code: function globalEval (js, url) {
    if (typeof js === T_STRING) {
      var
        node = mkEl('script'),
        root = document.documentElement;
  
      // make the source available in the "(no domain)" tab
      // of Chrome DevTools, with a .js extension
      if (url) { js += '\n//# sourceURL=' + url + '.js'; }
  
      node.text = js;
      root.appendChild(node);
      root.removeChild(node);
    }
  }
docs: evaluates a compiled tag within the global context