Javascript: Converting hexadecimal to decimal

I want to convert hexadecimal value (for i.e. "0xff") to a decimal value, how can I do this?

1. Put your hexadecimal-value into a string and then into a variable, like this below:
var a = "0xff" //don't forget the double-quotes

2. then use a function like this:




I usually dealing hexadecimal value with color.

Test