325 lines
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<main>
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<h1 id="adr-003-leptos-csr-only-para-frontend"><a class="header" href="#adr-003-leptos-csr-only-para-frontend">ADR-003: Leptos CSR-Only para Frontend</a></h1>
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<p><strong>Status</strong>: Accepted | Implemented
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<strong>Date</strong>: 2024-11-01
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<strong>Deciders</strong>: Frontend Architecture Team
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<strong>Technical Story</strong>: Selecting WASM framework for client-side Kanban board UI</p>
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<hr />
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<h2 id="decision"><a class="header" href="#decision">Decision</a></h2>
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<p>Usar <strong>Leptos 0.8.12 en modo Client-Side Rendering (CSR)</strong> para frontend WASM, sin SSR.</p>
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<hr />
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<h2 id="rationale"><a class="header" href="#rationale">Rationale</a></h2>
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<ol>
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<li><strong>Fine-Grained Reactivity</strong>: Similar to SolidJS (not virtual DOM), updates only affected nodes</li>
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<li><strong>WASM Performance</strong>: Compiles to optimized WebAssembly</li>
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<li><strong>Deployment Simplicity</strong>: CSR = static files + API, no server-side rendering complexity</li>
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<li><strong>VAPORA is a Platform</strong>: Not a content site, so no SEO requirement</li>
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</ol>
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<hr />
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<h2 id="alternatives-considered"><a class="header" href="#alternatives-considered">Alternatives Considered</a></h2>
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<h3 id="-yew"><a class="header" href="#-yew">❌ Yew</a></h3>
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<ul>
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<li>Virtual DOM model (slower updates)</li>
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<li>Larger bundle size</li>
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</ul>
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<h3 id="-dioxus"><a class="header" href="#-dioxus">❌ Dioxus</a></h3>
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<ul>
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<li>Promising but less mature ecosystem</li>
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</ul>
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<h3 id="-leptos-csr-chosen"><a class="header" href="#-leptos-csr-chosen">✅ Leptos CSR (CHOSEN)</a></h3>
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<ul>
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<li>Fine-grained reactivity, excellent performance</li>
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<li>No SEO needed for platform</li>
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</ul>
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<hr />
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<h2 id="trade-offs"><a class="header" href="#trade-offs">Trade-offs</a></h2>
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<p><strong>Pros</strong>:</p>
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<ul>
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<li>✅ Excellent WASM performance</li>
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<li>✅ Simple deployment (static files)</li>
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<li>✅ UnoCSS integration for glassmorphism styling</li>
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<li>✅ Strong type safety in templates</li>
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</ul>
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<p><strong>Cons</strong>:</p>
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<ul>
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<li>⚠️ No SEO (not applicable for platform)</li>
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<li>⚠️ Smaller ecosystem than React/Vue</li>
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<li>⚠️ Leptos SSR available but adds complexity</li>
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</ul>
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<hr />
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<h2 id="implementation"><a class="header" href="#implementation">Implementation</a></h2>
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<p><strong>Leptos Component Example</strong>:</p>
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<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>#[component]
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fn ProjectBoard() -> impl IntoView {
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let (projects, set_projects) = create_signal(vec![]);
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view! {
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<div class="grid grid-cols-3 gap-4">
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<For each=projects key=|p| p.id let:project>
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<ProjectCard project />
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</For>
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</div>
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}
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}
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<span class="boring">}</span></code></pre></pre>
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<p><strong>Key Files</strong>:</p>
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<ul>
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<li><code>/crates/vapora-frontend/src/main.rs</code> (app root)</li>
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<li><code>/crates/vapora-frontend/src/pages/</code> (page components)</li>
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<li><code>/crates/vapora-frontend/Cargo.toml</code> (dependencies)</li>
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</ul>
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<hr />
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<h2 id="verification"><a class="header" href="#verification">Verification</a></h2>
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<pre><code class="language-bash"># Build WASM
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trunk build --release
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# Serve and test
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trunk serve
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# Check bundle size
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ls -lh dist/index_*.wasm
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</code></pre>
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<p><strong>Expected</strong>: WASM bundle < 500KB, components render reactively</p>
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<hr />
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<h2 id="consequences"><a class="header" href="#consequences">Consequences</a></h2>
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<ul>
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<li>Team must learn Leptos reactive system</li>
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<li>SSR not available (acceptable trade-off)</li>
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<li>Maintenance: Leptos updates follow Rust ecosystem</li>
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</ul>
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<hr />
|
||
|
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<h2 id="references"><a class="header" href="#references">References</a></h2>
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<ul>
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<li><a href="https://leptos.dev/">Leptos Documentation</a></li>
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<li><code>/crates/vapora-frontend/src/</code> (source code)</li>
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</ul>
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<hr />
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<p><strong>Related ADRs</strong>: ADR-001 (Workspace)</p>
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