ng-script

scriptDirective.js

/**
 * add a script dynamically to the head of your document
 * use <script ng-src="/path/to/script.js"></script>
 */
 .directive('script', ($parse, $rootScope) => {
    return {
      restrict: 'E',
      terminal: true,
      link: (scope, element, attr) => {
        if (attr.ngSrc) {
          let script = document.createElement('script');
          script.setAttribute('src', attr.ngSrc);
          script.setAttribute('defer', 'defere');
          script.setAttribute('async', 'asunc');
          
          document.head.appendChild(script);
        }
      }
    };
  });