How to read regular expression?

Question

I have this code, I know what it does, but I want to understand how.

var color = "rgb(0, 1, 2)";
var digits = /rgb\((\d+), (\d+), (\d+)\)/.exec(color);

can anyone please explain?

Answer 1

/rgb\\((\\d+), (\\d+), (\\d+)\\)/ :

rgb - string
\\( - symbol (
() - group
\\d - digit
\\d+ - at least one digit symbol
, - string
\\) - symbol )