assets/js/scripts.js

@@ -668,13 +668,17 @@ require(['vs/editor/editor.main'], function () {
 
     // On preview
     let el_btn_preview = document.querySelector('#wpPreview');
+    if (el_btn_preview) {
         el_btn_preview.addEventListener('click', event => {
             el_stock_editor.value = window.monaco_editor.getValue();
         });
+    }
 
     // On save
     let el_btn_save = document.querySelector('#wpSave');
+    if (el_btn_save) {
         el_btn_save.addEventListener('click', event => {
             el_stock_editor.value = window.monaco_editor.getValue();
         });
+    }
 });