💬

Real-Time Chat

Enter a username to join the conversation

\n );\n}\n",[223,125,107],"855874f2-5680-11f1-ad78-ee650bb23af1",["D",1779524541809],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useState, useEffect, useRef, useCallback } from \"https://esm.sh/react@18.2.0\";\n\ninterface Message {\n id: number;\n username: string;\n content: string;\n created_at: string;\n}\n\nexport function ChatRoom({ username, onLeave }: { username: string; onLeave: () => void }) {\n const [messages, setMessages] = useState([]);\n const [input, setInput] = useState(\"\");\n const [sending, setSending] = useState(false);\n const bottomRef = useRef(null);\n const lastIdRef = useRef(0);\n\n // Scroll to bottom\n const scrollToBottom = useCallback(() => {\n bottomRef.current?.scrollIntoView({ behavior: \"smooth\" });\n }, []);\n\n // Load initial messages\n useEffect(() => {\n fetch(\"/api/messages\")\n .then((r) => r.json())\n .then((msgs: Message[]) => {\n setMessages(msgs);\n if (msgs.length > 0) {\n lastIdRef.current = msgs[msgs.length - 1].id;\n }\n setTimeout(scrollToBottom, 100);\n });\n }, []);\n\n // Poll for new messages every 1.5s\n useEffect(() => {\n const interval = setInterval(async () => {\n try {\n const res = await fetch(`/api/messages?after=${lastIdRef.current}`);\n const newMsgs: Message[] = await res.json();\n if (newMsgs.length > 0) {\n lastIdRef.current = newMsgs[newMsgs.length - 1].id;\n setMessages((prev) => [...prev, ...newMsgs]);\n setTimeout(scrollToBottom, 100);\n }\n } catch {}\n }, 1500);\n return () => clearInterval(interval);\n }, [scrollToBottom]);\n\n const sendMessage = async (e: Event) => {\n e.preventDefault();\n const content = input.trim();\n if (!content || sending) return;\n\n setSending(true);\n setInput(\"\");\n try {\n await fetch(\"/api/messages\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ username, content }),\n });\n } catch (err) {\n console.error(\"Failed to send:\", err);\n setInput(content);\n } finally {\n setSending(false);\n }\n };\n\n const formatTime = (dateStr: string) => {\n const d = new Date(dateStr + \"Z\");\n return d.toLocaleTimeString([], { hour: \"2-digit\", minute: \"2-digit\" });\n };\n\n // Generate consistent color from username\n const getColor = (name: string) => {\n const colors = [\n \"text-blue-400\", \"text-green-400\", \"text-yellow-400\", \"text-pink-400\",\n \"text-purple-400\", \"text-cyan-400\", \"text-orange-400\", \"text-red-400\",\n ];\n let hash = 0;\n for (let i = 0; i < name.length; i++) hash = name.charCodeAt(i) + ((hash << 5) - hash);\n return colors[Math.abs(hash) % colors.length];\n };\n\n return (\n

\n {/* Header */}\n

\n 💬\n

Chat Room

\n \n Logged in as {username}\n \n \n Leave\n \n

\n\n {/* Messages */}\n

\n {messages.length === 0 && (\n

🎉

No messages yet. Say hello!

\n )}\n {messages.map((msg) => {\n const isMe = msg.username === username;\n return (\n

\n {!isMe && (\n

\n {msg.username}\n

\n )}\n

{msg.content}

\n {formatTime(msg.created_at)}\n

\n );\n })}\n

\n\n {/* Input */}\n

\n );\n}\n",[223,125,116],"74d59f38-5680-11f1-ab0b-ee650bb23af1",["D",1779524514097],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useState } from \"https://esm.sh/react@18.2.0\";\nimport { JoinScreen } from \"./JoinScreen.tsx\";\nimport { ChatRoom } from \"./ChatRoom.tsx\";\n\nexport function App() {\n const [username, setUsername] = useState(null);\n\n if (!username) {\n return ;\n }\n\n return setUsername(null)} />;\n}\n",[223,125,89],"pulls","branches","forks","envVars",{"_85":26,"_248":26},"connections",{"_85":26,"_247":26},"unfilledCount","emptyCount",{"_37":309,"_13":223,"_76":218,"_47":-5,"_39":40,"_220":44,"_228":24,"_41":310,"_43":26,"_79":126,"_217":-5,"_81":30,"_221":-5,"_264":311,"_17":312},{"_37":216,"_13":125,"_76":124,"_47":218,"_39":40,"_220":44,"_228":24,"_41":306,"_43":26,"_79":126,"_217":-5,"_81":30,"_221":-5,"_264":307,"_17":308},{"_37":236,"_13":89,"_76":88,"_47":124,"_39":40,"_220":92,"_228":24,"_41":303,"_43":44,"_79":80,"_217":238,"_81":30,"_221":-5,"_264":304,"_17":305},{"_37":232,"_13":116,"_76":115,"_47":124,"_39":40,"_220":110,"_228":24,"_41":300,"_43":26,"_79":80,"_217":234,"_81":30,"_221":-5,"_264":301,"_17":302},{"_37":227,"_13":107,"_76":106,"_47":124,"_39":40,"_220":101,"_228":24,"_41":297,"_43":26,"_79":80,"_217":230,"_81":30,"_221":-5,"_264":298,"_17":299},{"_37":289,"_13":290,"_76":291,"_47":218,"_39":40,"_220":292,"_228":24,"_41":293,"_43":44,"_79":21,"_217":294,"_81":30,"_221":-5,"_264":295,"_17":296},{"_37":281,"_13":282,"_76":283,"_47":218,"_39":40,"_220":284,"_228":24,"_41":285,"_43":44,"_79":21,"_217":286,"_81":30,"_221":-5,"_264":287,"_17":288},{"_37":274,"_13":275,"_76":276,"_47":218,"_39":40,"_220":44,"_228":24,"_41":277,"_43":26,"_79":80,"_217":278,"_81":30,"_221":-5,"_264":279,"_17":280},{"_37":267,"_13":268,"_76":269,"_47":-5,"_39":40,"_220":165,"_228":24,"_41":270,"_43":44,"_79":21,"_217":271,"_81":30,"_221":-5,"_264":272,"_17":273},{"_37":259,"_13":260,"_76":138,"_47":-5,"_39":40,"_220":86,"_228":24,"_41":261,"_43":44,"_79":262,"_217":263,"_81":30,"_221":-5,"_264":265,"_17":266},"6db2921a-5680-11f1-ab0b-ee650bb23af1","index.ts",["D",1779524502132],"http","import { parseVal, serveFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { sqlite } from \"https://esm.town/v/std/sqlite/main.ts\";\n\nconst app = new Hono();\n\n// Initialize DB table\nawait sqlite.execute(`CREATE TABLE IF NOT EXISTS messages (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n username TEXT NOT NULL,\n content TEXT NOT NULL,\n created_at TEXT NOT NULL DEFAULT (datetime('now'))\n)`);\n\n// Serve frontend\napp.get(\"/\", () => serveFile(\"/frontend/index.html\"));\napp.get(\"/frontend/**/*\", (c) => serveFile(c.req.path));\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n// GET messages (with optional ?after=ID for polling)\napp.get(\"/api/messages\", async (c) => {\n const after = c.req.query(\"after\");\n let result;\n if (after) {\n result = await sqlite.execute({\n sql: \"SELECT * FROM messages WHERE id > ? ORDER BY id ASC LIMIT 100\",\n args: [Number(after)],\n });\n } else {\n result = await sqlite.execute(\n \"SELECT * FROM messages ORDER BY id DESC LIMIT 50\"\n );\n result.rows = result.rows.reverse();\n }\n return c.json(result.rows);\n});\n\n// POST a new message\napp.post(\"/api/messages\", async (c) => {\n const { username, content } = await c.req.json();\n if (!username || !content) {\n return c.json({ error: \"username and content required\" }, 400);\n }\n if (username.length > 30 || content.length > 500) {\n return c.json({ error: \"username max 30 chars, content max 500 chars\" }, 400);\n }\n const result = await sqlite.execute({\n sql: \"INSERT INTO messages (username, content) VALUES (?, ?)\",\n args: [username.trim(), content.trim()],\n });\n const msg = await sqlite.execute({\n sql: \"SELECT * FROM messages WHERE id = ?\",\n args: [result.lastInsertRowid!],\n });\n return c.json(msg.rows[0], 201);\n});\n\napp.onError((err) => Promise.reject(err));\n\nexport default app.fetch;\n","children",[],[260],"94cb3712-5680-11f1-8d4d-ee650bb23af1","README.md","019e53ec-d349-7646-9450-205558c88142",["D",1779524567723],"# 💬 Real-Time Chat\n\nA real-time chat room built with React + Hono on Val Town. Users enter a username and start chatting instantly — messages appear in real-time via polling.\n\n## Features\n\n- **Username-based join** — enter a name to start chatting\n- **Real-time updates** — messages poll every 1.5 seconds for new content\n- **Persistent history** — last 50 messages loaded on join\n- **Color-coded usernames** — each user gets a unique color\n- **Dark theme** — modern chat UI with bubble-style messages\n\n## Architecture\n\n```mermaid\ngraph LR\n Browser -->|\"GET /\"| Hono[\"index.ts (Hono)\"]\n Hono -->|serves| HTML[\"index.html\"]\n HTML -->|loads| React[\"App.tsx\"]\n React -->|join screen| Join[\"JoinScreen.tsx\"]\n React -->|chat room| Chat[\"ChatRoom.tsx\"]\n Chat -->|\"GET /api/messages\"| API[\"REST API\"]\n Chat -->|\"POST /api/messages\"| API\n API -->|read/write| DB[\"SQLite\"]\n```\n\n## File structure\n\n```\nindex.ts ← Hono backend + API routes\nfrontend/\n index.html ← HTML shell\n index.tsx ← React entrypoint\n favicon.svg ← Chat icon\n components/\n App.tsx ← Root component (routing)\n JoinScreen.tsx ← Username entry screen\n ChatRoom.tsx ← Chat interface with polling\n```\n",[],[268],"6680e2a8-5680-11f1-ab0b-ee650bb23af1","index.tsx","019e53ec-d349-7646-9450-1a1034e4e713",["D",1779524490014],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { createRoot } from \"https://esm.sh/react-dom@18.2.0/client\";\nimport { App } from \"./components/App.tsx\";\n\nconst root = document.getElementById(\"root\");\nif (!root) {\n throw new Error(\"No root element found\");\n}\n\ncreateRoot(root).render();",[],[223,275],"7358e3e0-5680-11f1-9c28-ee650bb23af1","index.html","019e53ec-d349-7646-9450-14eb2b3eb986",3,["D",1779524511608],"\n\n \n \n \n Real-Time Chat\n \n \n \n \n

\n \n \n \n\n",[],[223,282],"88ceb9ca-5680-11f1-ad78-ee650bb23af1","favicon.svg","019e53ec-d349-7646-9450-132e38c5c2e6",8,["D",1779524547616],"\n\n",[],[223,290],["D",1779524523587],[],[223,125,107],["D",1779524541809],[],[223,125,116],["D",1779524514097],[],[223,125,89],["D",1779524490014],[251,252,253],[223,125],"6680e5c8-5680-11f1-ab0b-ee650bb23af1",["D",1779524490014],[250,254,255,256],[223],["D",1779524490014],["D",1789469441210],{"_11":12,"_182":84},{"_11":12,"_177":178,"_83":84,"_31":82,"_179":180,"_181":30},{"_43":165,"_13":16,"_37":40,"_166":128,"_167":73,"_168":169,"_170":132,"_171":172,"_173":174,"_175":14,"_176":12},"ctx",{"_56":-5,"_203":351,"_352":353,"_354":355,"_356":30,"_357":30,"_358":30,"_359":24,"_360":-5,"_361":-7,"_362":-7,"_363":26,"_364":30,"_365":30,"_366":-5,"_367":30,"_368":30,"_369":30,"_370":-5},"ENV",{"_322":323,"_324":325,"_326":16,"_327":328,"_329":330,"_331":332,"_333":334,"_335":336,"_337":338,"_339":340,"_341":342,"_343":344,"_345":346,"_347":348,"_349":350},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

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