$.isNumeric vs. isNaN

Question

Is there any difference between $.isNumeric and !isNaN()?

I don\'t see where they will ever return different results.

Answer 1

As PeeHaa says, $.isNumeric() checks whether the value is a number or can be converted to a number, isNaN() checks strictly only whether the value is NaN.

Here's a handy comparison chart that uses the jQuery documentation's examples (comparing $.isNumeric() to !isNaN for easier comparison): http://jsfiddle.net/eghE9/