Merge branch 'beta' of https://git.cocorobo.cn/CocoRoboLabs/pbl-teacher-table into beta

src/components/pages/course.vue

@@ -1599,6 +1599,12 @@ export default {
       _this.goToCourse()
     }
   },
+  mounted() {
+    let _this = this
+    window.setCourseUrl = function(){
+      _this.courseUrl = ''
+    }
+  }
 };
 </script>