAndPassword method. This method takes two parameters, the user's email address and a password. Here's an example of how you might use it:

firebase.auth().createUserWithEmailAndPassword(email, password)
  .then(function(user) {
    console.log('User registered successfully!');
  })
  .catch(function(error) {
    console.log('Error registering user:', error);
  });

Login with Firebase in React

Once a user has been registered, you'll need to provide them with a way to log in. To do this, you can use the signInWithEmailAndPassword method. This method takes two parameters, the user's email address and a password. Here's an example of how you might use it:

firebase.auth().signInWithEmailAndPassword(email, password)
  .then(function(user) {
    console.log('User logged in successfully!');
  })
  .catch(function(error) {
    console.log('Error logging in user:', error);
  });

SMS Verification with Firebase in React

Firebase also provides the ability to send an SMS message to a user's phone to verify their identity. To do this, you'll need to use the sendSignInLinkToEmail method. This method takes two parameters, the user's email address and a callback URL. Here's an example of how you might use it:

firebase.auth().sendSignInLinkToEmail(email, callbackURL)
  .then(function() {
    console.log('Verification link sent!');
  })
  .catch(function(error) {
    console.log('Error sending verification link:', error);
  });

Resetting Passwords with Firebase in React

Finally, Firebase provides the ability to reset a user's password. To do this, you'll need to use the sendPasswordResetEmail method. This method takes one parameter, the user's email address. Here's an example of how you might use it:

firebase.auth().sendPasswordResetEmail(email)
  .then(function() {
    console.log('Password reset link sent!');
  })
  .catch(function(error) {
    console.log('Error sending password reset link:', error);
  });

Firestore Integration in ReactJS

Firestore is a powerful NoSQL cloud database that can be used to store and retrieve data for your React application. In this section, we'll provide examples for writing data to Firestore, reading single data from Firestore, reading lists from Firestore, pagination with Firestore, sorting & filtering with Firestore, and grouping & aggregating with Firestore.

Writing Data to Firestore in React

To write data to Firestore, you'll need to use the set method. This method takes two parameters, the data you want to write and an optional callback function. Here's an example of how you might use it:

firebase.firestore().collection('users').doc(userId).set({
  name: 'John Doe',
  age: 30
})
  .then(function() {
    console.log('Data written successfully!');
  })
  .catch(function(error) {
    console.log('Error writing data:', error);
  });

Reading Single Data from Firestore in React

To read data from Firestore, you'll need to use the get method. This method takes one parameter, the document ID of the data you want to read. Here's an example of how you might use it:

firebase.firestore().collection('users').doc(userId).get()
  .then(function(doc) {
    console.log('Data retrieved successfully!');
    console.log(doc.data());
  })
  .catch(function(error) {
    console.log('Error retrieving data:', error);
  });

Reading Lists from Firestore in React

To read a list of data from Firestore, you'll need to use the get method. This method takes one parameter, a query object that specifies the data you want to retrieve. Here's an example of how you might use it:

firebase.firestore().collection('users').where('age', '>', 25).get()
  .then(function(querySnapshot) {
    console.log('Data retrieved successfully!');
    querySnapshot.forEach(function(doc) {
      console.log(doc.data());
    });
  })
  .catch(function(error) {
    console.log('Error retrieving data:', error);
  });

Pagination with Firestore in React

Firestore also provides the ability to paginate data, which can be useful for large datasets. To do this, you'll need to use the startAfter and limit methods. This method takes two parameters, the number of documents you want to skip, and the maximum number of documents you want to retrieve. Here's an example of how you might use it:

firebase.firestore().collection('users').startAfter(10).limit(10).get()
  .then(function(querySnapshot) {
    console.log('Data retrieved successfully!');
    querySnapshot.forEach(function(doc) {
      console.log(doc.data());
    });
  })
  .catch(function(error) {
    console.log('Error retrieving data:', error);
  });

Sorting & Filtering with Firestore in React

Firestore also provides the ability to sort and filter data. To do this, you'll need to use the orderBy and where methods. This method takes two parameters, the field you want to sort by and the condition you want to filter by. Here's an example of how you might use it:

firebase.firestore().collection('users').orderBy('name').where('age', '>', 25).get()
  .then(function(querySnapshot) {
    console.log('Data retrieved successfully!');
    querySnapshot.forEach(function(doc) {
      console.log(doc.data());
    });
  })
  .catch(function(error) {
    console.log('Error retrieving data:', error);
  });

Grouping & Aggregating with Firestore in React

Finally, Firestore provides the ability to group and aggregate data. To do this, you'll need to use the groupBy and sum methods. This method takes two parameters, the field you want to group by and the field you want to sum. Here's an example of how you might use it:

firebase.firestore().collection('users').groupBy('age').sum('score').get()
  .then(function(querySnapshot) {
    console.log('Data retrieved successfully!');
    querySnapshot.forEach(function(doc) {
      console.log(doc.data());
    });
  })
  .catch(function(error) {
    console.log('Error retrieving data:', error);
  });

Firebase Storage Integration in React

Firebase Storage provides a way to store files such as images, videos, and documents. To use Firebase Storage, you'll need to use the ref method. This method takes one parameter, the file path you want to store the file at. Here's an example of how you might use it:

firebase.storage().ref('users/' + userId + '/profileImage.jpg').put(file)
  .then(function(snapshot) {
    console.log('File uploaded successfully!');
  })
  .catch(function(error) {
    console.log('Error uploading file:', error);
  });

Analytics Integration in React

Firebase Analytics provides a way to track user behavior and gain insights into how your application is being used. To use Firebase Analytics, you'll need to use the logEvent method. This method takes two parameters, the event name and an optional set of parameters. Here's an example of how you might use it:

firebase.analytics().logEvent('user_signup', {
  user_id: userId
})
  .then(function() {
    console.log('Event logged successfully!');
  })
  .catch(function(error) {
    console.log('Error logging event:', error);
  });

Conclusion

In this article, we've provided a complete cheatsheet for Firebase integration in React, including installation, authentication, Firestore integration, storage integration, and analytics integration. We've also provided concrete step by step code snippets, with documentation, to help you get started with Firebase in React.