How to remove null decimal part (00) of Javascript number formatting?

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I intend in Javascript to have the following result:

Entree Expected exit
1.6 1,60€
1 1€
1.55 1,55€

I’ve tried to:

num.toLocaleString('pt-PT', {
  minimumFractionDigits: 0,
  maximumFractionDigits: 2
}) + '€';

But unsuccessfully, since, for input 1.6, receiving 1,6€, where I wish for two decimal digits in this type of scenario.

javascript string formatting

  • If you are not going to change the format (at least this is what appears in the table), wouldn’t it be simpler just to concatenate the "€"? if you have "1.55" and want to return the same format I don’t understand why use the toLocaleString

  • @Ricardopontual, the toLocaleString is probably to format the number correctly according to the standard pt-PT. See that 12345.67 is different from 12 345,67 (formatting result).

  • yes, but for what it has examples is not necessary, hence my doubt :)

  • 1

    @Ricardopunctual, it was my mistake in the edition, I just saw it now, thank you! : ) In fact the original examples showed that yes.

  • I need to format, for the pt_EN currency, if the decimal separator is a point it has to be a comma

1 answer

2


The simplest answer is to remove the ,00 manually in case it exists, since there is no format option that covers that format.

function fmt(num) {
  return num
    .toLocaleString('pt-PT', {
      minimumFractionDigits: 2,
      maximumFractionDigits: 2
    })
    .replace(/,00$/, '') + '€';
}

console.log(fmt(1));
console.log(fmt(1.2));
console.log(fmt(1.23));

Note that if formatting is too frequent, it might be worth using a "specialized" API instance Intl.NumberFormat.

  • I’ll take a look Intl.Numberformat, but your solution solved the problem for now, thank you

  • 1

    Can avoid using replace, return num.toLocaleString('pt-PT', {minimumFractionDigits: "0", style:"currency", currency: "EUR", currencyDisplay: "symbol"});

  • 1

    @Augustovasques, I thought about it, but in this case, 1.1 would not be 1,10€, but yes 1,1 €. As far as I can see, it really looks like an extremely customized format that escapes from the same patterns...

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