修改cdn

src/components/course/course-ware.vue

@@ -12,7 +12,7 @@
  * GlobalWorkerOptions.workerSrc需要一个加载路径
 */
 import pdfJS from 'pdfjs-dist/es5/build/pdf';
-pdfJS.GlobalWorkerOptions.workerSrc = '//cdn.bootcdn.net/ajax/libs/pdf.js/2.4.456/pdf.worker.js';
+pdfJS.GlobalWorkerOptions.workerSrc = '//cdn.bootcdn.net/ajax/libs/pdf.js/2.4.456/pdf.worker.min.js';
 import coverImg from '@/images/course/lock-big.png';
 
 export default {