update readme

Responsive single-column layout (max 480px) with styles for:
- Option items with label/vote-button rows
- Voted state highlighting (green tint)
- Active/closed timer color states
- Disabled button opacity
- Full-width copy URL button

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -1,3 +1 @@
-node_modules
-dist
-.DS_Store
+node_modules/

MVP_PLAN.md

@@ -1,310 +0,0 @@
-# Minimal MVP Plan: P2P Poll App
-
-## Recommendation
-
-Build the MVP with:
-
-- Vanilla JS or TypeScript
-- Vite for local dev/build
-- Yjs for shared state
-- `y-webrtc` for browser-to-browser sync
-- `y-indexeddb` for local persistence/offline recovery
-
-This is the best fit for a small poll app because the data model is tiny, concurrent edits are possible, and Yjs already solves merge/conflict handling while `y-webrtc` gives a direct P2P transport with only signaling infrastructure.
-
-## Why This Stack
-
-### Recommended: Yjs + y-webrtc
-
-- Best balance of simplicity and correctness
-- Clients connect directly over WebRTC
-- No custom conflict-resolution logic needed
-- Easy to add offline persistence
-- Good fit for a single shared document/room
-
-### Not recommended for the first MVP
-
-#### PeerJS
-
-- Very simple transport layer
-- But you must design and maintain your own replication and merge rules
-- Fine for demos with a host-authoritative peer, weaker for true collaborative editing
-
-#### GUN
-
-- Fast to prototype realtime shared state
-- But official tutorials commonly use a GUN peer/relay server for shared data
-- For this app, its data model is less explicit than a CRDT and gives less control over vote semantics
-
-#### Automerge
-
-- Very capable CRDT and local-first model
-- But heavier than needed for a single small poll
-- Better choice if the project is expected to evolve into a richer collaborative app
-
-## MVP Scope
-
-Ship exactly one shared poll per room.
-
-Included:
-
-- Join a poll by opening a shared URL
-- Add a new option
-- Vote for one option
-- Change your vote
-- Realtime updates across peers
-- Local persistence in the browser
-- Basic connection status UI
-
-Excluded:
-
-- User accounts
-- Multiple polls per room
-- Option deletion/editing
-- Authentication/authorization
-- Rich presence
-- Advanced discovery
-- Production-grade TURN/signaling deployment
-
-## MVP UX
-
-Keep the interface intentionally small:
-
-- Poll title at the top
-- Option list with vote counts
-- One button per option to cast vote
-- Small form to add an option
-- Status line showing `connecting`, `connected`, or `offline`
-- Small label showing which option you voted for
-
-Join model:
-
-- Room ID in the URL, e.g. `/?room=poll-demo`
-- Users share the URL manually
-
-Identity model:
-
-- Generate a local `userId` once and store it in `localStorage`
-- Optional local display name, also stored locally
-
-## Shared Data Model
-
-Use a single Yjs document per room.
-
-Suggested structure:
-
-- `poll` as a `Y.Map`
-- `poll.title` as a string
-- `poll.options` as a `Y.Map<optionId, Y.Map>`
-- `poll.votes` as a `Y.Map<userId, optionId>`
-
-Each option record:
-
-- `id`
-- `label`
-- `createdBy`
-- `createdAt`
-
-Important design choice:
-
-Do not store vote counters as mutable shared numbers for the MVP.
-Instead, derive counts from `votes`.
-
-Why:
-
-- A user changing vote becomes a single write: `votes[userId] = optionId`
-- No double-counting logic
-- Concurrent writes are easier to reason about
-- Rendering counts from `votes` is trivial at this scale
-
-## Sync Model
-
-### Networking
-
-- Use `WebrtcProvider(roomId, ydoc)`
-- Start with the default public signaling servers for local development
-- If needed, swap to a self-hosted signaling server later without changing the app model
-
-### Persistence
-
-- Use `IndexeddbPersistence(roomId, ydoc)`
-- This preserves state across reloads and helps when reconnecting after temporary disconnects
-
-### Conflict behavior
-
-- Concurrent option additions merge naturally
-- Concurrent vote changes resolve at the per-user key level
-- Tally is recalculated from the merged vote map
-
-## Suggested Project Structure
-
-```text
-src/
-  main.ts
-  app.ts
-  state.ts
-  sync.ts
-  render.ts
-  identity.ts
-  styles.css
-index.html
-```
-
-Responsibilities:
-
-- `sync.ts`: create Yjs doc, WebRTC provider, IndexedDB provider
-- `state.ts`: shared structures, add option, cast vote, selectors
-- `identity.ts`: local `userId` and optional name
-- `render.ts`: DOM updates
-- `app.ts`: wire events to state and rendering
-
-## Implementation Plan
-
-### Phase 1: App shell
-
-- Create Vite app with vanilla TS or JS
-- Add a minimal single-page UI
-- Parse `room` from the URL
-- Generate and persist `userId`
-
-Success check:
-
-- App loads
-- Room ID appears in UI
-- User can type in the form
-
-### Phase 2: Shared state
-
-- Add Yjs document
-- Create root shared maps
-- Seed default poll title if missing
-- Observe document updates and re-render UI
-
-Success check:
-
-- State exists in one browser tab
-- Refresh keeps local state when IndexedDB is enabled
-
-### Phase 3: P2P sync
-
-- Add `y-webrtc`
-- Join room based on URL room ID
-- Show connection status from provider events
-
-Success check:
-
-- Two browsers on different tabs/devices see the same options
-- New options appear in near real time
-
-### Phase 4: Voting logic
-
-- Implement `castVote(optionId)` as `votes.set(userId, optionId)`
-- Derive tallies from `votes`
-- Highlight the local user’s current vote
-
-Success check:
-
-- Votes update live across peers
-- Changing vote updates counts correctly
-
-### Phase 5: Basic hardening
-
-- Trim/validate option labels
-- Prevent empty options
-- Ignore duplicate labels case-insensitively for MVP
-- Show simple offline/connecting text
-
-Success check:
-
-- Basic misuse does not break the UI
-- Reconnect restores updates
-
-## Minimal API Surface
-
-These functions are enough for the first build:
-
-- `getRoomId(): string`
-- `getUserId(): string`
-- `initSync(roomId): AppSync`
-- `ensurePollInitialized()`
-- `addOption(label: string)`
-- `castVote(optionId: string)`
-- `getViewModel(): PollViewModel`
-- `render(viewModel)`
-
-## Risks And MVP Mitigations
-
-### NAT / WebRTC connectivity
-
-Risk:
-
-- Some peer pairs may fail to connect in restrictive networks
-
-Mitigation:
-
-- Accept this for MVP
-- Keep signaling configurable
-- Add TURN only if testing shows frequent failures
-
-### Small public signaling dependency
-
-Risk:
-
-- Public signaling is fine for demos, not ideal for production
-
-Mitigation:
-
-- Treat it as replaceable infrastructure
-- Self-host later if the prototype is kept
-
-### Duplicate or messy options
-
-Risk:
-
-- Users may add near-duplicate entries
-
-Mitigation:
-
-- Normalize labels
-- Prevent exact duplicates for MVP
-
-### No trust/auth model
-
-Risk:
-
-- Any participant in the room can add options and vote
-
-Mitigation:
-
-- Accept for MVP
-- Frame rooms as small trusted groups
-
-## Estimated MVP Size
-
-For one developer:
-
-- Initial prototype: 0.5 to 1 day
-- Polished MVP with basic resilience: 1 to 2 days
-
-Rough code size:
-
-- 250 to 500 lines plus styles
-
-## Nice Next Steps After MVP
-
-- Copy-link button
-- Participant list / presence
-- Vote limit modes: single-choice or multi-choice
-- Option editing/deletion
-- QR code for room join
-- Self-hosted signaling server
-- PWA packaging for better offline behavior
-
-## Sources
-
-- PeerJS getting started: https://peerjs.com/client/getting-started
-- Yjs collaborative editor guide: https://docs.yjs.dev/getting-started/a-collaborative-editor
-- Yjs offline support: https://docs.yjs.dev/getting-started/allowing-offline-editing
-- y-webrtc README: https://github.com/yjs/y-webrtc
-- GUN tutorial showing shared data via a GUN peer: https://gun.eco/converse
-- Automerge network sync: https://automerge.org/docs/tutorial/network-sync/

README.md

@@ -1,39 +1,55 @@
 # P2P Poll App
 
-Small peer-to-peer polling app built with `Vite`, `TypeScript`, `Yjs`, `y-webrtc`, and `y-indexeddb`.
+A peer-to-peer polling app built with [Automerge](https://automerge.org/) and Vanilla JS. No backend required — polls sync in real time across browsers using CRDTs and a WebSocket relay.
 
 ## Features
 
-- single shared poll per room
-- add options collaboratively
-- one vote per user, changeable at any time
-- peer-to-peer sync over WebRTC
-- local browser persistence for refresh/reconnect recovery
-- shareable room URL
+- **Add options** — type an option and press Enter or click "Add Option". Duplicate options (case-insensitive) are rejected with an inline error message.
+- **Vote on options** — click the vote button next to any option. You can vote on multiple options, but only once per option.
+- **Toggle votes** — click your vote again to remove it (the button turns green with a checkmark when you've voted).
+- **Live vote counts** — options are sorted by vote count in descending order and update in real time as votes come in from other users.
+- **2-minute countdown timer** — click "Start 2-min Vote" to begin a shared countdown. Voting is open before and during the countdown. Once the timer expires, all vote buttons are disabled.
+- **Shared timer** — the deadline is stored in the Automerge document, so all peers see the same countdown and voting closes simultaneously for everyone.
+- **Copy URL** — click "Copy URL" to copy the poll link to your clipboard. Share it with others to join the same poll.
+- **P2P sync** — all state (options, votes, timer) syncs across browsers in real time with no central server handling your data.
 
-## Run locally
+## How it works
+
+### Tech stack
+
+- **[Automerge](https://automerge.org/)** via `@automerge/vanillajs` — a CRDT library that lets multiple clients concurrently edit shared documents and merge changes without conflicts.
+- **BroadcastChannelNetworkAdapter** — syncs between tabs in the same browser instantly via the browser's BroadcastChannel API.
+- **WebSocketClientAdapter** — syncs across different browsers/devices via a WebSocket relay (`wss://sync.automerge.org`). The relay only forwards CRDT messages; it does not store or interpret your data.
+- **IndexedDBStorageAdapter** — persists the document locally so it survives page refreshes.
+- **Vite** — bundles the app with WebAssembly support (required by Automerge).
+
+### Data model
+
+The poll is a single Automerge document with three fields:
+
+```js
+{
+  options: string[],       // list of poll options in insertion order
+  votes: { [option]: number }, // vote count per option
+  deadline: number | null  // Unix timestamp (ms) when voting closes, or null
+}
+```
+
+### URL-based sharing
+
+Each document gets a unique Automerge URL (e.g. `automerge:abc123...`) stored in the page's URL hash. Opening the same URL in any browser loads and syncs the same document. Creating a new poll generates a new document and updates the hash automatically.
+
+### Voting rules
+
+- Voted options are tracked in `localStorage` (keyed by document URL), so they persist across page refreshes but are isolated per browser.
+- One vote per option per user. Votes can be toggled off and back on until the timer expires.
+- The timer (`doc.deadline`) is set once by whoever clicks "Start 2-min Vote" and is shared via the Automerge document, so all peers use the same deadline.
+
+## Running locally
 
 ```bash
-npm install
-npm run dev
+pnpm install
+pnpm dev
 ```
 
-Open the local URL in two tabs or browsers and use the same `?room=` query string to join the same poll.
-
-Example:
-
-```text
-http://localhost:5173/?room=poll-demo
-```
-
-## Build
-
-```bash
-npm run build
-```
-
-## Notes
-
-- The app uses public signaling through `y-webrtc` for MVP simplicity.
-- Poll state is not stored on an application server.
-- WebRTC connectivity can still depend on the network environment of the participating peers.
+Open the printed localhost URL. To test cross-browser sync, copy the URL (including the `#automerge:...` hash) and open it in a different browser.

app.js

@@ -0,0 +1,214 @@
+import {
+  Repo,
+  BroadcastChannelNetworkAdapter,
+  WebSocketClientAdapter,
+  IndexedDBStorageAdapter,
+  isValidAutomergeUrl,
+} from "@automerge/vanillajs";
+
+const REPO = new Repo({
+  network: [
+    new BroadcastChannelNetworkAdapter(),
+    new WebSocketClientAdapter("wss://sync.automerge.org"),
+  ],
+  storage: new IndexedDBStorageAdapter(),
+});
+
+let HANDLE;
+
+function getVotedKey(docUrl) {
+  return `p2p-poll-voted:${docUrl}`;
+}
+
+function getVotedOptions() {
+  const key = getVotedKey(document.location.hash);
+  return new Set(JSON.parse(localStorage.getItem(key) || "[]"));
+}
+
+function markVoted(opt) {
+  const key = getVotedKey(document.location.hash);
+  const voted = getVotedOptions();
+  voted.add(opt);
+  localStorage.setItem(key, JSON.stringify([...voted]));
+}
+
+function unmarkVoted(opt) {
+  const key = getVotedKey(document.location.hash);
+  const voted = getVotedOptions();
+  voted.delete(opt);
+  localStorage.setItem(key, JSON.stringify([...voted]));
+}
+
+const locationHash = document.location.hash.substring(1);
+const statusEl = document.getElementById("status");
+const optionsList = document.getElementById("options-list");
+const optionInput = document.getElementById("option-input");
+const addBtn = document.getElementById("add-btn");
+const duplicateMsg = document.getElementById("duplicate-msg");
+const copyBtn = document.getElementById("copy-btn");
+const timerEl = document.getElementById("timer");
+const startVotingBtn = document.getElementById("start-voting-btn");
+
+if (isValidAutomergeUrl(locationHash)) {
+  statusEl.textContent = "Loading document…";
+  try {
+    HANDLE = await REPO.find(locationHash);
+    statusEl.textContent = "";
+  } catch (err) {
+    statusEl.textContent = "Could not load document. Starting a new one.";
+    HANDLE = REPO.create({ options: [], votes: {}, deadline: null });
+    document.location.hash = HANDLE.url;
+  }
+} else {
+  HANDLE = REPO.create({ options: [], votes: {}, deadline: null });
+  document.location.hash = HANDLE.url;
+}
+
+HANDLE.on("change", ({ doc }) => render(doc));
+
+const initialDoc = HANDLE.doc();
+if (initialDoc) render(initialDoc);
+
+let timerInterval = null;
+
+function render(doc) {
+  renderOptions(doc);
+  renderTimer(doc);
+}
+
+function renderOptions(doc) {
+  const votes = doc.votes || {};
+  const deadline = doc.deadline ?? null;
+  const now = Date.now();
+  const votingClosed = deadline !== null && now >= deadline;
+  const votedOptions = getVotedOptions();
+
+  const sorted = [...(doc.options || [])].sort(
+    (a, b) => (votes[b] || 0) - (votes[a] || 0),
+  );
+
+  optionsList.innerHTML = "";
+  sorted.forEach((opt) => {
+    const count = votes[opt] || 0;
+    const alreadyVoted = votedOptions.has(opt);
+
+    const item = document.createElement("div");
+    item.className = "option-item";
+
+    const label = document.createElement("span");
+    label.className = "option-label";
+    label.textContent = opt;
+
+    const voteBtn = document.createElement("button");
+    voteBtn.className = alreadyVoted ? "vote-btn voted" : "vote-btn";
+    voteBtn.textContent = alreadyVoted ? `✓ ${count}` : `▲ ${count}`;
+    voteBtn.disabled = votingClosed;
+    if (votingClosed) voteBtn.title = "Voting is closed";
+    else if (alreadyVoted) voteBtn.title = "Click to remove your vote";
+
+    voteBtn.addEventListener("click", () => {
+      if (alreadyVoted) {
+        unmarkVoted(opt);
+        HANDLE.change((d) => {
+          if (!d.votes) d.votes = {};
+          d.votes[opt] = Math.max(0, (d.votes[opt] || 0) - 1);
+        });
+      } else {
+        markVoted(opt);
+        HANDLE.change((d) => {
+          if (!d.votes) d.votes = {};
+          d.votes[opt] = (d.votes[opt] || 0) + 1;
+        });
+      }
+    });
+
+    item.appendChild(label);
+    item.appendChild(voteBtn);
+    optionsList.appendChild(item);
+  });
+}
+
+function renderTimer(doc) {
+  const deadline = doc?.deadline ?? null;
+  const now = Date.now();
+
+  if (deadline === null) {
+    timerEl.textContent = "";
+    startVotingBtn.hidden = false;
+    return;
+  }
+
+  startVotingBtn.hidden = true;
+
+  if (now >= deadline) {
+    timerEl.textContent = "Voting closed.";
+    timerEl.className = "timer closed";
+    clearInterval(timerInterval);
+    timerInterval = null;
+    return;
+  }
+
+  const remaining = Math.ceil((deadline - now) / 1000);
+  const mins = Math.floor(remaining / 60);
+  const secs = remaining % 60;
+  timerEl.textContent = `Voting closes in ${mins}:${secs.toString().padStart(2, "0")}`;
+  timerEl.className = "timer active";
+
+  if (!timerInterval) {
+    timerInterval = setInterval(() => {
+      const d = HANDLE.doc();
+      if (!d) return;
+      renderTimer(d);
+      renderOptions(d);
+      if (Date.now() >= d.deadline) {
+        clearInterval(timerInterval);
+        timerInterval = null;
+      }
+    }, 1000);
+  }
+}
+
+startVotingBtn.addEventListener("click", () => {
+  HANDLE.change((d) => {
+    d.deadline = Date.now() + 2 * 60 * 1000;
+  });
+});
+
+addBtn.addEventListener("click", () => {
+  const value = optionInput.value.trim();
+  if (!value) return;
+
+  const doc = HANDLE.doc();
+  const valueLower = value.toLowerCase();
+  const isDuplicate = (doc?.options || []).some(
+    (opt) => opt.toLowerCase() === valueLower,
+  );
+
+  if (isDuplicate) {
+    duplicateMsg.textContent = `"${value}" is already in the list.`;
+    duplicateMsg.hidden = false;
+    return;
+  }
+
+  duplicateMsg.hidden = true;
+  HANDLE.change((d) => {
+    if (!d.options) d.options = [];
+    d.options.push(value);
+  });
+  optionInput.value = "";
+});
+
+optionInput.addEventListener("keydown", (e) => {
+  if (e.key === "Enter") addBtn.click();
+});
+
+optionInput.addEventListener("input", () => {
+  duplicateMsg.hidden = true;
+});
+
+copyBtn.addEventListener("click", () => {
+  navigator.clipboard.writeText(window.location.href).then(() => {
+    copyBtn.textContent = "Copied!";
+    setTimeout(() => (copyBtn.textContent = "Copy URL"), 1500);
+  });
+});

index.html

@@ -1,12 +1,31 @@
 <!doctype html>
 <html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>P2P Poll</title>
-  </head>
-  <body>
-    <div id="app"></div>
-    <script type="module" src="/src/main.ts"></script>
-  </body>
+    <head>
+        <meta charset="UTF-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+        <title>P2P Polling App</title>
+        <link rel="stylesheet" href="./styles.css" />
+    </head>
+    <body>
+        <div id="app">
+            <h1>P2P Polling App</h1>
+            <div id="status"></div>
+            <div id="add-option">
+                <input
+                    type="text"
+                    id="option-input"
+                    placeholder="Enter an option..."
+                />
+                <button id="add-btn">Add Option</button>
+            </div>
+            <div id="duplicate-msg" hidden></div>
+            <div id="timer-section">
+                <div id="timer"></div>
+                <button id="start-voting-btn">Start 2-min Vote</button>
+            </div>
+            <div id="options-list"></div>
+            <button id="copy-btn">Copy URL</button>
+        </div>
+        <script type="module" src="./app.js"></script>
+    </body>
 </html>

package.json

@@ -1,20 +1,23 @@
 {
   "name": "p2p-poll-app",
-  "version": "0.1.0",
-  "private": true,
   "type": "module",
+  "engines": {
+    "node": ">=24"
+  },
   "scripts": {
     "dev": "vite",
-    "build": "tsc --noEmit && vite build",
+    "build": "vite build",
     "preview": "vite preview"
   },
   "dependencies": {
-    "y-indexeddb": "^9.0.12",
-    "y-webrtc": "^10.3.0",
-    "yjs": "^13.6.27"
+    "@automerge/automerge-repo": "^2.0.0",
+    "@automerge/automerge-repo-network-websocket": "^2.0.0",
+    "@automerge/automerge-repo-storage-indexeddb": "^2.0.0",
+    "@automerge/vanillajs": "^2.5.3"
   },
   "devDependencies": {
-    "typescript": "^5.9.2",
-    "vite": "^7.1.5"
+    "vite": "^6.0.0",
+    "vite-plugin-top-level-await": "^1.4.0",
+    "vite-plugin-wasm": "^3.3.0"
   }
 }

src/app.ts

@@ -1,107 +0,0 @@
-import { getUserId } from "./identity";
-import { renderApp } from "./render";
-import { addOption, castVote, createViewModel } from "./state";
-import { initSync } from "./sync";
-
-const ROOM_PARAM = "room";
-
-function createRoomId() {
-  const seed = typeof crypto.randomUUID === "function"
-    ? crypto.randomUUID().slice(0, 8)
-    : Math.random().toString(36).slice(2, 10);
-
-  return `poll-${seed}`;
-}
-
-function ensureRoomId() {
-  const url = new URL(window.location.href);
-  let roomId = url.searchParams.get(ROOM_PARAM)?.trim();
-
-  if (!roomId) {
-    roomId = createRoomId();
-    url.searchParams.set(ROOM_PARAM, roomId);
-    window.history.replaceState({}, "", url);
-  }
-
-  return roomId;
-}
-
-export function initApp(container: HTMLElement) {
-  const roomId = ensureRoomId();
-  const userId = getUserId();
-  const sync = initSync(roomId);
-  let feedbackMessage = "Ready to collaborate.";
-  let feedbackTimer: number | undefined;
-
-  const setFeedbackMessage = (message: string) => {
-    feedbackMessage = message;
-    render();
-
-    if (feedbackTimer) {
-      window.clearTimeout(feedbackTimer);
-    }
-
-    feedbackTimer = window.setTimeout(() => {
-      feedbackMessage = "Ready to collaborate.";
-      render();
-    }, 2400);
-  };
-
-  const render = () => {
-    const viewModel = createViewModel({
-      meta: sync.meta,
-      options: sync.options,
-      votes: sync.votes,
-      roomId,
-      shareUrl: window.location.href,
-      connectionStatus: sync.getConnectionStatus(),
-      userId,
-    });
-
-    renderApp(container, viewModel, feedbackMessage, {
-      onSubmitOption: (label) => {
-        const result = addOption(sync.options, label, userId);
-        if (!result.ok) {
-          setFeedbackMessage(result.error);
-          return;
-        }
-
-        setFeedbackMessage("Option added and syncing.");
-      },
-      onVote: (optionId) => {
-        castVote(sync.votes, userId, optionId);
-        setFeedbackMessage("Vote updated.");
-      },
-      onCopyLink: async () => {
-        try {
-          await navigator.clipboard.writeText(window.location.href);
-          setFeedbackMessage("Room link copied.");
-        } catch {
-          setFeedbackMessage("Could not copy the link in this browser.");
-        }
-      },
-    });
-  };
-
-  const rerender = () => render();
-  const observe = () => rerender();
-
-  sync.doc.on("update", observe);
-  sync.persistence.once("synced", rerender);
-  sync.provider.on("status", rerender);
-  window.addEventListener("online", rerender);
-  window.addEventListener("offline", rerender);
-
-  render();
-
-  return () => {
-    if (feedbackTimer) {
-      window.clearTimeout(feedbackTimer);
-    }
-    sync.doc.off("update", observe);
-    sync.provider.off("status", rerender);
-    window.removeEventListener("online", rerender);
-    window.removeEventListener("offline", rerender);
-    sync.destroy();
-  };
-}

src/identity.ts

@@ -1,20 +0,0 @@
-const USER_ID_KEY = "p2p-poll:user-id";
-
-function createUserId() {
-  if (typeof crypto.randomUUID === "function") {
-    return crypto.randomUUID();
-  }
-
-  return `user-${Math.random().toString(36).slice(2, 10)}`;
-}
-
-export function getUserId() {
-  const existing = localStorage.getItem(USER_ID_KEY);
-  if (existing) {
-    return existing;
-  }
-
-  const next = createUserId();
-  localStorage.setItem(USER_ID_KEY, next);
-  return next;
-}

src/main.ts

@@ -1,11 +0,0 @@
-import "./styles.css";
-
-import { initApp } from "./app";
-
-const container = document.querySelector<HTMLElement>("#app");
-
-if (!container) {
-  throw new Error("App container not found.");
-}
-
-initApp(container);

src/render.ts

@@ -1,131 +0,0 @@
-import type { PollViewModel } from "./state";
-
-interface RenderActions {
-  onSubmitOption: (label: string) => void;
-  onVote: (optionId: string) => void;
-  onCopyLink: () => void;
-}
-
-function escapeHtml(value: string) {
-  return value
-    .replaceAll("&", "&")
-    .replaceAll("<", "&lt;")
-    .replaceAll(">", "&gt;")
-    .replaceAll('"', "&quot;")
-    .replaceAll("'", "&#39;");
-}
-
-export function renderApp(
-  container: HTMLElement,
-  viewModel: PollViewModel,
-  feedbackMessage: string,
-  actions: RenderActions,
-) {
-  const optionMarkup = viewModel.options.length
-    ? viewModel.options
-        .map((option) => {
-          const buttonLabel = option.isSelectedByMe ? "Selected" : "Vote";
-          const selectedClass = option.isSelectedByMe ? "option-card selected" : "option-card";
-
-          return `
-            <li class="${selectedClass}">
-              <div class="option-main">
-                <div>
-                  <p class="option-label">${escapeHtml(option.label)}</p>
-                  <p class="option-meta">${option.voteCount} vote${option.voteCount === 1 ? "" : "s"}</p>
-                </div>
-                <button class="vote-button" data-option-id="${option.id}">
-                  ${buttonLabel}
-                </button>
-              </div>
-            </li>
-          `;
-        })
-        .join("")
-    : `
-      <li class="empty-state">
-        No options yet. Add the first one and it will sync to everyone in this room.
-      </li>
-    `;
-
-  const statusClass = `status-pill ${viewModel.connectionStatus}`;
-  const myVoteLabel = viewModel.myVoteOptionId
-    ? "Your vote is currently synced."
-    : "You have not voted yet.";
-
-  container.innerHTML = `
-    <main class="shell">
-      <section class="hero">
-        <div class="hero-copy">
-          <p class="eyebrow">Peer-to-peer room</p>
-          <h1>${escapeHtml(viewModel.title)}</h1>
-          <p class="hero-text">
-            Share the room link, add options, and vote live without a central app server storing poll state.
-          </p>
-        </div>
-        <div class="hero-meta">
-          <span class="${statusClass}">${viewModel.connectionStatus}</span>
-          <p class="room-label">Room: <code>${escapeHtml(viewModel.roomId)}</code></p>
-        </div>
-      </section>
-
-      <section class="panel share-panel">
-        <label class="field-label" for="share-url">Share this room</label>
-        <div class="share-row">
-          <input id="share-url" class="share-input" type="text" readonly value="${escapeHtml(viewModel.shareUrl)}" />
-          <button id="copy-link-button" class="secondary-button" type="button">Copy link</button>
-        </div>
-      </section>
-
-      <section class="panel">
-        <div class="section-header">
-          <div>
-            <h2>Options</h2>
-            <p>${myVoteLabel}</p>
-          </div>
-        </div>
-        <ul class="options-list">${optionMarkup}</ul>
-      </section>
-
-      <section class="panel">
-        <h2>Add an option</h2>
-        <form id="add-option-form" class="option-form">
-          <input
-            id="option-input"
-            name="option"
-            type="text"
-            maxlength="80"
-            placeholder="Add an option"
-            autocomplete="off"
-            required
-          />
-          <button class="primary-button" type="submit">Add option</button>
-        </form>
-        <p class="feedback" aria-live="polite">${escapeHtml(feedbackMessage)}</p>
-      </section>
-    </main>
-  `;
-
-  const addOptionForm = container.querySelector<HTMLFormElement>("#add-option-form");
-  const optionInput = container.querySelector<HTMLInputElement>("#option-input");
-  const copyLinkButton = container.querySelector<HTMLButtonElement>("#copy-link-button");
-
-  addOptionForm?.addEventListener("submit", (event) => {
-    event.preventDefault();
-    const label = optionInput?.value ?? "";
-    actions.onSubmitOption(label);
-  });
-
-  copyLinkButton?.addEventListener("click", () => {
-    actions.onCopyLink();
-  });
-
-  container.querySelectorAll<HTMLButtonElement>("[data-option-id]").forEach((button) => {
-    button.addEventListener("click", () => {
-      const optionId = button.dataset.optionId;
-      if (optionId) {
-        actions.onVote(optionId);
-      }
-    });
-  });
-}

src/state.ts

@@ -1,124 +0,0 @@
-import * as Y from "yjs";
-
-export const DEFAULT_POLL_TITLE = "Shared Poll";
-
-export type ConnectionStatus = "connecting" | "connected" | "offline";
-
-export interface OptionRecord {
-  id: string;
-  label: string;
-  createdAt: number;
-  createdBy: string;
-}
-
-export interface PollOptionViewModel extends OptionRecord {
-  voteCount: number;
-  isSelectedByMe: boolean;
-}
-
-export interface PollViewModel {
-  title: string;
-  roomId: string;
-  shareUrl: string;
-  connectionStatus: ConnectionStatus;
-  options: PollOptionViewModel[];
-  myVoteOptionId: string | null;
-}
-
-const META_KEY_TITLE = "title";
-
-function createOptionId() {
-  if (typeof crypto.randomUUID === "function") {
-    return crypto.randomUUID();
-  }
-
-  return `option-${Math.random().toString(36).slice(2, 10)}`;
-}
-
-function normalizeLabel(label: string) {
-  return label.trim().replace(/\s+/g, " ");
-}
-
-function getPollTitle(meta: Y.Map<string>) {
-  return meta.get(META_KEY_TITLE) ?? DEFAULT_POLL_TITLE;
-}
-
-export function ensurePollInitialized(meta: Y.Map<string>) {
-  if (!meta.has(META_KEY_TITLE)) {
-    meta.set(META_KEY_TITLE, DEFAULT_POLL_TITLE);
-  }
-}
-
-export function addOption(
-  options: Y.Map<OptionRecord>,
-  rawLabel: string,
-  userId: string,
-) {
-  const label = normalizeLabel(rawLabel);
-  if (!label) {
-    return { ok: false as const, error: "Option label cannot be empty." };
-  }
-
-  const normalizedTarget = label.toLocaleLowerCase();
-  const duplicate = Array.from(options.values()).some(
-    (option) => option.label.trim().toLocaleLowerCase() === normalizedTarget,
-  );
-
-  if (duplicate) {
-    return { ok: false as const, error: "That option already exists." };
-  }
-
-  const option: OptionRecord = {
-    id: createOptionId(),
-    label,
-    createdAt: Date.now(),
-    createdBy: userId,
-  };
-
-  options.set(option.id, option);
-  return { ok: true as const, optionId: option.id };
-}
-
-export function castVote(votes: Y.Map<string>, userId: string, optionId: string) {
-  votes.set(userId, optionId);
-}
-
-export function createViewModel(params: {
-  meta: Y.Map<string>;
-  options: Y.Map<OptionRecord>;
-  votes: Y.Map<string>;
-  roomId: string;
-  shareUrl: string;
-  connectionStatus: ConnectionStatus;
-  userId: string;
-}): PollViewModel {
-  const { meta, options, votes, roomId, shareUrl, connectionStatus, userId } =
-    params;
-
-  const tally = new Map<string, number>();
-  for (const optionId of votes.values()) {
-    tally.set(optionId, (tally.get(optionId) ?? 0) + 1);
-  }
-
-  const myVoteOptionId = votes.get(userId) ?? null;
-  const sortedOptions = Array.from(options.values()).sort((left, right) => {
-    if (left.createdAt !== right.createdAt) {
-      return left.createdAt - right.createdAt;
-    }
-
-    return left.label.localeCompare(right.label);
-  });
-
-  return {
-    title: getPollTitle(meta),
-    roomId,
-    shareUrl,
-    connectionStatus,
-    myVoteOptionId,
-    options: sortedOptions.map((option) => ({
-      ...option,
-      voteCount: tally.get(option.id) ?? 0,
-      isSelectedByMe: myVoteOptionId === option.id,
-    })),
-  };
-}

src/styles.css

@@ -1,256 +0,0 @@
-:root {
-  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
-  color: #132238;
-  background:
-    radial-gradient(circle at top left, rgba(255, 190, 120, 0.55), transparent 28%),
-    radial-gradient(circle at top right, rgba(86, 201, 166, 0.3), transparent 24%),
-    linear-gradient(180deg, #f9f4e8 0%, #f4efe6 48%, #ece5d8 100%);
-  line-height: 1.5;
-  font-weight: 400;
-  color-scheme: light;
-}
-
-* {
-  box-sizing: border-box;
-}
-
-body {
-  margin: 0;
-  min-height: 100vh;
-}
-
-button,
-input {
-  font: inherit;
-}
-
-button {
-  cursor: pointer;
-}
-
-#app {
-  min-height: 100vh;
-}
-
-.shell {
-  width: min(920px, calc(100% - 2rem));
-  margin: 0 auto;
-  padding: 2rem 0 3rem;
-}
-
-.hero {
-  display: flex;
-  justify-content: space-between;
-  gap: 1.5rem;
-  align-items: flex-start;
-  margin-bottom: 1.5rem;
-}
-
-.hero-copy h1 {
-  margin: 0.15rem 0 0.5rem;
-  font-size: clamp(2.4rem, 6vw, 4rem);
-  line-height: 0.95;
-  letter-spacing: -0.05em;
-}
-
-.hero-text,
-.section-header p,
-.feedback,
-.option-meta,
-.room-label {
-  color: #4a5a6a;
-}
-
-.eyebrow {
-  margin: 0;
-  text-transform: uppercase;
-  letter-spacing: 0.16em;
-  font-size: 0.8rem;
-  color: #915f00;
-}
-
-.hero-meta {
-  min-width: 15rem;
-  padding: 1rem 1.1rem;
-  border-radius: 1.2rem;
-  background: rgba(255, 255, 255, 0.68);
-  border: 1px solid rgba(19, 34, 56, 0.08);
-  backdrop-filter: blur(10px);
-}
-
-.status-pill {
-  display: inline-flex;
-  align-items: center;
-  padding: 0.35rem 0.75rem;
-  border-radius: 999px;
-  font-weight: 700;
-  text-transform: capitalize;
-  font-size: 0.9rem;
-}
-
-.status-pill.connected {
-  background: rgba(86, 201, 166, 0.18);
-  color: #135d43;
-}
-
-.status-pill.connecting {
-  background: rgba(255, 190, 120, 0.22);
-  color: #8c5300;
-}
-
-.status-pill.offline {
-  background: rgba(219, 82, 82, 0.16);
-  color: #8f1f1f;
-}
-
-.panel {
-  margin-bottom: 1.25rem;
-  padding: 1.25rem;
-  border-radius: 1.3rem;
-  background: rgba(255, 255, 255, 0.78);
-  border: 1px solid rgba(19, 34, 56, 0.08);
-  box-shadow: 0 14px 40px rgba(19, 34, 56, 0.08);
-  backdrop-filter: blur(10px);
-}
-
-.panel h2 {
-  margin: 0 0 0.45rem;
-  font-size: 1.1rem;
-}
-
-.share-row,
-.option-form,
-.option-main {
-  display: flex;
-  gap: 0.75rem;
-}
-
-.field-label {
-  display: block;
-  margin-bottom: 0.6rem;
-  font-weight: 700;
-}
-
-.share-input,
-.option-form input {
-  width: 100%;
-  min-width: 0;
-  border-radius: 0.95rem;
-  border: 1px solid rgba(19, 34, 56, 0.14);
-  background: rgba(255, 255, 255, 0.94);
-  padding: 0.85rem 1rem;
-  color: #132238;
-}
-
-.share-input:focus,
-.option-form input:focus {
-  outline: 2px solid rgba(255, 190, 120, 0.65);
-  outline-offset: 1px;
-}
-
-.primary-button,
-.secondary-button,
-.vote-button {
-  border: none;
-  border-radius: 0.95rem;
-  padding: 0.85rem 1rem;
-  font-weight: 700;
-  transition: transform 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
-}
-
-.primary-button,
-.vote-button {
-  background: #132238;
-  color: #f9f4e8;
-  box-shadow: 0 10px 20px rgba(19, 34, 56, 0.14);
-}
-
-.secondary-button {
-  background: rgba(19, 34, 56, 0.08);
-  color: #132238;
-}
-
-.primary-button:hover,
-.secondary-button:hover,
-.vote-button:hover {
-  transform: translateY(-1px);
-}
-
-.options-list {
-  list-style: none;
-  margin: 1rem 0 0;
-  padding: 0;
-  display: grid;
-  gap: 0.75rem;
-}
-
-.option-card,
-.empty-state {
-  border-radius: 1.1rem;
-  padding: 1rem;
-  background: rgba(247, 244, 236, 0.95);
-  border: 1px solid rgba(19, 34, 56, 0.08);
-}
-
-.option-card.selected {
-  border-color: rgba(86, 201, 166, 0.85);
-  background: rgba(232, 249, 242, 0.95);
-}
-
-.option-main {
-  align-items: center;
-  justify-content: space-between;
-}
-
-.option-label {
-  margin: 0;
-  font-size: 1.05rem;
-  font-weight: 700;
-}
-
-.option-meta,
-.feedback,
-.room-label {
-  margin: 0.35rem 0 0;
-}
-
-.section-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: baseline;
-  gap: 1rem;
-}
-
-.feedback {
-  min-height: 1.5rem;
-}
-
-code {
-  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
-}
-
-@media (max-width: 720px) {
-  .shell {
-    width: min(100% - 1rem, 920px);
-    padding-top: 1rem;
-  }
-
-  .hero,
-  .share-row,
-  .option-form,
-  .option-main,
-  .section-header {
-    flex-direction: column;
-  }
-
-  .hero-meta {
-    width: 100%;
-    min-width: 0;
-  }
-
-  .primary-button,
-  .secondary-button,
-  .vote-button {
-    width: 100%;
-  }
-}

src/sync.ts

@@ -1,64 +0,0 @@
-import { IndexeddbPersistence } from "y-indexeddb";
-import { WebrtcProvider } from "y-webrtc";
-import * as Y from "yjs";
-
-import { type ConnectionStatus, ensurePollInitialized, type OptionRecord } from "./state";
-
-export interface AppSync {
-  doc: Y.Doc;
-  meta: Y.Map<string>;
-  options: Y.Map<OptionRecord>;
-  votes: Y.Map<string>;
-  provider: WebrtcProvider;
-  persistence: IndexeddbPersistence;
-  getConnectionStatus: () => ConnectionStatus;
-  destroy: () => void;
-}
-
-export function initSync(roomId: string): AppSync {
-  const doc = new Y.Doc();
-  const meta = doc.getMap<string>("poll-meta");
-  const options = doc.getMap<OptionRecord>("poll-options");
-  const votes = doc.getMap<string>("poll-votes");
-
-  ensurePollInitialized(meta);
-
-  let connectionStatus: ConnectionStatus = navigator.onLine ? "connecting" : "offline";
-  const provider = new WebrtcProvider(roomId, doc);
-  const persistence = new IndexeddbPersistence(roomId, doc);
-
-  const syncConnectionStatus = (status: ConnectionStatus) => {
-    connectionStatus = navigator.onLine ? status : "offline";
-  };
-
-  const handleOnline = () => {
-    syncConnectionStatus(provider.connected ? "connected" : "connecting");
-  };
-  const handleOffline = () => {
-    connectionStatus = "offline";
-  };
-
-  provider.on("status", (event: { connected: boolean }) => {
-    syncConnectionStatus(event.connected ? "connected" : "connecting");
-  });
-
-  window.addEventListener("online", handleOnline);
-  window.addEventListener("offline", handleOffline);
-
-  return {
-    doc,
-    meta,
-    options,
-    votes,
-    provider,
-    persistence,
-    getConnectionStatus: () => connectionStatus,
-    destroy: () => {
-      window.removeEventListener("online", handleOnline);
-      window.removeEventListener("offline", handleOffline);
-      persistence.destroy();
-      provider.destroy();
-      doc.destroy();
-    },
-  };
-}

styles.css

@@ -0,0 +1,93 @@
+body {
+    font-family: sans-serif;
+    max-width: 480px;
+    margin: 40px auto;
+    padding: 0 16px;
+}
+
+#add-option {
+    display: flex;
+    gap: 8px;
+    margin-bottom: 8px;
+}
+
+#option-input {
+    flex: 1;
+    padding: 8px;
+    font-size: 1rem;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+}
+
+#duplicate-msg {
+    color: #c00;
+    font-size: 0.9rem;
+    margin-bottom: 12px;
+}
+
+button {
+    padding: 8px 16px;
+    font-size: 1rem;
+    cursor: pointer;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    background: #fff;
+}
+
+button:hover:not(:disabled) {
+    background: #f0f0f0;
+}
+
+button:disabled {
+    opacity: 0.5;
+    cursor: default;
+}
+
+#timer-section {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    margin-bottom: 16px;
+}
+
+.timer.active {
+    font-weight: bold;
+    color: #1a6e1a;
+}
+
+.timer.closed {
+    font-weight: bold;
+    color: #c00;
+}
+
+.option-item {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 10px 12px;
+    border: 1px solid #ddd;
+    border-radius: 4px;
+    margin-bottom: 8px;
+}
+
+.option-label {
+    flex: 1;
+}
+
+.vote-btn {
+    padding: 4px 12px;
+    font-size: 0.9rem;
+    white-space: nowrap;
+}
+
+.vote-btn.voted {
+    background: #e6f4e6;
+    border-color: #4a9e4a;
+    color: #2a6e2a;
+}
+
+
+#copy-btn {
+    margin-top: 16px;
+    width: 100%;
+}

tsconfig.json

@@ -1,15 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "ES2022",
-    "module": "ESNext",
-    "moduleResolution": "Bundler",
-    "lib": ["DOM", "DOM.Iterable", "ES2022"],
-    "strict": true,
-    "noEmit": true,
-    "esModuleInterop": true,
-    "skipLibCheck": true,
-    "allowSyntheticDefaultImports": true,
-    "useDefineForClassFields": true
-  },
-  "include": ["src"]
-}

vite.config.js

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite'
+import wasm from 'vite-plugin-wasm'
+import topLevelAwait from 'vite-plugin-top-level-await'
+
+export default defineConfig({
+  plugins: [wasm(), topLevelAwait()]
+})