solved discussion

resources/assets/js/components/Navbar.vue

@@ -8,7 +8,7 @@
       <template v-if="user">
             <el-dropdown trigger="click" align="right">
               <el-badge :value="bellBadge > 0 ? bellBadge : ''" class="item">
-                <el-button icon="el-icon-bell" circle @click="RefreshNoti()"></el-button>
+                <el-button icon="el-icon-bell" circle @click="refreshNoti()"></el-button>
               </el-badge>
               <el-dropdown-menu slot="dropdown">
                 <div id="notification">
@@ -120,7 +120,7 @@ export default {
       // Redirect to login.
       this.$router.push({ name: 'login' });
     },
-    RefreshNoti() {
+    refreshNoti() {
       axios.get(this.url).then(response => {
         this.bookingTable = response.data.data
         this.notification = response.data.message.data;