# Svelte
Confidence: high
Last verified: 2026-05-22
Generation: human_only


## TL;DR

Svelte (Rich Harris, 2016) is a radical frontend framework that compiles components to vanilla JavaScript during build — no virtual DOM runtime. Svelte 5 (2024) introduced runes ($state, $derived, $effect) for universal reactivity. Smaller bundles, faster runtime — used by Apple, Spotify, NYT.

## Core Explanation

Compile-time approach: framework code is compiled away — output is pure JS. Stores (Svelte 4) → Runes (Svelte 5): `let count = $state(0)`. SvelteKit: full-stack framework like Next.js — file-based routing, SSR, API routes, adapters for deployment. `{#each}`, `{#if}`, `{#await}` template syntax. Reactive declarations: `$: doubled = count * 2` (Svelte 4).

## Further Reading

- [Svelte Documentation](https://svelte.dev/docs/)