Question

I have some input fields in a page and i want to validate if they contain currency values such as $100 or with euro.

Any one have an idea or example?

Answer 1

a regex can validate that for you:

/[\$£¥]\d+(\.\d\d)?/

(but with the euro sign in there too)

this one I’ve given won’t be the most robust way to do it. You could alter to your preference. An alternative is to try something like this:

var myString = "$55.32",
    currency = parseFloat(myString.replace(/^[^\d\.]*/, ''))
    valid = !isNaN(currency)
;

It strips away any non-number or . characters from the start and then parses it as a float.