diff --git a/packages/corelib/dist/index.d.ts b/packages/corelib/dist/index.d.ts
index 4657621f47..3a270c4648 100644
--- a/packages/corelib/dist/index.d.ts
+++ b/packages/corelib/dist/index.d.ts
@@ -1684,6 +1684,20 @@ export interface PropertyItemsData {
  * @returns The hash or null if no such known registration
  */
 export declare function getScriptDataHash(name: string, reload?: boolean): string;
+/**
+ * Hook for script data related operations
+ */
+export declare const scriptDataHooks: {
+	/**
+	 * Provides a hook to override the default fetchScriptData implementation,
+	 * it falls back to the default implementation if undefined is returned.
+	 * It is recommended to use this hook mainly for test purposes.
+	 * If the sync parameter is true (legacy/compat), then the result should be returned synchronously.
+	 * DynJS parameter is true if the script is requested to be loaded via a dynamic script,
+	 * and not a JSON request. This parameter is only true for the legacy/compat sync mode.
+	 */
+	fetchScriptData: <TData>(name: string, sync?: boolean, dynJS?: boolean) => TData | Promise<TData>;
+};
 /**
  * Fetches a script data with given name via ~/DynamicData endpoint
  * @param name Dynamic script name
diff --git a/packages/corelib/src/base/scriptdata.ts b/packages/corelib/src/base/scriptdata.ts
index 32918d124a..b660c691c2 100644
--- a/packages/corelib/src/base/scriptdata.ts
+++ b/packages/corelib/src/base/scriptdata.ts
@@ -44,6 +44,21 @@ export function getScriptDataHash(name: string, reload?: boolean): string {
     return scriptDataHash[name];
 }
 
+/**
+ * Hook for script data related operations
+ */
+export const scriptDataHooks = {
+    /**
+     * Provides a hook to override the default fetchScriptData implementation,
+     * it falls back to the default implementation if undefined is returned.
+     * It is recommended to use this hook mainly for test purposes.
+     * If the sync parameter is true (legacy/compat), then the result should be returned synchronously.
+     * DynJS parameter is true if the script is requested to be loaded via a dynamic script,
+     * and not a JSON request. This parameter is only true for the legacy/compat sync mode.
+     */
+    fetchScriptData: void 0 as <TData>(name: string, sync?: boolean, dynJS?: boolean) => TData | Promise<TData>
+}
+
 let fetchPromises: { [key: string]: Promise<any> } = {}
 
 /**
@@ -52,6 +67,12 @@ let fetchPromises: { [key: string]: Promise<any> } = {}
  * @returns A promise that will return data if successfull
  */
 export function fetchScriptData<TData>(name: string): Promise<TData> {
+
+    const hookResult = scriptDataHooks.fetchScriptData?.<TData>(name);
+    if (hookResult != void 0) {
+        return Promise.resolve(hookResult);
+    }
+
     let key = name + '?' + (getScriptDataHash(name) ?? '');
 
     var promise: Promise<TData> = fetchPromises[key];
diff --git a/packages/corelib/src/q/scriptdata-compat.ts b/packages/corelib/src/q/scriptdata-compat.ts
index 4874d4a231..2660de69e2 100644
--- a/packages/corelib/src/q/scriptdata-compat.ts
+++ b/packages/corelib/src/q/scriptdata-compat.ts
@@ -1,7 +1,7 @@
 import {
     Lookup, getColumnsScript, getFormScript, getGlobalObject, getLookupAsync, getRemoteDataAsync, getScriptData, getScriptDataHash, handleScriptDataError, peekScriptData, reloadLookupAsync,
     requestFinished, requestStarting,
-    resolveUrl, setScriptData, type PropertyItem, type PropertyItemsData
+    resolveUrl, scriptDataHooks, setScriptData, type PropertyItem, type PropertyItemsData
 } from "../base";
 
 export namespace ScriptData {
@@ -24,6 +24,12 @@ export namespace ScriptData {
         if (data != null)
             return data;
 
+        data = scriptDataHooks.fetchScriptData?.<TData>(name, true, dynJS);
+        if (data !== void 0) {
+            set(name, data);
+            return data;
+        }
+
         var url = resolveUrl(dynJS ? '~/DynJS.axd/' : '~/DynamicData/') + name + (dynJS ? '.js' : '') + '?v=' + (getScriptDataHash(name) ?? new Date().getTime());
         var xhr = new XMLHttpRequest();
         xhr.open("GET", url, false);
@@ -39,14 +45,13 @@ export namespace ScriptData {
                 script.text = xhr.responseText;
                 document.head.appendChild(script).parentNode.removeChild(script);
                 data = peekScriptData(name);
-                if (data == null)
-                    handleScriptDataError(name);
             }
-
-            data = JSON.parse(xhr.responseText);
+            else {
+                data = JSON.parse(xhr.responseText);
+            }
             if (data == null)
                 handleScriptDataError(name);
-            if (name.startsWith("Lookup."))
+            if (!dynJS && name.startsWith("Lookup."))
                 data = new Lookup(data.Params, data.Items);
             set(name, data);
             return data;