javascript convert $ string to number

Question

I have a set of form fields that have values like $1.00, $1654.31 and i would like to convert them to a numerical string only so i can calculate the values.

Im looping over each one, but keep getting NaN when i log to the console.

$("input.costs").each(function( index) {
    console.log( $(this).val()  + parseFloat( $(this).val() )    );
});

each time it returns NaN, im wondering whether there is an easy way to make a dollar value string convert to a numerical value only for calculating ?

thanks in advance

Answer 1

Try

$("input.costs").each(function( index) {
    console.log( $(this).val()  + parseFloat( $(this).val().replace('$','') )    );
});

Answer 2

var numberWithoutDollar = numberWithDollar.replace(/^\$/, '');

Answer 3

You have to remove everything but numbers, . , - and + .

$("input.costs").each(function( index) {
    console.log( $(this).val()  + parseFloat( $(this).val().replace(/[^\d\.\+-]/g, "") )    );
});

Examples:

parseFloat("-1.00".replace(/[^\d\.\+-]/g, ""))
// -1

parseFloat("+1654.31 ".replace(/[^\d\.\+-]/g, ""))
// 1654.31

Answer 4

刚刚跳过美元符号。

parseFloat($(this).val().substr(1))