Open external links in a new tab/window

script.js

$('a').each(function() {
  var a = new RegExp('/' + window.location.host + '/');
  if(!a.test(this.href)) {
     $(this).click(function(event) {
         event.preventDefault();
         event.stopPropagation();
         window.open(this.href, '_blank');
     });
  }
});