svelte

Expert guidance for building reactive, compiled web interfaces with Svelte 5.

Core Concepts

Fundamental building blocks of Svelte applications.

See components-and-files.md for:

• .svelte file structure
• <script>, <script module>, and <style> blocks
• Component compilation and optimization

See what-are-runes.md for:

• What runes are and how they differ from normal functions
• Rune syntax and usage patterns
• Migration from Svelte 4 reactivity

State and Reactivity