Improvement on the loadScript, still not working with AngularJS

loadScript.js

'use strict';
// src: https://github.com/zenithtekla/mantisbt/blob/r6/plugins/UTILS_plugin/bower_components/mantis_extended_kernel/client/js/buildscript.js
// further ref: http://stackoverflow.com/a/950146/5828821

var loadScript = function(arr){
  var loaded = [];
  var ignored = [];
  for (var i = 0; i < arr.length; i++) {
    var _ = arr[i];

    if (typeof _.ref === 'string') { _.ref = [_.ref]; }
    var type = _.ref[0].slice(_.ref[0].lastIndexOf('.')+1);

    switch (type) {
      case 'js':
        _.ref.forEach(function(file){
          var scripts = document.getElementsByTagName("script");
          for(var i = 0; i < scripts.length; i++){
            var src = scripts[i].getAttribute('src');
            if(src)
              if(src.indexOf(file) > -1){
                ignored.push(file);
                return;
              }
          }
          var link = document.createElement('script');
          link.src = (_.path) ? _.path + file : file;
          link.type = 'text/javascript'; link.async = _.async || false;
          document.getElementsByTagName('body')[0].appendChild(link);
          console.log(link);
          loaded.push(file);
        });
        break;
      case 'css':
        _.ref.forEach(function(file){
          for(var i = 0; i < document.styleSheets.length; i++){
            if(document.styleSheets[i].href.indexOf(file) > -1){
              ignored.push(file);
              return;
            }
          }
          var head  = document.getElementsByTagName('head')[0];
          var link  = document.createElement('link');
          link.rel  = 'stylesheet';
          link.type = _.type || 'text/css';
          link.href = (_.path) ? _.path + file : file;
          head.appendChild(link);
          loaded.push(file);
        });
        break;

      default:
      // code
    }
  }
  if (typeof ignored !== 'undefined' && ignored!= null && ignored.length > 0)
    console.log(loaded, " have been loaded;", ignored, " have been ignored.");
};

Supports the following use for the client-side but not fully function for angularJS. So, bundling is still the applicable way.

<script src="vendor.client.js"></script>
  <script src="vendor.js"></script>
  <script type="text/javascript">
    var scripts = [];
    vendor.js.forEach(function(script){
      scripts.push({ref: script});
    });

    loadScript(scripts);
  </script>