Install the toolchain
Rust, the wasm32-unknown-unknown target, and either Vite (CSR) or cargo-leptos (SSR). Exact commands for both on the Install page.
Docs
Getting started
Three real steps, the same ones this site's own build uses: build the toolchain, write a .kitty file, compile it to Rust.
Write a .kitty file
A component is a func that returns JSX-like markup. Signals (<{name}> >> value) declare and mutate reactive state in one construct.
Compile and run
kittine-compiler build src/App.kitty emits real Leptos 0.7 Rust, following every import it finds. Then cargo/wasm-bindgen/cargo-leptos take over — the exact same pipeline shown on the Rust & Leptos page.
A first component
Real, current syntax — not simplified for the example.
func Hello() {
<{name}> >> "World"
return (
<div>
"Hello, "
<{name}>
"!"
</div>
)
}<{name}> >> "World" declares a reactive Word signal the first time it's written; a bare <{name}> inside return ( ... ) reads it reactively. No separate let vs. set keyword, and no #w type tag needed here — type inference fills it in from the "World" literal.