Svelte Js Vs React

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Are you on the fence in the Svelte vs React debate? You’re not the only one. Nowadays, picking the best tool is a challenge, especially with all the conflicting voices screaming on the internet. We’re constantly attacked by headlines such as:. Svelte was dead before its development. And then we see:.

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React will shape the future. Svelte is the future. In this article, we don’t want to side with one party or the other. Instead, we want to show when those tools are applicable and which circumstances make them shine bright like a diamond.


Remember that so far, there are no universal tools available that can solve every problem. So don’t choose the technology that’s trendy: choose the one that’ll solve your problem in the most efficient way.

What i dislike in Svelte 💔

React, being a much favored technology at MPC, has been already discussed several times. We’ve explained what is React in the first place, why React is a good choice, and how it differs from React Native. But let me give you a small reminder:. React is a JavaScript library dedicated to front–end development, specifically for building user interfaces made of reusable components.

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It was created by Facebook (original author: Jordan Walke) in 2011 for their own use and is maintained by them to this day. It was made open–sourced two years later and it quickly gained popularity. It’s particularly well–known for being fairly easy to learn, its extremely fast development, and a giant community of ready–to–help developers.

What is React?

One of its most famous features is Virtual DOM, which enhances performance of React apps. Svelte is one of the newest kids on the block. It was released in 2016, after analyzing its predecessors — React and Vue in particular. It was created by Rich Harris and is currently being maintained by Svelte core members.


It’s used by the following companies: The New York Times, Avast, Spotify, Semrush, and Chess. On its official website, Svelte is described as a component framework, but it resembles a compiler.

Production Build Comparison

It generates as small plain JavaScript code as possible to make the Svelte apps tiny and fast. It also ensures proper optimization.

  • Svelte is doing pretty well for itself, when it comes to its popularity. In the State of JS 2020 Survey, 86% of developers expressed their satisfaction in working with Svelte. In the more recent survey prepared by Stack Overflow in 2021, Svelte was chosen as the most loved framework by 71.42% of respondents — getting ahead of React (69.28%) and Vue (64.41%).
  • But in general, Svelte is used less commonly than the other frameworks, so keep that in mind while looking at these numbers. Rich Harris is a creator of Ractive, a template–driven UI library developed with highly interactive apps in mind.
  • It was originally created for The Guardian. But Harris wasn’t exactly happy with that product. It didn’t solve one crucial problem — the high cost of shipping Javascript, which heavily influenced mobile users. To deal with that, Harris came up with an idea for a framework–like–compiler, which lessens the overhead code needed by Svelte apps.
  • In this regard, Svelte dominates not only over React, but also over Angular and Vue. In all the tests — including speed test, startup test, and memory test — Svelte is a clear winner. Where does that blazing fast performance come from?

Strengths and Weaknesses of React and Svelte

What gives Svelte such a significant edge is that it interprets the application code during build–time, instead of runtime. Additionally, because HTML, CSS, and JavaScript get compiled into tiny, highly–optimized bundles, the Svelte app receives business logic only.

  • Other frameworks are forced to ship overhead framework code and force the browser to do the heavy–lifting, which slows everything down. What also improves the performance is the lack of the Virtual DOM, surprisingly. Virtual DOM is the winning card of React and one of its most important features, responsible for improved performance.
  • It was so good it heavily inspired Vue. That’s why it was very bold of Svelte to discard it. But first, what is Virtual DOM? It’s a virtual representation of the Document Object Model that serves as temporary memory storage for all the changes brought to the user interface.
  • With the real DOM, each change would trigger an update, slowing down the web apps. Virtual DOM, on the other hand, delays that process until it finds the most efficient way to update and render the real DOM — which is also called the reconciliation process or diffing.
  • Svelte disagreed that only with virtual DOM you can achieve great performance, and it managed to prove it. Diffing, while it can be effective, still requires a lot of work. So Svelte decided to skip that altogether. When does the DOM get updated with Svelte?


Whenever the state of the web applicationschanges due to the user’s input, for example. It’s an automated process that makes Svelte truly reactive. React isn’t fully reactive, although it tries to be. It certainly is declarative, meaning that instead of describing each step to reach a certain result, developers only need to describe the outcome.

Brief information about ReactJS

React handles the rest. But if there are any changes of values, they won’t be automatically reflected in the DOM. React updates the components according to schedule. Without using this.setState or hooks, React won’t… well, react properly. The thing is, Svelte also does a similar thing.

Further readings

It does update the DOM once a component’s stage changes, but only when it’s triggered by assignments. Until that point, all the changes are batched together. But there are also reactive declarations and variables to consider. Reactive declarations are responsible for automatically recomputing logic during each update.

Brief information about Svelte

And reactive variables, once declared and changed, trigger other variables to change, if they’re related. It’s laughably easy to do, too — just by adding a dollar sign. So is Svelte truly reactive? Probably as much as serverless doesn’t have any servers. Compared to React, reactivity is achieved easier, but similar things can be done with both technologies.

Test the apps

The way Svelte uses components (created in Svelte by making .svelte files)also differs from React. First of all, you don’t have to do anything toexport components — Svelte exports them on its own, automatically.

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With React, you had to do that manually. Also, Svelte offers flexible styling, which is possible due to components being scoped in their style tags. And you don’t have to bother with writing unique classes, since Svelte generates them during the compile step.

What is Svelte?

So worry about conflicts no more. There are also some similarities — for example, passing data to child components and emitting data back to parents components may seem familiar. React, being a very lightweight library focused on the view layer only, requires third–party tools for things like state management or to create amazing animations.

Key Takeaways

This is not necessarily a bad thing — for small projects with little features, it might actually be perfect. Still, it’s worth noting that Svelte has built–in effects, transitions, and animations that won’t increase the size of your app — which is a direct result of code compilation.

Difference Between Svelte vs React

Svelte loads only the needed parts. Svelte also has several ways of dealing with state management. Context API: when your components need to communicate and pass data around,. Svelte Stores: when your components need to communicate without passing too much data,.

Some code comparisons

Writable Stores: when you want to make objects accessible for different components,. Readable Stores: when you don’t want the user to manipulate the data. The GZipped version of React is 42.2KB (including ReactDOM).

React vs Svelte – A Technical Comparison

The GZipped version of Svelte is1.6KB. In this regard, Svelte is the undeniable winner. Because of its size, the web application loads faster, the responsiveness is flawless, and the bandwidth costs are lowered. React’s development pace is fast. So fast it’s hard to keep up at times, which is often cited as one of its disadvantages.

Build the App component

Svelte’s development process is even faster. How’s that possible? The generated code is more readable, simpler, and way shorter than React’s. You can achieve similar results with less code, without the fear of compromising the quality.


This in turn means that the project is easy to maintain and even easier to debug. And if there are any new team members added to the Svelte project, they can quickly understand what’s happening and start working immediately.

  • The learning curve of both technologies is considered fairly easy. They both require a knowledge of HTML, CSS, and JavaScript. But Svelte once again managed to outdo React. In React, one of the hurdles is JSX, an XML–like syntax to JavaScript meant for building user interfaces.
  • Svelte uses an easier syntax and it has its own templating language that’s effortless to grasp. Svelte might seem wonderful — it’s easy and makes the development experience a breeze — but it’s still behind React in terms of popularity and usage. The biggest disadvantages of Svelte are:. Because React is so popular, as proven by the influx of React apps, it has a giant community of passionate developers who make all sorts of tutorials and guides (often for free), and are readily available for brainstorming sessions.
  • There’s also an abundance of tools for facilitating the development process, like React Developer Tools or Redux DevTools, which goes hand in hand with Redux. Svelte can’t count on the same level of community support. The lack of plugins, integrations, and IDE support is particularly bothersome.
  • There are very few fixed best practices that could serve as a guide. And if you stumble upon a problem, the small user base might not be able to help you out. Doesn’t seem like a big deal? Well, it might be.

Svelte vs. React

React is supported and maintained by Facebook, who uses it for its own purposes. They have the necessary funds to keep working on it.

  • Moreover, there’s no fear that Facebook will suddenly switch to Angular, which is supported by Google. This makes React pretty much future–proof. Svelte’s future isn’t as clear–cut. It’s being maintained by the community, but who knows how long their enthusiasm will last.
  • It’s possible that Svelte will inspire another new technology that will take its place. Svelte just recently matured enough for enterprise–scale applications. This means that there are not too many use cases of Svelte in the wild.
  • Only recently Radio France added Svelte to their tech stack, just like Scott Tolinski used it for his Level Up Tutorials platform. So far, other technologies are preferred by influential players, and so Svelte remains to be battle–tested. Its future, while hopeful, remains unknown.
  • Svelte offers a lot. Praised for its size, highly efficient imperative code, as well as blazing–fast performance, Svelte might seem like a serious competitor to technologies like React or Angular. Unfortunately, Svelte still has a long way to go. So far, it’s best to use for building single–page–applicationsfor those with lower internet connection or simple personal websites like blogs or portfolios.


It’s definitely not replacing other frameworks in bigger companies’ tech stack, and Svelte developers are in very little demand. For all its advantages, Svelte’s time to shine is yet to come. Look out, React!

Can You Really Use Svelte in a Web Project? Where Can You Use React?

But don’t worry. For now, your crown stays in place. Download this free ebook to understand the ins and outs of software development outsourcing and use its tips to get ahead of your competition. 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.

What i like in Svelte ❤️

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.

React vs Svelte – The Verdict

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.

What is Svelte?

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.

Build the Button component

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. Svelte converts and compiles UI components into highly efficient code that updates the DOM.

So is Svelte better than React?

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.


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.

Build the Heading component

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.

Comparison of React and Svelte

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.

Which Framework to Choose? Svelte or React?

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.

An overview of Svelte
Moreover, as an IT business owner, you don’t have to worry about orienting a new developer.

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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.
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.
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.