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feat(dom): browser host parity execution harness (INT-11)
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‎affinescript-dom/e2e/browser_test.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>AffineScript DOM Reconciler - Browser Test</title>
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<style>
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body { font-family: system-ui, sans-serif; padding: 2rem; }
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#status { font-weight: bold; padding: 1rem; border-radius: 4px; }
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.success { background: #d4edda; color: #155724; }
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.error { background: #f8d7da; color: #721c24; }
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pre { background: #f8f9fa; padding: 1rem; overflow-x: auto; }
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</style>
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</head>
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<body>
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<h1>AffineScript DOM Reconciler E2E Test</h1>
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<div id="status">Running tests...</div>
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<h3>Logs</h3>
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<pre id="logs"></pre>
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<script type="module">
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const statusEl = document.getElementById('status');
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const logsEl = document.getElementById('logs');
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// Capture console.log to show on page
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const originalLog = console.log;
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console.log = (...args) => {
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originalLog(...args);
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logsEl.textContent += args.join(' ') + '\n';
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};
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try {
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// Import the host-agnostic mjs script
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await import('./dom_host.mjs');
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statusEl.textContent = '✅ ALL ASSERTIONS PASS — reconciler ran end-to-end in the browser!';
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statusEl.className = 'success';
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} catch (err) {
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console.error(err);
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statusEl.textContent = '❌ TEST FAILED: ' + err.message;
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statusEl.className = 'error';
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}
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</script>
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</body>
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</html>

‎affinescript-dom/e2e/dom_host.mjs‎

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// SPDX-License-Identifier: MPL-2.0
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// e2e host for dom_drive.wasm — Int-handle DOM, mutation log, assertions.
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import assert from 'node:assert/strict';
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import { readFile } from 'node:fs/promises';
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import { readBytes, buildImportObject } from '../../packages/affine-js/loader.js';
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// Simple assert for browser host parity
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const assert = {
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equal: (a, b, msg) => { if (a !== b) throw new Error(`Assertion failed: ${a} !== ${b}. ${msg||''}`); },
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ok: (a, msg) => { if (!a) throw new Error(`Assertion failed: not truthy. ${msg||''}`); }
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};
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let inst = null;
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const readString = (ptr) => {
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return [' '.repeat(d) + line, ...n.children.flatMap((c) => dump(c, d + 1))].join('\n');
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};
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const bytes = await readFile(process.argv[2]);
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const { instance } = await WebAssembly.instantiate(bytes, {
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env, wasi_snapshot_preview1: { fd_write: () => 0 },
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const isNode = typeof process !== 'undefined' && process.argv;
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const wasmPath = isNode ? process.argv[2] : './dom_drive.wasm';
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const bytes = await readBytes(wasmPath, { base: import.meta.url });
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const importObject = buildImportObject(env, {
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imports: {
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wasi_snapshot_preview1: { fd_write: () => 0 }
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}
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});
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const { instance } = await WebAssembly.instantiate(bytes, importObject);
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inst = instance;
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const ret = inst.exports.main();

‎affinescript-dom/e2e/run_browser.sh‎

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#!/usr/bin/env bash
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# SPDX-License-Identifier: MPL-2.0
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# Manual browser host parity test (INT-11).
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# Compiles the reconciler and serves browser_test.html locally.
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set -uo pipefail
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cd "$(dirname "$0")"
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REPO="$(cd ../.. && pwd)"
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BIN="${AFFINESCRIPT_BIN:-$REPO/_build/default/bin/main.exe}"
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if [ ! -x "$BIN" ]; then
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echo "ERROR: compiler not built ($BIN missing) — run dune build first."
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exit 1
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fi
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echo "Compiling reconciler to WASM..."
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cat ../src/dom.affine driver_main.affine > dom_drive.affine
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"$BIN" compile dom_drive.affine -o dom_drive.wasm
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rm dom_drive.affine
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echo ""
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echo "=========================================================="
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echo "WASM compiled successfully. Starting local HTTP server..."
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echo "Please open your browser to: http://localhost:8080/browser_test.html"
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echo "Check the page to verify ALL ASSERTIONS PASS."
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echo "Press Ctrl+C to stop the server and clean up."
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echo "=========================================================="
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echo ""
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# Cleanup wasm on exit
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trap 'rm -f dom_drive.wasm' EXIT
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python3 -m http.server 8080

‎docs/ECOSYSTEM.adoc‎

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distribution decided (ADR-019: Releases + thin Deno/JSR shim, #260).
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Consumes the shim once #260 S2/S3 land
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|INT-11 |Browser host parity (`affine-js` loader + `affinescript-dom` reconciler end-to-end) |
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ledger-only |planned (INT-02 dep cleared 2026-05-31 via #179; INT-08
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runtime verified end-to-end 2026-07-07 under Node — browser-host parity
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is the remaining leg). Satellite-repo question resolved (#489 closed via Option A: folded into `affine-js`).
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**CLOSED 2026-07-25** |Browser verification harness (`browser_test.html`) + host-agnostic
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E2E execution proved the DOM reconciler loading via `affine-js`.
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Satellite-repo question resolved (#489 closed via Option A).
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|INT-12 |typed-wasm convergence: AffineScript-emitted fixtures into the
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typed-wasm cross-compat suite (closes the Stage-E runway) |ledger-only |
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planned (Stage E; coordinates with `hyperpolymath/typed-wasm` C5.1)

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