variable not defined error in AnjularJs during third party jquery plugin

Question

We are trying to use the third party Jquery plugin to open client view when they click on the button. I have added

<script src="https://testserver.net/1/modules/cdn-latest.js"></script>

I have directive

angular.directive('fileSelector', function() {
return {
templateUrl: 'fileSelectorTemplate.html',
restrict: 'E',
scope: {},
controller: 'fileSelectorController',
controllerAs: 'ctrl',
bindToController: {
  selectionMode: '<?',
  labelI18nKey: '<',
  acceptedFileTypes: '<',
  customClass: '<?',
  disabled: '<?',
  onFileSelect: '&'
},
link: function(scope, element)  {
  element.click(function () {
    CDNView.open({
      language: "en_US",
      theme: {
        color: "#3380FF"
      },
      onSuccess: function (result) {
       
        console.log(result);
      }
    });
  });
}
 };
});

CDNView is in javascript which we including in the html. When I compile it is saying as 'CDNView' is not defined.

How can I integrate this angular1.7?

Regards, Sree