In need your help for a simple javascript regex

Question

I need to get a specific class with javascript. This class is bootstrap's grid : col-md-8

I need to get the number, I try this :

$class = $('div').attr('class');
$number = $class.match(/^col-md-./);

I'm real beginner in regex, please help me.

EDIT : $class may have more class like : 'col col-md-8 col-offset-md-8'

Answer 1

\d+ as pattern.

'col-md-8'.match(/\d+/)
// => ["8"]
'col-md-8'.match(/\d+/)[0]
// => "8"

• \d match a digit character.
• + is repetition modifier: makes previous pattern to match multiple (1 or more) times

---

UPDATE response to the the comment:

Using capturing group:

'other-class-1 col-md-8'.match(/col-md-(\d+)/)[1]
// => "8"

Answer 2

Use simply this: $class.substr(7)