Easier way to extract a substring in Javascript

Question

I'm trying to extract a substring matching a given pattern from a string in Javascript. Example:

var classProp = 'active category_games',
    match = classProp.match(/category_[a-z]+\b/),
    category;
if(match !== null && match.length > 0){
  category = match[0];
}

Is there an easier way to acheive this? A one-liner, preferably?

Answer 1

Should there be a \b before category?
You could shorten it by supplying an empty array if the match fails;

 category = (classProp.match(/category_[a-z]+\b/) || [""])[0];