Project architecture

All non proc-macro related code is in /packages/sycamore. Proc-macro related code is in /packages/sycamore-macro.

Directory structure

• Reactivity

  • All the reactivity primitives are defined in live in the sycamore-reactive crate.

• GenericNode

  • GenericNode is a trait that serves as an abstraction for different rendering backends. Most commonly used types are DomNode for rendering in the browser to DOM nodes and SsrNode for rendering on the server to static HTML.

  • The sycamore::utils::render module contains backend agnostic utilities for rendering nodes.

• View

  • View is a wrapper type around a GenericNode that is produced by the view! macro. A View can be rendered using the utilities in sycamore::utils::render.

• view!

  • The view macro is defined in /packages/sycamore-macro/src/lib.rs.

  • trybuild is used for testing proc-macros.

Fragment diffing

View fragments are diffed in the sycamore::utils::render::reconcile_fragments(_) method.

The diffing done by Keyed and Indexed is independent of the diffing done when rendering fragments. Learn more about this in Iteration.