Building and Deploying Serverless Applications with NextJS and Vercel.pdf

Building and Deploying Serverless Applications
with NextJS and Vercel
In the modern world of web development, serverless applications have emerged as a
popular and efficient approach to building and deploying web applications. With the
power of NextJS and Vercel, developers can create highly scalable and performant
applications with ease. In this blog, we will explore the advantages of using NextJS, a
cutting-edge React framework, in combination with Vercel, a robust deployment
platform, to build and deploy serverless applications.
NextJS provides server rendering and static site generation capabilities, making it an
ideal choice for creating hybrid applications with improved performance. On the
other hand, Vercel is a deployment platform designed specifically for serverless
functions, offering a global CDN and edge network for fast content delivery.
Together, NextJS and Vercel streamline the process of developing and deploying
serverless applications, allowing NextJS developers to focus on what matters most –
creating a fantastic user experience.
Throughout this blog, we will discuss the process of building a serverless application
using NextJS, including installation, project setup, and essential features such as
pages, components, and API routes. We will also delve into deploying your
application with Vercel, covering topics like Vercel CLI, Git integration, custom
domains, and environment variables. Additionally, we will explore how to utilize
Vercel’s serverless functions, optimize performance and scalability, and monitor
your application’s performance with real-time analytics.

Stay tuned as we dive into the world of building and deploying serverless
applications with NextJS and Vercel!
Table of Contents
What is NextJS?
React Framework
Server Rendering
Static Site Generation
Hybrid Applications
What is Vercel?
Deployment Platform
Serverless Functions
Global CDN and Edge Network
Continuous Integration
Getting Started with NextJS and Vercel
Installation
Project Setup
Package.json
Building a Serverless Application with NextJS
Pages
Components
API Routes
Dynamic Imports
Server-side Rendering (SSR) and Static Site Generation (SSG)
Deploying Your Application with Vercel

Vercel CLI
Git Integration
Custom Domains
Environment Variables
Deployment Logs
Utilizing Vercel’s Serverless Functions
Creating a Serverless Function
The handler function receives two arguments
Deploying Your Serverless Function
Accessing Your Serverless Function
Using Middleware
Optimizing Performance and Scalability
Incremental Static Regeneration (ISR)
Image Optimization
Code Splitting
Caching and CDN
Monitoring and Analytics
Vercel Analytics
Custom Logging
Third-Party Monitoring and Analytics Tools
Performance Audits
Conclusion
Key Takeaways:
What is NextJS?

NextJS is a powerful React framework designed to streamline the development of
server-rendered, static, and hybrid web applications. Its focus on improving
performance and flexibility makes it a popular choice among developers looking to
build modern, feature-rich applications.
● React Framework
NextJS is built on top of React, a widely used JavaScript library for building user
interfaces. This means developers can leverage the power of React components and
the rich ecosystem of libraries and tools while benefiting from the additional
features and optimizations provided by NextJS.
● Server Rendering
One of the key advantages of using NextJS is its ability to perform server-side
rendering (SSR). This means that the initial HTML content is generated on the server,
allowing for faster page load times and improved search engine optimization (SEO).
Server rendering is particularly useful for dynamic pages with frequently changing
content, as it ensures that users always receive the most up-to-date information.
● Static Site Generation
NextJS also supports static site generation (SSG), which pre-renders HTML pages
during the build process. This approach is ideal for content that doesn’t change
frequently, as it can be cached and served directly to users without additional server
processing. SSG offers faster load times, lower server resource usage, and improved
SEO.

● Hybrid Applications
One of the most powerful features of NextJS is its ability to create hybrid
applications, combining both server rendering and static site generation. This allows
developers to optimize their applications for performance and SEO, choosing the
most appropriate rendering method for each page or component.
By using NextJS as the foundation for your serverless applications, you can take
advantage of its advanced features, such as server-side rendering, static site
generation, and dynamic imports, to create highly performant and scalable
applications that are easy to deploy with Vercel.
What is Vercel?
Vercel is a deployment platform specifically designed for front-end developers and
serverless functions. It offers a suite of features and tools that make deploying and
managing web applications simple and efficient. In this section, we will explore some
of the key aspects of Vercel that make it an ideal choice for deploying serverless
applications built with NextJS.
● Deployment Platform
Vercel is a platform-as-a-service (PaaS) that enables developers to deploy their
applications with ease. With its focus on serverless functions, Vercel is tailored to
support modern web applications built using frameworks like NextJS. It offers
seamless integration with popular version control systems like Git, ensuring that
your deployments are always in sync with your codebase.

● Serverless Functions
Vercel provides built-in support for serverless functions, which are event-driven,
scalable, and automatically managed by the platform. This means you can write and
deploy serverless functions using Node.js, without worrying about server
provisioning, maintenance, or scaling.
● Global CDN and Edge Network
Vercel’s global content delivery network (CDN) and edge network ensure that your
application’s static assets and server-rendered pages are served quickly and
efficiently to users around the world. This results in improved performance and
reduced latency, leading to an enhanced user experience.
● Continuous Integration
Vercel supports continuous integration (CI) out of the box, automatically building
and deploying your application whenever you push changes to your Git repository.
This means that your application is always up to date with the latest code, without
any manual intervention.
By using Vercel as the deployment platform for your NextJS serverless applications,
you can leverage its powerful features, such as serverless functions, global CDN,
edge network, and continuous integration, to ensure that your applications are
performant, scalable, and easy to manage.
Getting Started with NextJS and Vercel

In this section, we’ll guide you through the initial steps of setting up a NextJS project
and preparing it for deployment on Vercel. Whether you’re a solo developer or
working with a NextJS development company, these steps will ensure you’re ready to
start building your serverless application.
● Installation
To begin, you’ll need to have Node.js and npm (Node Package Manager) installed on
your local development environment. Once you have these prerequisites, you can
install NextJS using the create-next-app command:
npx create-next-app your-app-name
Replace “your-app-name” with the desired name for your project. This command will
set up a new NextJS project with the necessary dependencies and a basic file
structure.
● Project Setup
After running the create-next-app command, navigate to the project directory using
the terminal or command prompt. Inside the project folder, you will find several
important files and folders, including:
● pages: This folder contains your application’s pages, which are automatically
converted to routes based on their file names.
● public: This folder holds static assets, such as images and stylesheets, which
can be served directly by the server.
● package.json: This file contains metadata about your project, such as its
name, version, and dependencies.
● Package.json

To deploy your NextJS application on Vercel, you’ll need to add a few scripts to the
package.json file. Open the file in your favorite text editor and update the “scripts”
section with the following:
"scripts": {
"dev": "next dev",
"build": "next build",
"start": "next start",
"export": "next export",
"vercel": "vercel"
}
These scripts allow you to run your application locally, build it for production, export
it as a static site, and deploy it to Vercel.
Now that your project is set up, you’re ready to start building your serverless
application with NextJS and deploy it using Vercel. In the next sections, we’ll explore
the process of creating pages, components, and API routes, as well as how to utilize
Vercel’s serverless functions for enhanced functionality.
Building a Serverless Application with NextJS
In this section, we’ll explore the core concepts and features of NextJS that you’ll need
to build a serverless application. Whether you’re working on your own or looking to

hire NextJS developers, understanding these fundamentals will help you create a
robust, scalable application.
● Pages
In NextJS, each page in your application is represented by a file in the pages
directory. These files are automatically converted to routes based on their file
names. For example, a file named index.js would correspond to the root route (/). To
create a new page, simply add a new file to the pages directory with the desired
route name.
● Components
NextJS applications are built using React components, which are reusable pieces of
UI that can be composed to create complex interfaces. Components can be created
as standalone files and imported into pages as needed. This modular approach
encourages code reusability and maintainability.
● API Routes
NextJS allows you to create serverless API routes by adding files to the pages/api
directory. These routes are automatically turned into serverless functions that can
be called from your application’s front-end. This makes it easy to create dynamic,
data-driven applications without the need for a separate back-end server.
● Dynamic Imports
NextJS supports dynamic imports, which enable you to load components or modules
on-demand, rather than bundling them with your application’s initial payload. This

can help reduce load times and improve the overall performance of your application.
To use dynamic imports, simply import your desired module or component using the
import() function, like so:
import dynamic from 'next/dynamic';
const DynamicComponent = dynamic(() =>
import('../components/DynamicComponent'));
● Server-side Rendering (SSR) and Static Site Generation (SSG)
NextJS provides built-in support for both server-side rendering and static site
generation, allowing you to choose the most appropriate rendering method for each
page or component in your application.
● For SSR, you can use the getServerSideProps function to fetch data on the
server and pass it as props to your component. This ensures that the latest
data is always available when a user visits your page.
export async function getServerSideProps(context) {
// Fetch data from an API or database
const data = await fetchData();
return {
props: {
data,

},
};
}
● For SSG, you can use the getStaticProps function to fetch data at build time,
generating static HTML pages that can be cached and served directly to users.
This method is ideal for content that doesn’t change frequently, as it results in
faster load times and reduced server resource usage.
export async function getStaticProps(context) {
return {
props: {
data,
},
revalidate: 60, // Optional: Sets a time (in seconds) for
incremental static regeneration
};
}

By mastering these key concepts and features of NextJS, you’ll be well-equipped to
build a serverless application that is highly performant, scalable, and easy to deploy
with Vercel.
Deploying Your Application with Vercel
Once you’ve built your serverless application using NextJS, it’s time to deploy it using
Vercel. In this section, we’ll walk you through the process of deploying your
application, whether you’re a solo developer or working with a Next JS development
company.
● Vercel CLI
To get started, install the Vercel CLI globally using npm by running the following
command:
npm install -g vercel
The Vercel CLI provides a command-line interface for managing your deployments,
allowing you to deploy, inspect, and manage your projects directly from your
terminal or command prompt.
● Git Integration
Vercel offers seamless integration with popular version control systems like Git,
making it easy to deploy your application directly from your Git repository. To
connect your NextJS project to Vercel, simply run the following command in your
project directory:

vercel
This will prompt you to log in to your Vercel account and authorize the CLI. Once
connected, Vercel will automatically detect your NextJS project and configure it for
deployment.
● Custom Domains
Vercel allows you to assign custom domains to your deployed projects. To add a
custom domain, visit the “Domains” tab in your Vercel dashboard, enter the domain
name you’d like to use, and follow the instructions to configure your DNS settings.
● Environment Variables
If your application requires environment variables, you can configure them directly
in the Vercel dashboard under the “Settings” tab for your project. This allows you to
manage sensitive information, such as API keys and database credentials, securely
and separately from your codebase.
● Deployment Logs
Vercel provides detailed deployment logs for each of your projects, allowing you to
monitor the build process, identify issues, and troubleshoot errors. To access the
logs, visit your project’s dashboard on the Vercel website and click on the
“Deployments” tab.
By following these steps, you can deploy your NextJS serverless application with
Vercel, ensuring that it is highly performant, scalable, and accessible to users
worldwide. In the next sections, we’ll explore how to utilize Vercel’s serverless

functions, optimize performance and scalability, and monitor your application’s
performance with real-time analytics.
Utilizing Vercel’s Serverless Functions
Vercel’s serverless functions offer a powerful way to enhance your NextJS application
with server-side functionality, without the need for a separate back-end server. In
this section, we’ll explore how to create and deploy serverless functions using Vercel,
as well as how to integrate them with your NextJS application.
● Creating a Serverless Function
To create a serverless function, simply add a new file to the pages/api directory in
your NextJS project. The file should export a default function with the following
signature:
export default async function handler(req, res) {
// Your serverless function code here
}
● The handler function receives two arguments
req, an object representing the incoming request, and res, an object used to send the
response. You can use these objects to read input data, perform calculations or data
processing, and send output back to the client.
● Deploying Your Serverless Function

When you deploy your NextJS application with Vercel, any serverless functions in the
pages/api directory are automatically deployed as well. These functions are hosted
on Vercel’s edge network, ensuring low-latency access for users around the world.
● Accessing Your Serverless Function
Once deployed, your serverless function can be accessed using its URL, which is
based on the file path within the pages/api directory. For example, a serverless
function in a file named pages/api/hello.js would be accessible at
https://your-domain.com/api/hello. You can call this URL from your NextJS
application using standard web APIs, such as fetch or axios.
● Using Middleware
Middleware functions allow you to perform common tasks, such as authentication or
validation, before your serverless function’s main logic is executed. To use
middleware with your serverless function, create a separate function that processes
the req and res objects, and then call it within your main handler function.
import middleware from '../middleware/middlewareFunction';
// Call middleware function
await middleware(req, res);

}
By utilizing Vercel’s serverless functions, you can enhance your NextJS application
with server-side functionality, improve performance, and simplify your overall
architecture. This approach allows you to focus on building a great user experience,
while Vercel takes care of the server management and scaling.
Optimizing Performance and Scalability
Building a high-performance and scalable application is essential for delivering a
great user experience. In this section, we’ll explore various techniques and best
practices for optimizing the performance and scalability of your NextJS serverless
application deployed on Vercel.
● Incremental Static Regeneration (ISR)
ISR allows you to update static pages without rebuilding your entire application. By
specifying a revalidate property in your getStaticProps function, you can tell NextJS
to periodically regenerate the page with updated data. This approach combines the
benefits of static site generation with the dynamic nature of server-side rendering.
export async function getStaticProps(context) {

return {
props: {
data,
},
revalidate: 60, // Regenerate the page every 60 seconds
};
}
● Image Optimization
NextJS provides a built-in Image component that automatically optimizes and resizes
images, reducing the overall payload of your application. To use the Image
component, import it from the next/image package and replace your standard HTML
img elements:
import Image from 'next/image';
function MyComponent() {
return (
<div>
<Image src="/path/to/image.jpg" alt="Example image" width={600}
height={400} />

</div>
);
}
● Code Splitting
NextJS automatically performs code splitting, creating separate bundles for each
page in your application. This means that users only download the code necessary
for the current page, reducing the initial load time. To further optimize your code,
consider using dynamic imports to load components or modules on-demand, as
discussed in the “Building a Serverless Application with NextJS” section.
● Caching and CDN
Vercel’s global CDN and edge network ensure that your application’s static assets
and server-rendered pages are served quickly and efficiently to users around the
world. To further optimize caching, consider using the Cache-Control header in your
serverless functions to control how long assets are cached on the client and CDN.
// Set the Cache-Control header
res.setHeader('Cache-Control', 'public, max-age=3600,
s-maxage=86400');

res.json({ data: 'Your data here' });
}
By following these best practices and leveraging the powerful features of NextJS and
Vercel, you can optimize the performance and scalability of your serverless
application, ensuring a fast and responsive user experience for your audience.
Monitoring and Analytics
Keeping track of your application’s performance and user engagement is crucial for
maintaining a high-quality user experience and making data-driven decisions. In this
section, we’ll discuss the tools and techniques available for monitoring and analyzing
your NextJS serverless application deployed on Vercel.
● Vercel Analytics
Vercel provides built-in real-time analytics for your projects, giving you insights into
key performance metrics such as load times, cache hit rates, and device usage. To
access Vercel Analytics, visit your project’s dashboard on the Vercel website and click
on the “Analytics” tab.
● Custom Logging
You can add custom logging to your serverless functions to track events, errors, or
other data points relevant to your application. Logs generated by your serverless
functions can be viewed in the deployment logs provided by Vercel. To add custom

logging, simply use the console.log, console.error, or other console methods within
your serverless function:
console.log('A custom log message');
res.json({ data: 'Your data here' });
}
● Third-Party Monitoring and Analytics Tools
In addition to Vercel’s built-in analytics, you can also integrate third-party
monitoring and analytics tools with your NextJS application, such as Google
Analytics, LogRocket, or Sentry. These tools can provide additional insights into user
behavior, error tracking, and application performance. To integrate a third-party
tool, follow the specific integration instructions provided by the tool’s
documentation.
● Performance Audits
Regularly auditing your application’s performance using tools like Google Lighthouse
or WebPageTest can help you identify areas for improvement and ensure your
application remains fast and responsive. These tools provide detailed reports on
various performance metrics, including load times, accessibility, and best practices.

By leveraging Vercel’s built-in analytics, adding custom logging, and integrating
third-party monitoring and analytics tools, you can gain valuable insights into your
serverless application’s performance and user engagement. Regularly auditing your
application and using these insights to guide your development process can help you
maintain a high-quality user experience and stay ahead of the competition.
Conclusion
In this blog, we’ve explored the powerful combination of NextJS and Vercel for
building and deploying serverless applications. By leveraging the features and
benefits of both technologies, you can create highly performant, scalable, and
accessible applications that deliver an exceptional user experience.
Key Takeaways:
● Introduction to NextJS and Vercel, their unique features, and how they
complement each other in serverless application development.
● Getting started with NextJS and Vercel, including project setup, installation,
and basic configuration.
● Building a serverless application with NextJS, using its features like static site
generation, dynamic imports, and API routes.
● Deploying your application with Vercel, with insights into custom domains,
environment variables, and deployment logs.
● Utilizing Vercel’s serverless functions to add server-side functionality to your
NextJS application.
● Optimizing performance and scalability with techniques such as Incremental
Static Regeneration, image optimization, code splitting, and caching.
● Monitoring and analyzing your application’s performance using Vercel’s
built-in analytics, custom logging, third-party tools, and performance audits.

By following the best practices and techniques discussed in this blog, you can build
and deploy serverless applications that are not only fast and scalable but also easy
to maintain and monitor. Whether you’re a solo developer or working with a Next JS
development company, embracing the serverless architecture with NextJS and
Vercel will empower you to create modern, user-centric applications that stand out
in today’s competitive digital landscape.

Building and Deploying Serverless Applications with NextJS and Vercel.pdf

Recommended

Recommended

More Related Content

Similar to Building and Deploying Serverless Applications with NextJS and Vercel.pdf

Similar to Building and Deploying Serverless Applications with NextJS and Vercel.pdf (20)

More from RajasreePothula3

More from RajasreePothula3 (14)

Recently uploaded

Recently uploaded (20)

Building and Deploying Serverless Applications with NextJS and Vercel.pdf