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Leveraging Next.js and Firebase to Fetch Upcoming Events: A Deep Dive

At, we've developed over 30 projects using Next.js and Firebase, gaining valuable insights into efficient web development practices. Today, we'll dissect a practical example of how to integrate Firebase with Next.js for a common web application feature: fetching and displaying upcoming events.

Understanding the Code

Let's break down the following Next.js code snippet which is used to fetch data from a Firestore collection:

export async function getServerSideProps() {
  const snapshot = await firebase.firestore().collection('events').where('upcoming', '==', true).get();
  const events = => ({ id:, }));
  return {
    props: {
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What is getServerSideProps?

getServerSideProps is a function provided by Next.js that allows you to pre-render a page at request time using the data returned from an asynchronous operation. This function runs only on the server side.

Firestore Query

The code snippet executes a Firestore query in the getServerSideProps function. Here's what it does step-by-step:

  1. Query Firestore: It queries the events collection within the Firestore database, filtering documents where the field upcoming is true.
  2. Mapping Documents: It retrieves these documents as a snapshot, mapping over to create a new array. Each document is transformed into an object that includes the unique document ID (id) and all the other data fields spread into this object using the JavaScript spread operator (...).
  3. Server-Side Props: The result is returned as props to the React component, which will then render the upcoming events based on this data.

Benefits of Using getServerSideProps with Firestore

Integrating Firestore with Next.js via getServerSideProps offers significant advantages:

  • Performance: Since the data fetching happens at the server level before page delivery, the client receives a page with all the necessary data pre-loaded, improving the load time.
  • SEO: Server-rendered content is beneficial for SEO, as the content is already present when search engines crawl the page.
  • Security: Keeping data fetching and business logic on the server can enhance the security of your application.

Practical Applications

This method is commonly used in applications where timely information delivery is critical, such as event management systems, news platforms, or any dynamic content generation websites.


With our experience at, integrating Firebase with Next.js using getServerSideProps has simplified our development process and enriched user and client experiences. To see this integration in action, check out some of our applications: English Word Search Tool, Online Microphone Tester, and Image Compression Tool.

Understanding and leveraging these technologies can significantly impact your web projects, from development to deployment and beyond.

Top comments (1)

jenesh profile image
Jenesh Napit

Nice examples, thanks!