Svelte

Svelte is a modern JavaScript framework for building user interfaces that takes a fundamentally different approach from frameworks like React or Vue by compiling components at build time rather than interpreting them at runtime. This compilation step produces highly optimized vanilla JavaScript that directly manipulates the DOM, resulting in smaller bundle sizes and better runtime performance. Svelte components are written in single-file components using a superset of HTML with built-in reactivity, eliminating the need for complex state management libraries for many use cases. The framework includes built-in state management, scoped styling, and animations without requiring additional dependencies. Svelte's reactivity system automatically updates the DOM when component state changes, using compile-time analysis to determine dependencies rather than virtual DOM diffing. SvelteKit, the official application framework, provides routing, server-side rendering, and build optimization for production Svelte applications. Svelte has gained popularity for its developer experience, performance characteristics, and reduced bundle sizes compared to other modern frameworks.