javascript format numbers from 8403.361344537816 to 8.403

Question

I have a javascript to calculate taxes and it works like this

The html form

 <td><input type="text" class="input-180" name="pbruto" id="pbruto" value="0"/></td>
    <td><input type="text" class="input-180" name="pneto" id="pneto" value="0"></td>
    <td><input type="text" class="input-180" name="piva" id="piva" value="0"></td>

The javascript code

<script>
var taxPerc = 1.19; 
document.getElementById("pbruto")
.onkeyup = function(){
document.getElementById("pneto")
.value = parseFloat(document.getElementById("pbruto")
.value) * (1.00 / taxPerc)
document.getElementById("piva")
.value = parseFloat(document.getElementById("pbruto")
.value) - parseFloat(document.getElementById("pneto").value)
}
</script>

The problem is that the results I get from calculations are displayed like this

8403.361344537816

I need to get rid of those .361344537816 and format the number to 8.403 only

Any way to do this?

EDIT No solutions yet

You need to provide more information. What are the DOM values of pbruto/ pneto, what determins where the decimal is on 8.403 — THE AMAZING, Sep 14 '15 at 16:56
possible duplicate of [How to remove digits after decimal using Javascript?](http://stackoverflow.com/questions/12423755/how-to-remove-digits-after-decimal-using-javascript) — THE AMAZING, Sep 14 '15 at 16:57
Ruchard I edited the question now is easy to see. And it is not a duplicated as the solution pointed gives me no solution — noquelequele, Sep 14 '15 at 17:02
Here's another dup: http://stackoverflow.com/a/19840881/1169519 I think that is what you need. — Teemu, Sep 14 '15 at 17:10
That's _the best_ solution in that answer you ever can get ... — Teemu, Sep 14 '15 at 17:36

score 0 · Answer 1 · answered Sep 14 '15 at 17:00

0

Lets say var x is holding the value, try:

x = parseInt(x) / 1000

answered Sep 14 '15 at 17:00

Amir Yahalom

156
2

Edited the question to understand were the info is comming from – noquelequele Sep 14 '15 at 17:03

Teemu · Answer 2 · 2015-09-14T18:25:58.660

It's easier to control the code, if you'd use variables instead of DOM to store values. I've re-written your code, and toLocaleString() method seems to do exactly what you want:

var taxPerc = 1.19;
document.getElementById("pbruto").addEventListener('input', function () {
    var valNeto, valPiva,
     elNeto = document.getElementById("pneto"),
     elBruto = document.getElementById("pbruto"),
        elPiva = document.getElementById("piva"),
        valBruto = +(elBruto.value);

    valNeto = valBruto * (1 / taxPerc);
    valPiva = valBruto - valNeto;
    elNeto.value = Math.round(valNeto).toLocaleString('de-DE');
    elPiva.value = Math.round(valPiva).toLocaleString('de-DE');
});

label {
    display: block;
}

<label>Bruto: <input id="pbruto" /></label>
<label>Neto: <input id="pneto" /></label>
<label>Piva: <input id="piva" /></label>

javascript format numbers from 8403.361344537816 to 8.403

2 Answers2