diff --git a/js/ckeditor/src/plugins/disabler/disabler.plugin.ts b/js/ckeditor/src/plugins/disabler/disabler.plugin.ts
index a51bac3be..9ad8ccfa3 100644
--- a/js/ckeditor/src/plugins/disabler/disabler.plugin.ts
+++ b/js/ckeditor/src/plugins/disabler/disabler.plugin.ts
@@ -1,6 +1,12 @@
 import { Plugin } from '@ckeditor/ckeditor5-core';
 import {ClassicEditor} from "@ckeditor/ckeditor5-editor-classic";
 
+interface BlockFieldInterface{
+    (element:HTMLElement, isBlocked: boolean):any;
+}
+
+declare var BlockFieldElement: BlockFieldInterface;
+
 export default class Disabler extends Plugin {
 
     static get pluginName() {
@@ -36,11 +42,7 @@ export default class Disabler extends Plugin {
         // @ts-ignore
         const oElement = $(oEditor.ui.element);
         if(typeof oElement.block === 'function') {
-            if (oInputElement.disabled) {
-                oElement.block({message: '', blockMsgClass: '', enableValidation : true, baseZ: 9999, overlayCSS:  { backgroundColor: '#ccd6e066'}});
-            } else {
-                oElement.unblock();
-            }
+            BlockFieldElement(oElement, oInputElement.disabled);
         }
 
         // handle ckeditor read only mode
diff --git a/js/utils.js b/js/utils.js
index 042e118fa..5bb9fc24f 100644
--- a/js/utils.js
+++ b/js/utils.js
@@ -314,6 +314,14 @@ function BlockField(field_id, bBlocked) {
 	}
 }
 
+function BlockFieldElement(element, bBlocked) {
+	if (bBlocked) {
+		element.block({message: '', enableValidation : true, baseZ: 9999, overlayCSS:  { backgroundColor: '#ccd6e066'}});
+	} else {
+		element.unblock();
+	}
+}
+
 /**
  * Updates (enables/disables) a "duration" field
  */