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Svelte vs Next JS: A Comprehensive Comparison for Developers




Are you trying to decide between using Svelte vs Next JS for your next web project? Look no further, because I’ve got you covered.

In this post, I’ll provide a side-by-side comparison of these two highly renowned JavaScript frameworks to help you make an informed choice that works best for your specific needs.

Recently gaining the spotlight for focusing on performance and simplifying development efforts, Svelte is an innovative framework that enables developers to generate lightning-speed web apps with minimal code.

On the contrary, Next.js has been a popular choice over time as it offers handy features such as server-side rendering, lazy loading, and code splitting which makes building websites more efficient.

We will be exploring the details of both Svelte and Next JS. We’ll cover their key features, advantages/disadvantages, and potential applications. So let’s dive into it!

Overviews of Svelte and Next JS

Svelte Logo
Rich Harris, MIT, via Wikimedia Commons

In 2016, Rich Harris of The New York Times launched Svelte, a novel JavaScript framework. Unlike other frameworks and libraries that implement virtual DOMs such as React, Angular, and Vue, this one relies on the compilation at build time to deliver small bundle sizes and enhanced runtime performance. Svelte is an outstanding option for developers seeking out fast results with minimal effort.

Next.js Logo
Kipper69, CC BY-SA 4.0, via Wikimedia Commons

On the other hand, Next JS has existed since 2015 and was developed by Zeit – a company well-known for its cloud platform and developer tools. This framework is built upon React, which facilitates you to construct server-rendered React applications with optimized performance along with automatic code-splitting.

Svelte is renowned for its main features and capabilities with a sharp focus on performance and minimalism. It gives you the power to create lightweight web applications with only a few lines of code, thanks to its method of transforming components into plain JavaScript when building the application.

In comparison, Next JS is known for its sophisticated features in server-side rendering, code-splitting, and lazy loading.

Furthermore, both frameworks include routing and state management options along with a diversity of deployment and hosting solutions. As such, you can craft optimal web applications that feature high performance as well as effortless scalability.


Comparison of Key Features

Performance and speed

Svelte’s emphasis on performance makes it a standout compared to other frameworks. By compiling components into JavaScript at build time, Svelte skips the need for virtual DOMs and reduces browser processing during runtime. It not only results in faster loading time but also produces a great user experience.

In contrast to Svelte, Next JS employs a virtual DOM for rendering which can slow down the runtime performance. Despite this drawback, it does provide many optimization features such as code-splitting and lazy loading that make large applications faster and more effective.

Server-side rendering

By using the server-side rendering technique, Svelte and Next JS apps can create the initial HTML on the server instead of in the browser. This has tremendous advantages – it boosts web application performance by decreasing the work on the client’s browser, particularly in cases of slow devices or unreliable network connectivity.

Nevertheless, Next JS is specifically designed for server-side rendering and offers a range of features to make it easy for developers to build server-rendered React applications. Svelte also offers support for server-side rendering; however, compared to Next JS, it requires more setup and configuration.

Code-splitting and lazy loading

Both Svelte and Next JS allow you to split up your code into smaller parts, lazy loading only the components needed at a certain time. This maximizes performance by reducing initial loading time and improving the interactive experience for users.

Next.js makes it effortless for developers to take advantage of code-splitting and lazy loading, while Svelte requires a bit more manual setup to properly configure these features.


With Svelte and Next JS, you can easily define numerous paths and routes within your application while managing page navigation.

Svelte provides a built-in router that is easy to use and includes features such as route-level code-splitting and lazy loading.

Similarly, Next JS’s built-in router based on React Router library provides several features to help you create effective routes in no time.

State management

When developing an application, state management is vital for organizing and handling data. Luckily, both Svelte and Next JS have us covered.

Svelte offers a built-in store that uses reactive data to automatically update the component tree when changes are made.

On the other hand, while Next JS doesn’t have its built-in solution, it can be easily integrated with popular libraries like Redux or MobX to manage states efficiently.

Deployment and hosting options

No matter which of the two you decide to use, Svelte and Next JS have a variety of deployment and hosting solutions at your disposal. These incorporate traditional server hosting, static site hosting, and cloud platforms.

Svelte has its built-in tool for building and deploying static sites quickly. On the other hand, Next JS offers a range of integrations and optimizations for deploying to Vercel.

In case none of these suit your needs or preferences – no worries – as both frameworks let you host applications on any platform or infrastructure you want.


Pros and Cons

Advantages of using Svelte

  • Focus on performance: Svelte’s process of transforming components into plain JavaScript at the build phase can result in faster runtime execution and smaller bundle sizes when compared to frameworks that rely on a virtual DOM.
  • Minimalism: With its simplified architecture, Svelte offers developers a lightweight way to build web apps with fewer lines of code – making it an accessible and easy-to-learn alternative compared to other frameworks.
  • Reactive data model: By leveraging Svelte’s built-in store, you can effortlessly manage and update your application’s state using the reactive data model. With this approach, components will automatically synchronize when any changes occur to ensure that everything is up to date.

Disadvantages of using Svelte

  • Limited ecosystem: Since Svelte is a relatively new framework, it has a smaller ecosystem compared to other frameworks such as React or Angular. This can make it harder to find solutions and integrations for Svelte projects.
  • Server-side rendering requires manual setup: Compared to Next JS, which was crafted with server-side rendering in mind, Svelte requires more setup and configuration for similar results.

Advantages of using Next JS

  • Built-in server-side rendering: Next JS is created with the intent of making server-side rendering simple and easy for developers to create React applications. It’s inclusive of helpful features that make it an ideal choice for this purpose.
  • Automatic code-splitting and lazy loading: With its automated code-splitting and lazy loading, Next JS facilitates the optimization of even large and complicated applications without entailing any manual settings.
  • Wide ecosystem: Next JS is built on top of React, which means that it has access to the vast ecosystem of React libraries and tools. This makes it easier for developers to find solutions and integrations for their Next JS projects.

Disadvantages of using Next JS

  • Slower runtime performance: Although Next JS utilizes a virtual DOM for its rendering, it can lead to slower runtime performance when compared with Svelte.
  • Larger bundle sizes: Next JS’s automatic code-splitting and lazy loading can result in smaller initial bundle sizes, but they may not be as efficient at reducing overall bundle size compared to the Svelte framework.


Use Cases

Types of projects that are well-suited for Svelte

  • Projects that require high performance: If you need a web application that prioritizes speed and agility, Svelte is an excellent choice. Perfect for single-page applications or mobile apps (with Svelte Native), this lightweight framework offers optimal performance while still providing the functionality you need.
  • Projects with a small team or limited resources: With its straightforward architecture, Svelte is not only simple to comprehend and apply for small teams or inexperienced developers in the front-end site, but also significantly reduces development time.
  • Projects with simple or moderate complexity: Svelte’s reactive data model and integrated store can make it a breeze to organize states in Svelte applications, particularly for projects that aren’t overly intricate.

Types of projects that are well-suited for Next JS

  • Projects with complex or large-scale requirements: With its automatic server-side rendering and code-splitting, Next JS simplifies the process of constructing and scaling vast, intricate applications.
  • Projects that require integration with the React ecosystem: With boasting access to React’s libraries and tools, Next JS is the perfect selection for projects seeking seamless integration with the cutting-edge React ecosystem.
  • Projects that require easy deployment and hosting: If you need an effortless deployment and hosting solution, then Next JS is your go-to. It offers a wide range of hosting options from classic server-based to static site, as well as cloud platforms like Vercel; hence making it a perfect fit for projects that require easy deployment and hosting.


Svelte vs Next JS: Conclusion

In this blog post, we discussed Svelte and Next JS – two great JavaScript frameworks used to create web applications. We weighed their features, benefits and drawbacks, and the use cases they are best suited for.

When deciding between Svelte and Next JS for building web applications, you should take the project’s specific needs into consideration. Critical criteria such as performance, scalability, the complexity of the application, resources available to your team size, and integration with other ecosystems must be carefully evaluated before settling on a framework. By doing so, you can make an informed decision that will best satisfy your requirements.

In summary, Svelte is an ideal framework for projects that prioritize speed and efficiency. On the other hand, if your project requires sophisticated integrations or your project entails complex operations, then Next JS should be your go-to choice as it allows you to leverage React’s capabilities. Both frameworks offer powerful solutions for developing web applications.

If you’re interested in learning more about different options for building web applications with React, be sure to check out our other blog posts on:

Thanks for reading!



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