Round float and then to locale string

Question

I have some strange example. If I write this:

parseFloat("12345,987").toLocaleString("slv")

the result would be as expected(slv has comma as decimal separator): 12.345,987

But if I round first to 2 decimals:

parseFloat("12345,987").toFixed(2).toLocaleString("slv")

the result would be always with english separator(dot): 12,345.99

How is that possible? It should be: 12.345,99

The output of parseFloat is a number, the output of toFixed is a string. — Etheryte, May 07 '15 at 08:38

score 4 · Answer 1 · edited May 23 '17 at 11:59

As described in this answer, parseFloat() is meant to be used with decimals only and therefore passing in a string with commas can lead to unexpected results.

For example, I tried parseFloat("12345,987").toLocaleString("slv") in JsFiddle and my browser (UK locale) gave me 12.345, which is different to your result.

One other point to note is that toFixed() returns a string but toLocaleString() operates on numbers. Applying toLocaleString() to a string might also produce unexpected results for a different reason.

score 2 · Answer 2 · answered May 07 '15 at 12:22

Thank you. I have found a solution: parseFloat("12345,987").toLocaleString("slv", { minimumFractionDigits: 2, maximumFractionDigits: 2 });

This works ok. "For example, I tried parseFloat("12345,987").toLocaleString("slv")"

"djskinner" - Can you try with: "sl-SI" instead of slv? Does it still doesn't work?

Round float and then to locale string

2 Answers2