Svelte Vs React 2021 : Which JS Framework your Project Requires?

Krunal Shah

Sep 15, 2021

5 min readLast Updated Mar 22, 2022

The realm of web application development technologies is constantly evolving with the proliferation of time. With the evolution, there has been a constant tussle between two leading platforms to prove who’s better in performance comparison. And the story of Svelte Vs React is no different.

Being JavaScript frameworks, both React and Svelte have their perks of their own. Thus, it is like the ‘clash of the titans’ as far as app development frameworks are concerned.

ReactJS over the past years has had its authority when it comes to JavaScript libraries. But over the past few months, Svelte js has risen as an effective alternative and has caught the eye balls of the tech realm. Although Svelte js is similar to React but has a different approach of handling the web pages in its development phase.

Thus, in this blog, we will compare Svelte Vs React on different parameters and will understand which one is better. In addition, we will also look at some of the salient features of both the frameworks. So without any further ado, let us get the ball rolling.

Also Read: How To Choose A Technology Stack For Web Application Development

An overview of React

React.js is known for its flexibility as it is an open-source JavaScript library. So if you are looking to build complex and light-weight business applications, React.js is the best platform for your business. In addition to flexibility, the platform allows quick rendering of pages making the web-pages SEO friendly.

Because of such amazing benefits; leading business organizations like Facebook, Netflix, PayPal, Twitter, etc. use Reactjs extensively. In addition, the other use cases of ReactJs are:

·         Desktop apps (React+Electron.js)

·         Progressive web apps (React+Ionic)

·         Software-as-a-service-tools

Also Read: Top 10 Famous Websites Built with React JS in 2021

An overview of Svelte

Svelte converts and compiles UI components into highly efficient code that updates the DOM. With DOM, it is easier for the developers to build intuitive UI interfaces. So as a far as performance comparison is concerned, Svelte has excellent performance characteristics.

Just like React.js, Svelte is also the first choice of many leading business organizations. The list includes names such as Houses of World, TeamSpeak, Tableplop, etc. In addition, the framework has interactive visualization so it is used in apps that require data visualization through video.

Comparison Between Svelte Vs React

After taking a glance at React and Svelte, let us dive deep and understand Svelte Vs React thoroughly.


Reactjs enhances the performance as it allows building with reusable components. Thus, with reduced code clutter it is easier to gain consistency in the app development cycle. Moreover, it platform employs optimized coding practices that enhances the user experience along with app’s performance.

Svelte on the other hand minimizes the runtime overload which leads to faster interface navigation. It also offers flexibility so that the developers could produce high-quality codes. Besides this, as an IT business owner, you don’t have to worry about the complexities that surround Virtual DOM overhead. Thus, apps developed through Svelte are powerful and sophisticated.

Also Read: Does Your Web Application Need A Front-End Framework?

User experience

For user experience comparison of Svelte Vs React; React is an ultra-fast application and it boosts the loading speed. As the web pages load fast, it increases the user experience. With an increased user experience, there are high chances of increasing the loyalty of your customers towards the brands. Thus, using React will create a win-win situation for you as a CTO.

Svelte supports component-based UI design and thus is exceptional in building lightweight apps. The page speed also increases as Svelte removes the middle-stage loading of virtual DOM. With enhanced user experience, the platform also increases the response time.

Code maintainability

As React is a component based architecture, it focuses on customizing the UI and develops functional and individual code snippets.  These code snippets can then be used in other apps of different modules as well.

As the codes can be used elsewhere, this app breakdown enhances the team’s productivity and efficiency. Moreover, as an IT business owner, you don’t have to worry about orienting a new developer.  The React platform itself has such organized coding patterns and components that makes the code easy to learn. Since the developers can feel at home with React, it increased the code maintainability.

The components of Svelte have a readable structure that helps in defining different app components. So along with acting in performance comparison, the platform helps the developers to maintain the code as well. With Svelte, different pieces of a web application like buttons, forms, etc. work together easily.

App size

As an IT business owner, you need to understand that Reactjs is a fully featured frontend framework. Thus, it is easier to build bigger and more complex applications using React. Moreover, with the latest development, it is easier to reduce the app size by 30% using React JS.

Svelte is widely used in creating small-sized applications. Thus, it is the most accessible JavaScript component library and it runs the development process in a better way.

Faster development

React has a reputation of being the fastest framework. Thus in the race of Svelte Vs React, React has some edge. All you need is a team of developers who are familiar with the basic JavaScript concepts. Once you know this along with configuration caveats, etc. the speed of development increases.

With Svelte, the developers can develop more advanced features easily. In addition, they can separate the app structure and the design HTML markup. The framework here has a superlative data structure and design functionality also. Moreover, with the clear separation of front-end control and functioning, it is easier for the developers to have faster development.


To facilitate the test process, Reactjs offers test runners. Thus, it helps the QA team to find the problem in real browser settings.  In addition, this reduces the time-to-market of the app, increasing the overall app productivity.

The developers can conduct unit testing with the Svelte testing library. The library is smaller in size and has less complex computations. Moreover, if in Svelte Vs React, you are looking for ‘lean web’, Svelte should be your choice.


With such emphatic perks, there is no doubt about the fact that the debate of Svelte Vs React will go on. It is now up to the CTOs to understand their business requirements and choose the platform. Both React and Svelte have their share of perks and perils but everything depends on the nature of the app. Both the frameworks are component based and are known for enhancing the user experience. Thus, be certain in your choices before selecting the framework.

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Krunal Shah

Krunal Shah is the CTO and Co-founder at Third Rock Techkno. With extensive experience gained over a decade, Krunal helps his clients build software solutions that stand out in the industry and are lighter on the pocket.

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