SereneExemplaryConference created by indefinitelee1 - https://repl.it/@indefinitelee1/SereneExemplaryConference

main.js

const dollarFormat = (amount, defaultValue) => {
  console.log(amount)
  if (!amount)
    return defaultValue;
    
  const result = `${parseFloat(amount).toFixed(2)}`.replace(/\B(?=(\d{3})+(?!\d))/g, ',');
  console.log(result)
  if (isNaN(result)) 
    return defaultValue
  else 
    return '$' + result;
} 

const cpm = 44444.44

const otherDollarFormat = (amount, defaultValue) => amount ? `$${parseFloat(amount).toFixed(2)}`.replace(/\B(?=(\d{3})+(?!\d))/g, ',') : defaultValue;

dollarFormat(cpm, '$0' )