2026-09-08 19:55:20 +02:00
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# buuh (choo v8) — branch notes
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> Naming note: this work now ships publicly as **buuh**, a friendly fork
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> under the `uhhm` org on project.uhhm.no, with packages scoped
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> `@uhhm/*` (scoped so npm's per-scope registry routing works — and so
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> we never squat upstream's names on any registry). The docs below use
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> both names; "v8" refers to this modernization effort either way. The
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> upstream RFC stays drafted in `docs/upstream-rfc-draft.md` if this
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> ever goes home.
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2026-09-08 15:59:26 +02:00
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This branch is the working tree for the v8 modernization effort. The v7 code
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at the repo root is untouched and stays authoritative until 8.0.0 ships;
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everything new lives under `packages/`.
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## Layout
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- `packages/core` — `@uhhm/buuh`: the Choo class, same API as choo v7
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(`use`/`route`/`start`/`mount`/`toString`/`emit`), ported to ESM. The
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nano* internals are consolidated into `lib/` as attributed ports:
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- `lib/bus.js` ← nanobus 4.5.0
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- `lib/router.js` ← nanorouter 4.0.0 + wayfarer 7.0.1 (+ trie)
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- `lib/cache.js` ← choo component/cache.js + nanolru 1.0.0
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- `lib/raf.js` ← nanoraf 3.1.0, `lib/href.js` ← nanohref 3.1.0
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- `lib/timing.js` ← nanotiming 7.3.1 (unified on global `performance`)
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- `lib/dom.js` ← document-ready 2.0.1 + scroll-to-anchor 1.0.0
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- `lib/query.js` — nanoquery replaced by `URLSearchParams`
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- `packages/html` — `@uhhm/buuh-html`: the rendering package.
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- `server.js` — server-side tagged template (← nanohtml 1.10.0 server,
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transform branches removed; pure runtime)
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- `browser.js` — runtime-only cached template tag: each template literal
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is parsed once (WeakMap keyed on its strings array) into a <template>
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plus hole instructions; renders clone and fill. Values never pass
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through innerHTML. Document-level roots (<body> etc.) parse via
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DOMParser since <template> drops them. Known limits: no dynamic tag
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names, no holes in raw-text elements, SVG fragments need their <svg>
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root, and (unlike v7) whitespace is preserved as authored — which is
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what makes server and browser output byte-identical.
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2026-09-08 15:59:26 +02:00
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- `morph.js` — ← nanomorph 5.4.3, consolidated to one module
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- `raw.js` — mark pre-encoded strings (works with both renderers)
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- `packages/component` — `@uhhm/buuh-component`: ← nanocomponent 6.6.0 +
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on-load 3.4.1 as ES classes; the future island/hydration boundary.
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- `packages/devtools` — `@uhhm/buuh-devtools`: window.choo with live state,
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event log, timings via PerformanceObserver, copy(); no-op on the server.
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- `packages/migrate` — `@uhhm/buuh-migrate`: the `choo-migrate` codemod.
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Regex-based on purpose: converts simple top-level CJS to ESM, remaps
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specifiers (choo → @uhhm/buuh, nanohtml → @uhhm/buuh-html, …), points
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retired packages at their replacements, and reports everything it
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refuses to guess at.
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- `examples/counter` — the isomorphic proof: one app module, mounted
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zero-build in the browser via import map (`index.html`), string-rendered
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in Node (`render.js`).
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- `examples/streaming` — streaming SSR demo server
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(`node examples/streaming/server.js`).
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## Status vs the modernization plan
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- [x] Phase 1: monorepo scaffold, ESM ports, choo v7 node test suite green
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on `node --test` (Node ≥ 24), CI on GitHub Actions
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- [x] URL normalization fix: WHATWG URL parsing, single decode with raw
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fallback (no more URIError on '%'), NFC matching, per-segment
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wildcard decode, decoded state.href
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- [x] Phase 2 (core): browser renderer rewrite, `@uhhm/buuh-component`,
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zero-build counter example, full-app integration test in happy-dom
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- [x] Phase 2 (tail): adoption-style hydration with mismatch warnings
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(`@uhhm/buuh-html/hydrate`, wired into `mount()`), real-browser
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Playwright e2e (zero-build page, SSR-then-hydrate page, adoption
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proof; CI job included), benchmarks vs nanohtml v1 / µhtml
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## Benchmarks (2026-09, 100-row table, `npm run bench` / `bench:browser`)
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Real Chromium: @uhhm/buuh-html creates fresh trees ~12% faster than µhtml v5
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(3.5k vs 3.1k ops/s) — the parse-once/clone design pays off in native DOM.
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µhtml updates in place ~5x faster than our fresh-tree + nanomorph loop
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(3.0k vs 0.6k ops/s): that is choo's architectural cost, mitigated in real
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apps by @uhhm/buuh-component caching (proxy nodes skip unchanged subtrees),
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and the number to beat if Phase 3 explores keyed-hole optimizations.
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Server string rendering is on par with nanohtml v1 (~13k ops/s, within
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6%). happy-dom numbers in bench/render.js are indicative only.
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- [x] Phase 3: v8 wiring, all shipped together:
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- `toStream(location, state)` — web-standard ReadableStream of
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UTF-8; `new Response(stream)` on web servers,
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`Readable.fromWeb(stream).pipe(res)` on Node. Progressive: the
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server tag now builds a parts list, so promises/async iterables
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in child position flush the shell first and stream the rest in
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document order (proven byte-level and in real Chromium).
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- `state.prefetch` — stores push promises during init; toStream
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awaits them before rendering; toString refuses them loudly.
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- `lazy(loader, loadingView?)` — the answer to choojs/choo#653,
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both halves at once: browser renders the loading view (or holds
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the current tree) until the dynamic import lands, server awaits
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it in toStream; toString fails with guidance. Views cache after
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first load.
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- `@uhhm/buuh-devtools` and the `choo-migrate` codemod (validated by
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migrating choo's own v7 example and running the result on v8).
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- [ ] Phase 3 follow-ups for the RFC: API shape feedback on lazy()
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(thenable handlers vs wrapper), serializing streamed state for
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hydration of async holes (bankai v10 territory).
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2026-09-08 19:32:38 +02:00
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- [x] Phase 4: bankai v10 — `packages/bankai`, a thin shell over Vite 8
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(Rolldown). The server side needs no build at all: v8 apps are
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plain ESM that Node runs as-authored, so only the client bundles.
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- `bankai start <entry>` — dev: Vite middleware mode + HMR, with
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per-request streaming SSR through vite.ssrLoadModule and a
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virtual client entry (the user writes one isomorphic module;
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bankai generates the two lines of browser glue).
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- `bankai build <entry>` — client bundle + Vite manifest +
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dist/bankai.json route/asset metadata + service worker (if
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`<entry dir>/sw.js` exists, built with the precache list
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injected) + brotli/gzip precompression of every text asset.
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- `bankai serve` — production: static assets with immutable
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caching and precompressed-variant negotiation, 103 Early Hints
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(`res.writeEarlyHints`) carrying the route's assets before every
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SSR page, streaming render, and a `window.initialState` tail
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(script-safe serialization, choo internals filtered; hydration
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ignores server-only scripts).
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- `bankai inspect` — raw/gzip/brotli size table from the manifest.
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All proven end-to-end in real Chromium: both dev and prod pages
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hydrate with zero console errors and zero mismatch warnings, and
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the 103 interim response is asserted at the HTTP level.
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- [x] Phase 4 follow-ups: `bankai serve --h2` (local certs via openssl,
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103 verified with a real h2 client), `bankai build --prerender`,
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SSR `<title>` from state (the server reads the first stream chunk
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before writing the head), the `style.css` convention (client-only
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CSS — the sheetify answer), and the CI wire-size budget
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(`npm run size`: 7.97 kB min+gzip for the whole framework,
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budget 8.5 kB).
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- [x] Phase 5: README rewritten for v8 (honest size claim, credits),
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`docs/migrating-v7-to-v8.md`, `docs/deploy.md` (Node, Docker,
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proxy/CDN with the HTTP/3 story — h3 is infrastructure's job,
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bankai's contract is the 103 + Link headers any hints-aware edge
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propagates — and web-standard runtimes), and `docs/rfc.md`: the
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draft announcement to post on choojs/choo, with the pings, the
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asks, and the three-week comment window.
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- [ ] Post-RFC: publish pre-releases under a next tag, refresh
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choo.io/handbook (separate repos), deprecation pointers on retired
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packages only after 8.0.0, first-class edge adapter for bankai.
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- [ ] Phase 4: bankai v10 (Vite 8/Rolldown shell, SSR middleware,
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103 Early Hints, service worker, precompression)
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- [ ] Phase 5: docs, examples, launch
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## Deliberate changes from v7
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- `choo()` still works without `new`; `Choo` is also a named export.
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- nanoquery → `URLSearchParams` (same output shape, repeated keys → arrays).
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- Assertions live in `lib/assert.js` so production builds can strip them.
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- Everything targets Node ≥ 24 and Baseline Widely Available browsers; there
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is no compile step and no transpilation anywhere.
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## Attribution
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All ported modules are MIT-licensed work by the original choojs/nano*
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authors and contributors; per-file headers note the source package and
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version. This branch exists to carry that work forward, not to replace it.
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