1const formatToCurrency = amount => {
2  return "$" + amount.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, "$&,");
3};
4formatToCurrency(12.34546); //"$12.35"
5formatToCurrency(42345255.356); //"$42,345,255.36

1function formatToCurrency(amount){
2    return (amount).toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); 
3}
4formatToCurrency(12.34546); //"12.35"
5formatToCurrency(42345255.356); //"42,345,255.36"

1(12345.67).toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,');  // 12,345.67

1function floatToEuro(float){
2    var euroCurrency 
3    euroCurrency = '\u20AC' + float.toLocaleString('nl-NL',{minimumFractionDigits: 2});
4    console.log(euroCurrency);
5    return euroCurrency;
6};

1Steve

1100000000000