mixin s-gtm({ id })
  // Google Tag Manager
  script.
    (function(w,d,s,l,i){
      w[l]=w[l]||[];
      w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});
      var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';
      j.async=true;
      j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;
      f.parentNode.insertBefore(j,f);
    })(window,document,'script','dataLayer','#{id}');
