How can I parse a string with a comma thousand separator to a number?

Question

I have 2,299.00 as a string and I am trying to parse it to a number. I tried using parseFloat, which results in 2. I guess the comma is the problem

Answer 1

Remove anything that isn't a digit, decimal point, or minus sign (-):

var str = "2,299.00";
str = str.replace(/[^\d\.\-]/g, ""); // You might also include + if you want them to be able to type it
var num = parseFloat(str);

Updated fiddle

Note that it won't work for numbers in scientific notation. If you want it to, change the replace line to add e, E, and + to the list of acceptable characters:

str = str.replace(/[^\d\.\-eE+]/g, "");