get domain from regex code example

Example 1: regex to get website name from url

/^(?:https?:\/\/)?(?:[^@\n]+@)?(?:www\.)?([^:\/\n?]+)/img

Example 2: javascript regex get domain from url

function url_domain(data) {
  var    a      = document.createElement('a');
         a.href = data;
  return a.hostname;
}