Conditional comment scripts the vanilla way

x00

Often you see hard coded in theme's default.master stuff like

<!--[if lt IE 9]>
  <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
  <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->

However this not adding resources the vanilla way. In your themehooks file you can do it like so

    //IE only
    $Sender->Head->AddScript("https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js", 'text/javascript', array('ie'=>'lt IE 9'));
    $Sender->Head->AddScript("https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js", 'text/javascript', array('ie'=>'lt IE 9'));