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ReactvsSvelte
What is the difference between React and Svelte?
Updated 3 min read8 differences
In short
React updates the page at runtime by comparing a virtual DOM, while Svelte compiles components ahead of time into code that updates the DOM directly.
React
React is an open-source JavaScript library for building user interfaces from reusable components that update automatically when their data changes.
Read the page on ReactSvelte
Svelte is a front-end framework that compiles components into small, efficient JavaScript at build time instead of running a large framework in the browser.
Read the page on SvelteReact and Svelte compared
| Aspect | React | Svelte |
|---|---|---|
| Type | A UI library for components | A compiler-based component framework |
| How updates work | Re-runs components and compares a virtual DOM at runtime | Compiled code updates the affected DOM nodes directly |
| Component syntax | JSX inside JavaScript or TypeScript functions | .svelte files with a script, HTML-like markup and styles |
| State | Hooks such as useState, changed through setter functions | Runes such as $state; a plain assignment updates the page |
| Bundle size | Larger baseline, since the React runtime always ships | Small baseline that grows with each component |
| Full-stack framework | Next.js, React Router and others | SvelteKit, the official framework |
| Ecosystem and jobs | The largest of any front-end tool | Smaller, but active and growing |
| Mobile apps | React Native renders native iOS and Android views | No official native counterpart; usually wrapped in a web view |
The difference, explained
React, created at Facebook and released in 2013, is a JavaScript library for building interfaces from components written in JSX. Svelte, created by Rich Harris and first released in 2016, is a component framework with its own .svelte file format. Both build user interfaces from reusable components, but they do the work at different times.
React works in the browser: when state changes, it runs the component function again, compares the new virtual DOM with the old one and applies the differences. Svelte does most of its work at build time: its compiler turns each component into plain JavaScript that updates exactly the DOM nodes that depend on the changed data. That is why Svelte apps usually ship less JavaScript, and why Svelte components need less code, with no setter functions or dependency lists.
The trade-off is ecosystem size. React has far more libraries, tutorials, jobs and developers, plus React Native for mobile apps and frameworks such as Next.js. Svelte has a smaller but active community, and SvelteKit is its official framework for routing, server rendering and deployment. Since Svelte 5, state is declared with runes such as $state and $derived, a model built on signals.
A common misconception is that Svelte has no runtime and that React is slow. Svelte still ships a small runtime, and its compiled output grows with every component, so the size advantage narrows in very large apps. React is fast enough for most interfaces, and the React Compiler can now add memoization automatically. The better choice usually depends on the team and the libraries you need more than on raw speed.
Which one should you use?
Choose React when…
- You want the largest pool of libraries, answers and developers to hire.
- You also plan a mobile app and want to reuse skills with React Native.
- Your team already knows React or builds on Next.js.
Choose Svelte when…
- You want small bundles and fast loading with little tuning.
- You prefer components that stay close to plain HTML, CSS and JavaScript.
- The app is a widget, dashboard or site where load time matters most.
Readers ask
Is Svelte faster than React?
In many benchmarks, yes: compiled updates and smaller bundles make Svelte quicker to load and update. In real apps both are usually fast enough, and the gap depends more on how the app is written.
Should I learn React or Svelte first?
React, if the goal is a job, since far more companies use it. Svelte is often easier to start with, and the component ideas carry over in both directions.