update

src/permission.js

@@ -18,8 +18,8 @@ router.beforeEach(async(to, from, next) => {
   // determine whether the user has logged in
   const hasToken = getToken()
 
-  if (from.query.courseId) {
-    store.commit('app/SET_COURSEID', from.query.courseId)
+  if (to.query.courseId) {
+    store.commit('app/SET_COURSEID', to.query.courseId)
   }
   if (hasToken) {
     if (to.path === '/login') {