Receive only number in money field

Question

I’m looking for a td with jQuery.

var linhaTr = $("tbody").find("tr:first-child");

var tamanhoTd = linhaTr.find("td:nth-child(2)").text();

and he returns me for example R$ 5,00. But I need to get back to make calculations the value 5.00. Take out the R$ and change the comma per point...

Moreover...

I wonder if it is "Regular Expressions" that I need to capture the text in a special way, getting only a few things, I need to study this and do not know the name right.

Answer 1

If the result is R$ 5,00 for example, an initial form may be:

var recuperado = "R$ 5.500,10";
var numero = parseFloat(recuperado.split(" ")[1].replace('.', '').replace(',', '.'));
console.log(typeof numero, numero);

Where the monetary signal is removed, renamed "," to "." and converted to numeric type.

Answer 2

If you want you can use regex, in this case it is to capture the important part in that string. It could be something like this (example):

var parteNumerica = string.match(/[\d\.\,]+/);

But you can just break the string and take out the numerical part as the @Lucas Costa mentioned. In this case it is even more important than the string have that exact format.

Then you can do it like this:

var parteNumerica = string.split(' ').pop();

Examples:

Regex:

var string = 'R$ 5.000,50';
var parteNumerica = string.match(/[\d\.\,]+/);
var numero = Number(parteNumerica ? parteNumerica[0].replace(/\./g, '').replace(',', '.') : 0);
console.log(numero);

Regex-free:

var string = 'R$ 5.000.400,50';
var parteNumerica = string.split(' ').pop();
var numero = Number(parteNumerica ? parteNumerica.split('.').join('').replace(',', '.') : 0);
console.log(numero);