Implement P2P polling app with Yjs and WebRTC

Uses Yjs CRDTs for conflict-free shared state and y-webrtc for peer-to-peer data exchange. Users can add poll options and vote/unvote, with all changes syncing in real-time across connected peers. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-15 04:32:06 +01:00
parent 4275cbd795
commit a621cc4483
5 changed files with 1768 additions and 0 deletions
--- a/src/style.css
+++ b/src/style.css
@@ -0,0 +1,144 @@
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+  background: #f5f5f5;
+  color: #333;
+  min-height: 100vh;
+}
+
+#app {
+  max-width: 600px;
+  margin: 0 auto;
+  padding: 2rem 1rem;
+}
+
+header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 2rem;
+}
+
+h1 {
+  font-size: 1.5rem;
+}
+
+#status {
+  display: flex;
+  gap: 1rem;
+  font-size: 0.85rem;
+  color: #666;
+}
+
+#connection-status::before {
+  content: "";
+  display: inline-block;
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  margin-right: 4px;
+  vertical-align: middle;
+}
+
+#connection-status.connected::before {
+  background: #4caf50;
+}
+
+#connection-status.connecting::before {
+  background: #ff9800;
+}
+
+#add-option {
+  display: flex;
+  gap: 0.5rem;
+  margin-bottom: 1.5rem;
+}
+
+#option-input {
+  flex: 1;
+  padding: 0.6rem 0.8rem;
+  border: 1px solid #ddd;
+  border-radius: 6px;
+  font-size: 1rem;
+  outline: none;
+}
+
+#option-input:focus {
+  border-color: #2196f3;
+}
+
+#add-btn {
+  padding: 0.6rem 1.2rem;
+  background: #2196f3;
+  color: white;
+  border: none;
+  border-radius: 6px;
+  font-size: 1rem;
+  cursor: pointer;
+}
+
+#add-btn:hover {
+  background: #1976d2;
+}
+
+.poll-option {
+  display: flex;
+  align-items: center;
+  background: white;
+  padding: 0.8rem 1rem;
+  border-radius: 8px;
+  margin-bottom: 0.5rem;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
+}
+
+.option-name {
+  flex: 1;
+  font-size: 1rem;
+}
+
+.vote-count {
+  font-size: 0.9rem;
+  font-weight: 600;
+  color: #666;
+  margin-right: 0.75rem;
+  min-width: 1.5rem;
+  text-align: center;
+}
+
+.vote-btn {
+  padding: 0.4rem 1rem;
+  border: 2px solid #2196f3;
+  border-radius: 6px;
+  font-size: 0.85rem;
+  cursor: pointer;
+  background: white;
+  color: #2196f3;
+}
+
+.vote-btn:hover {
+  background: #e3f2fd;
+}
+
+.vote-btn.voted {
+  background: #2196f3;
+  color: white;
+}
+
+.vote-btn.voted:hover {
+  background: #1976d2;
+}
+
+#empty-state {
+  text-align: center;
+  color: #999;
+  padding: 2rem;
+}
+
+#empty-state.hidden {
+  display: none;
+}