Sample JavaScript file

// Sample JavaScript module — samplefiles.com
export class Customer {
  constructor(id, name, balance) {
    this.id = id;
    this.name = name;
    this.balance = balance;
  }

  get isVip() {
    return this.balance >= 10_000;
  }
}

export const totalBalance = (customers) => customers.reduce((sum, c) => sum + c.balance, 0);

const customers = [new Customer(1, 'Ada', 12_500), new Customer(2, 'Grace', 830.5), new Customer(3, 'Linus', 10_000)];
for (const c of customers) {
  console.log(`${c.name.padEnd(6)} ${c.balance.toFixed(2).padStart(10)} ${c.isVip ? 'VIP' : ''}`);
}
console.log(`Total: ${totalBalance(customers).toFixed(2)}`);