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TradeX Chart

Production Checklist

Essential checklist to ensure your TradeX Chart deployment is production-ready.

Pre-Deployment

Code Quality

  • Remove console.log statements

    // Remove all debug logging
// console.log('Debug info')

  • Remove development-only code

    if (process.env.NODE_ENV === 'production') {
  // Production code only
}

  • Minify and bundle code

    npm run build
# Verify output in dist/ folder

  • Enable source maps for debugging

    // webpack.config.js
module.exports = {
  devtool: 'source-map'
}

Performance

  • Optimize bundle size

    # Analyze bundle
npm run build -- --analyze

  • Enable code splitting

    // Lazy load chart component
const TradeXChart = lazy(() => import('./TradeXChart'))

  • Compress assets

    // Enable gzip/brotli compression
app.use(compression())

  • Implement caching strategy

    // Cache static assets
app.use(express.static('public', {
  maxAge: '1y',
  immutable: true
}))

  • Limit data points (5000-10000 max)

    const MAX_CANDLES = 5000
if (data.length > MAX_CANDLES) {
  data = data.slice(-MAX_CANDLES)
}

Security

  • Validate all user inputs

    function validateSymbol(symbol) {
  if (!/^[A-Z]{2,10}$/.test(symbol)) {
    throw new Error('Invalid symbol')
  }
}

  • Sanitize data from external sources

    function sanitizeOHLCV(data) {
  return data.map(candle => [
    parseInt(candle[0]),
    parseFloat(candle[1]),
    parseFloat(candle[2]),
    parseFloat(candle[3]),
    parseFloat(candle[4]),
    parseFloat(candle[5] || 0)
  ])
}

  • Use HTTPS for all API calls

    const API_URL = 'https://api.example.com'

  • Implement rate limiting

    const rateLimit = require('express-rate-limit')

const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100 // limit each IP to 100 requests per windowMs
})

app.use('/api/', limiter)

  • Secure API keys

    // Use environment variables
const API_KEY = process.env.API_KEY

// Never commit .env files
// Add to .gitignore

  • Enable CORS properly

    app.use(cors({
  origin: 'https://yourdomain.com',
  credentials: true
}))

Error Handling

  • Implement global error handler

    window.addEventListener('error', (event) => {
  console.error('Global error:', event.error)
  // Send to error tracking service
  trackError(event.error)
})

  • Handle chart initialization errors

    try {
  await chart.start(config)
} catch (error) {
  console.error('Chart initialization failed:', error)
  showErrorMessage('Failed to load chart')
}

  • Implement fallback for failed data loads

    async function loadChartData() {
  try {
    const data = await fetchData()
    return data
  } catch (error) {
    // Try backup source
    return await fetchDataFromBackup()
  }
}

  • Add error boundaries (React)

    class ErrorBoundary extends React.Component {
  componentDidCatch(error, errorInfo) {
    logError(error, errorInfo)
  }
  render() {
    if (this.state.hasError) {
      return <ErrorFallback />
    }
    return this.props.children
  }
}

Monitoring

  • Set up error tracking

    // Sentry, Rollbar, or similar
Sentry.init({
  dsn: 'YOUR_DSN',
  environment: 'production'
})

  • Implement performance monitoring

    const observer = new PerformanceObserver((list) => {
  for (const entry of list.getEntries()) {
    console.log('Performance:', entry)
  }
})
observer.observe({ entryTypes: ['measure'] })

  • Add analytics tracking

    // Track chart interactions
chart.on('zoom', () => {
  analytics.track('Chart Zoom')
})

chart.on('indicatorAdded', (name) => {
  analytics.track('Indicator Added', { name })
})

  • Monitor API response times

    async function fetchWithTiming(url) {
  const start = performance.now()
  const response = await fetch(url)
  const duration = performance.now() - start
  
  logMetric('api_response_time', duration)
  return response
}

Browser Compatibility

  • Test on target browsers

    • Chrome (latest 2 versions)
    • Firefox (latest 2 versions)
    • Safari (latest 2 versions)
    • Edge (latest 2 versions)

  • Add polyfills if needed

    // core-js for older browsers
import 'core-js/stable'
import 'regenerator-runtime/runtime'

  • Test on mobile devices

    • iOS Safari
    • Chrome Mobile
    • Samsung Internet

  • Verify touch interactions

    // Test pinch zoom, pan, tap
chart.start({
  touch: {
    enabled: true,
    sensitivity: 1.0
  }
})

Accessibility

  • Add ARIA labels

    <tradex-chart 
  role="img" 
  aria-label="Trading chart for BTC/USDT"
></tradex-chart>

  • Ensure keyboard navigation

    chart.start({
  keyboard: {
    enabled: true
  }
})

  • Test with screen readers

  • Provide text alternatives

    <tradex-chart>
  <div class="chart-fallback">
    Current price: $45,000
    24h change: +2.5%
  </div>
</tradex-chart>

Deployment

Build Process

  • Run production build

    npm run build

  • Verify build output

    ls -lh dist/
# Check file sizes

  • Test production build locally

    npm run serve
# Test at http://localhost:5000

CDN Configuration

  • Upload assets to CDN

    aws s3 sync dist/ s3://your-bucket/

  • Set cache headers

    // CloudFront or similar
Cache-Control: public, max-age=31536000, immutable

  • Enable CDN compression

    // Gzip/Brotli at CDN level

  • Configure CDN fallback

    <script src="https://cdn.example.com/chart.js"></script>
<script>
  if (!window.TradeXChart) {
    // Load from backup CDN
    document.write('<script src="https://backup-cdn.example.com/chart.js"><\/script>')
  }
</script>

Environment Variables

  • Set production environment variables

    NODE_ENV=production
API_URL=https://api.production.com
WS_URL=wss://ws.production.com

  • Verify all secrets are set

    # Check .env.production
cat .env.production

SSL/TLS

  • Enable HTTPS

  • Configure SSL certificate

  • Redirect HTTP to HTTPS

    app.use((req, res, next) => {
  if (!req.secure) {
    return res.redirect('https://' + req.headers.host + req.url)
  }
  next()
})

  • Use secure WebSocket (wss://)

    const ws = new WebSocket('wss://api.example.com/ws')

Post-Deployment

Testing

  • Smoke test all features

    • Chart loads correctly
    • Data updates in real-time
    • Indicators work
    • Drawing tools function
    • Export features work

  • Load testing

    # Use tools like Apache Bench, k6, or Artillery
ab -n 1000 -c 10 https://yoursite.com/

  • Test on slow connections

    // Chrome DevTools > Network > Throttling
// Test on 3G, Slow 3G

  • Verify WebSocket connections

    ws.onopen = () => console.log('WebSocket connected')
ws.onerror = (error) => console.error('WebSocket error:', error)

Monitoring

  • Set up uptime monitoring

    • Pingdom
    • UptimeRobot
    • StatusCake

  • Configure alerts

    // Alert on errors > threshold
if (errorRate > 0.05) {
  sendAlert('High error rate detected')
}

  • Monitor resource usage

    • CPU usage
    • Memory usage
    • Network bandwidth

  • Track key metrics

    • Page load time
    • Time to interactive
    • Chart render time
    • API response time

Documentation

  • Update API documentation
  • Document deployment process
  • Create runbook for common issues
  • Document rollback procedure

Backup

  • Backup configuration files
  • Backup database (if applicable)
  • Test restore procedure

Maintenance

Regular Tasks

  • Monitor error logs daily

  • Review performance metrics weekly

  • Update dependencies monthly

    npm outdated
npm update

  • Security audit quarterly

    npm audit
npm audit fix

Updates

  • Test updates in staging first
  • Have rollback plan ready
  • Schedule updates during low-traffic periods
  • Notify users of maintenance windows

Quick Reference

Critical Checks

# 1. Build
npm run build

# 2. Test locally
npm run serve

# 3. Run tests
npm test

# 4. Security audit
npm audit

# 5. Deploy
npm run deploy

# 6. Verify
curl https://yoursite.com/health

Emergency Rollback

# Rollback to previous version
git revert HEAD
npm run build
npm run deploy

# Or use deployment platform rollback
vercel rollback
# or
netlify rollback