diff --git a/resources/assets/src/js/admin/common.js b/resources/assets/src/js/admin/common.js
deleted file mode 100644
index c423f1cc..00000000
--- a/resources/assets/src/js/admin/common.js
+++ /dev/null
@@ -1,52 +0,0 @@
-'use strict';
-
-$.extend(true, $.fn.dataTable.defaults, {
-    language: trans('vendor.datatables'),
-    scrollX: true,
-    pageLength: 25,
-    autoWidth: false,
-    processing: true,
-    serverSide: true
-});
-
-$.fn.dataTable.ext.errMode = 'none';
-
-function handleDataTablesAjaxError(event, settings, json, xhr) {
-    if (json === null) {
-        showModal(xhr.responseText, trans('general.fatalError'), 'danger');
-    }
-}
-
-async function sendFeedback() {
-    if (document.cookie.replace(/(?:(?:^|.*;\s*)feedback_sent\s*=\s*([^;]*).*$)|^.*$/, '$1') !== '') {
-        return;
-    }
-
-    try {
-        const { errno } = await fetch({
-            url: 'https://work.prinzeugen.net/statistics/feedback',
-            type: 'POST',
-            dataType: 'json',
-            data: {
-                site_name: blessing.site_name,
-                site_url: blessing.base_url,
-                version: blessing.version
-            }
-        });
-        if (errno === 0) {
-            // It will be expired when current session ends
-            document.cookie = 'feedback_sent=' + Date.now();
-
-            console.log('Feedback sent. Thank you!');
-        }
-    } catch (error) {
-        //
-    }
-}
-
-if (process.env.NODE_ENV === 'test') {
-    module.exports = {
-        sendFeedback,
-        handleDataTablesAjaxError,
-    };
-}
diff --git a/resources/assets/src/js/feedback.js b/resources/assets/src/js/feedback.js
new file mode 100644
index 00000000..65735364
--- /dev/null
+++ b/resources/assets/src/js/feedback.js
@@ -0,0 +1,34 @@
+import { queryStringify } from './utils';
+
+async function sendFeedback() {
+    if (document.cookie.replace(/(?:(?:^|.*;\s*)feedback_sent\s*=\s*([^;]*).*$)|^.*$/, '$1') !== '') {
+        return;
+    }
+
+    const response = await fetch('https://work.prinzeugen.net/statistics/feedback', {
+        body: queryStringify({
+            site_name: blessing.site_name,
+            site_url: blessing.base_url,
+            version: blessing.version
+        }),
+        headers: {
+            Accept: 'application/json',
+            'Content-Type': 'application/x-www-form-urlencoded'
+        },
+        method: 'POST',
+        mode: 'cors'
+    });
+
+    if (response.ok) {
+        const { errno } = await response.json();
+
+        if (errno === 0) {
+            // It will be expired when current session ends
+            document.cookie = 'feedback_sent=' + Date.now();
+
+            console.info('Feedback sent. Thank you!');
+        }
+    }
+}
+
+window.sendFeedback = sendFeedback;
diff --git a/resources/assets/src/js/index.js b/resources/assets/src/js/index.js
index 7d5063ad..a0fc5bc5 100644
--- a/resources/assets/src/js/index.js
+++ b/resources/assets/src/js/index.js
@@ -3,6 +3,7 @@ import './i18n';
 import './net';
 import './layout';
 import './logout';
+import './feedback';
 
 console.log(
     `%c Blessing Skin %c v${blessing.version} %c Made with %c<3%c by printempw.%c https://blessing.studio`,
diff --git a/resources/assets/src/js/net.js b/resources/assets/src/js/net.js
index a85d0ad4..518186ab 100644
--- a/resources/assets/src/js/net.js
+++ b/resources/assets/src/js/net.js
@@ -1,4 +1,5 @@
 import Vue from 'vue';
+import { queryStringify } from './utils';
 import { showAjaxError } from './notify';
 
 const csrfField = document.querySelector('meta[name="csrf-token"]');
@@ -27,10 +28,7 @@ export async function walkFetch(request) {
 }
 
 export async function get(url, params = empty) {
-    const qs = Object
-        .keys(params)
-        .map(key => `${encodeURIComponent(key)}=${encodeURIComponent(params[key])}`)
-        .join('&');
+    const qs = queryStringify(params);
 
     return walkFetch(new Request(`${blessing.base_url}${url}${qs && '?' + qs}`, init));
 }
diff --git a/resources/assets/src/js/utils.js b/resources/assets/src/js/utils.js
index 77600737..ff04e0ad 100644
--- a/resources/assets/src/js/utils.js
+++ b/resources/assets/src/js/utils.js
@@ -26,3 +26,16 @@ export function queryString(key, defaultValue) {
         return result[1];
     }
 }
+
+/**
+ * Serialize data to URL query string
+ *
+ * @param {object} data
+ * @returns {string}
+ */
+export function queryStringify(params) {
+    return Object
+        .keys(params)
+        .map(key => `${encodeURIComponent(key)}=${encodeURIComponent(params[key])}`)
+        .join('&');
+}