Regex for multidimensional input string name to get the the last number between quare brackets

Is there someone to help me with my regex?

I want to match always last integer suquare bracket for every string.

product[attribute][1][0][value] - In this case [0]
product[attribute][9871][56][value] - In this case [56]

Click here for My work:

/\[[0-9,-]+\]/g

The goal is to increment input name on clone, product[attribute][{attribute_id}][{clone_index}][value].

You may use

var s = "product[attribute][1][0][value]";
console.log(s.replace(
            /(.*\[)(\d+)(?=])/, function($0, $1, $2) { 
               return $1 + (Number($2)+1);
            })
)

The regex matches

• (.*\[) - Group 1: any 0+ chars other than line break chars as many as possible and then [
• (\d+) - Group 2: one or more digits
• (?=]) - a ] char must appear immediately to the right of the current location.

Incrementing is done inside the callback method.