const formatToCurrency = amount => { return "$" + amount.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, "$&,"); }; formatToCurrency(12.34546); //"$12.35" formatToCurrency(42345255.356); //"$42,345,255.36
(12345.67).toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); // 12,345.67
function formatToCurrency(amount){ return (amount).toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); } formatToCurrency(12.34546); //"12.35" formatToCurrency(42345255.356); //"42,345,255.36"