Client-side Routing without the JavaScript

Ryan Carniato details how SolidJS achieved client-side routing with minimal JavaScript through a combination of partial hydration, recursive Islands, and server-rendered HTML partials. The approach uses Solid's hierarchical hydration IDs and a NoHydration component to isolate server-only content, while a tiny event-delegation-based router fetches and swaps only the changed nested route segments via AJAX. A micromorph-based DOM diffing step preserves client state during refreshes. The result is a SPA-like experience with as little as ~5-13kb of JavaScript, dramatically less than Next.js, Nuxt, Angular, SvelteKit, or Lit equivalents.