how to extract decimal number from string using javascript

Question

I want to extract decimal number 265.12 or 0.0 from alphanumeric string (say amount) having value $265.12+ or $265.12- or

Answer 1

You can use regex like this,

Live Demo

var amount = "$265.12+";
var doublenumber = Number(amount.replace(/[^0-9\.]+/g,""));