How to Build a Qr Code Generator

// Using qrcode library
import QRCode from 'qrcode';

async function generateQRCode(data, options = {}) {
  const defaults = {
    width: 300,
    margin: 2,
    color: {
      dark: '#000000',
      light: '#ffffff'
    },
    errorCorrectionLevel: 'M' // L, M, Q, H
  };

  const config = { ...defaults, ...options };

  // Generate as data URL for display
  const dataUrl = await QRCode.toDataURL(data, config);

  // Generate as SVG for download
  const svg = await QRCode.toString(data, { ...config, type: 'svg' });

  return { dataUrl, svg };
}

// WiFi QR code format
function generateWiFiQR(ssid, password, encryption = 'WPA') {
  const data = `WIFI:T:${encryption};S:${ssid};P:${password};;`;
  return generateQRCode(data);
}