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Sapper notes for developers

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01 · Sapper

Routing, SSR & Data Loading (Legacy)

Sapper: Routing, SSR & Data Loading (Legacy). ⚠ Sapper is deprecated and fully superseded by SvelteKit. Do not start a new project with it. This page exists for maintaining or migrating an existing Sapper codebase, and f…

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02 · Sapper

Build Tooling & Migrating to SvelteKit

Sapper: Build Tooling & Migrating to SvelteKit. SSR + Hydration + Code-Splitting. SSR: pages render to HTML on the server for the initial request -- faster first paint, better SEO than a blank-until-JS-loads client-only …

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Reactfrontend

Zustand

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Apr 2, 2026
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