ajinkya-mhetre-mern/backend/src/utils/helpers.js

A MERN starter with frontend and backend folders

// ===== src/utils/helpers.js =====
const generateTrackingNumber = () => {
  const timestamp = Date.now().toString(36).toUpperCase();
  const random = Math.random().toString(36).substr(2, 5).toUpperCase();
  return `FP${timestamp}${random}`;
};

const formatPrice = (price) => {
  return new Intl.NumberFormat('en-IN', {
    style: 'currency',
    currency: 'INR'
  }).format(price);
};

const calculateDeliveryDate = (days = 3) => {
  const date = new Date();
  date.setDate(date.getDate() + days);
  return date;
};

module.exports = {
  generateTrackingNumber,
  formatPrice,
  calculateDeliveryDate
};