Step 17: streaming render — chunked transfer, shell-first suspense, resolve scripts
Server (sx_server.ml):
- Chunked HTTP transport (Transfer-Encoding: chunked)
- Streaming page detection via scan_defpages (:stream true)
- Shell-first render: outer layout + shell AST → aser → SSR → flush
- Data resolution: evaluate :data, render :content per slot, flush __sxResolve scripts
- AJAX streaming: synchronous eval + OOB swaps for SPA navigation
- SX URL → flat path conversion for defpage matching
- Error boundaries per resolve section
- streaming-demo-data helper for the demo page
Client (sx-platform.js):
- Sx.resolveSuspense: finds [data-suspense] element, parses SX, renders to DOM
- Fallback define for resolve-suspense when boot.sx imports fail in WASM
- __sxPending drain on boot (queued resolves from before sx.js loads)
- __sxResolve direct dispatch after boot
Tests (streaming.spec.js):
- 5 sandbox tests using real WASM kernel
- Suspense placeholder rendering, __sxResolve replacement, independent slot resolution
- Full layout with gutters, end-to-end resolve with streaming-demo/chunk components
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
giles
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