Maxim Dolgolyov
fd29acbbdd
Classroom performance: - WebSocket server (ws-server.js) for low-latency cursor & stroke preview Replaces HTTP POST per event → eliminates per-message auth overhead Session member cache (30s TTL) avoids SQLite query per WS message Fallback to HTTP POST when WS not connected - Cursor throttle reduced 100ms → 33ms (~30fps) - Stroke preview throttle reduced 50ms → 20ms - whiteboard.js: render() is now rAF-gated (_doRender/_rafPending) Multiple render() calls within one frame collapse into one repaint document.hidden check — zero CPU when tab is in background visibilitychange listener restores canvas on tab focus Guest board: - guestClassroom.js route: public token-based read-only access - guest-board.html: name entry + read-only whiteboard + SSE - SSE: addGuestClient/removeGuestClient/emitToGuests Screen share picker: - Discord-style modal with tab switching (screen/window/tab) - Live video preview before confirming share - useExistingScreenStream() in ClassroomRTC Fullscreen exit overlay: - #cr-fs-exit-overlay button inside cr-board-wrap - Visible only via CSS :fullscreen selector (touchpad users) File sharing from library: - Teacher picks file from library, sends as styled card in chat - crDownloadLibraryFile() fetches with Bearer auth Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
28 lines
635 B
JSON
28 lines
635 B
JSON
{
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"name": "learnspace-backend",
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"version": "1.0.0",
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"description": "LearnSpace backend",
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"main": "src/server.js",
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"scripts": {
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"start": "node src/server.js",
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"dev": "nodemon src/server.js",
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"migrate": "node src/db/migrate.js",
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"seed": "node src/db/seed.js",
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"test": "node --test tests/*.test.js"
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},
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"dependencies": {
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"bcryptjs": "^2.4.3",
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"compression": "^1.8.1",
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"cors": "^2.8.5",
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"dotenv": "^16.4.5",
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"express": "^4.18.3",
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"jsonwebtoken": "^9.0.2",
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"multer": "^2.1.1",
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"sharp": "^0.34.5",
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"ws": "^8.20.0"
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},
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"devDependencies": {
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"nodemon": "^3.1.0"
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}
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}
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