From 016a53c9eb0445da9578a22dae1950bed7cf19c6 Mon Sep 17 00:00:00 2001
From: bc-maxy <max.yatsenko@bigcommerce.com>
Date: Thu, 3 Sep 2026 15:50:11 +1000
Subject: [PATCH] chore(checkout): CHECKOUT-10115 Remove rolled out
 CHECKOUT-10115 experiment

---
 packages/core/src/app/auto-loader.ts | 16 +++-------------
 packages/core/src/app/loader.test.ts | 28 ++++------------------------
 packages/core/src/app/loader.ts      |  4 +---
 3 files changed, 8 insertions(+), 40 deletions(-)

diff --git a/packages/core/src/app/auto-loader.ts b/packages/core/src/app/auto-loader.ts
index 86b6f81083..0b3e73335a 100644
--- a/packages/core/src/app/auto-loader.ts
+++ b/packages/core/src/app/auto-loader.ts
@@ -16,7 +16,6 @@ export interface CustomCheckoutWindow extends Window {
         publicPath?: string;
         sentryConfig?: BrowserOptions;
         permalinkStatus?: OrderPermalinkStatus | null;
-        isConsistentCrossOriginFixEnabled?: boolean;
     };
 }
 
@@ -31,18 +30,9 @@ function isCustomCheckoutWindow(window: Window): window is CustomCheckoutWindow
         throw new Error('Checkout config is missing.');
     }
 
-    const { renderOrderConfirmation, renderCheckout } = await loadFiles({
-        isConsistentCrossOriginFixEnabled: Boolean(
-            window.checkoutConfig.isConsistentCrossOriginFixEnabled,
-        ),
-    });
-
-    const {
-        orderId,
-        checkoutId,
-        isConsistentCrossOriginFixEnabled: _isConsistentCrossOriginFixEnabled,
-        ...appProps
-    } = window.checkoutConfig;
+    const { renderOrderConfirmation, renderCheckout } = await loadFiles();
+
+    const { orderId, checkoutId, ...appProps } = window.checkoutConfig;
 
     if (orderId) {
         renderOrderConfirmation({ ...appProps, orderId });
diff --git a/packages/core/src/app/loader.test.ts b/packages/core/src/app/loader.test.ts
index 118ba1841a..7f279a2bc3 100644
--- a/packages/core/src/app/loader.test.ts
+++ b/packages/core/src/app/loader.test.ts
@@ -119,44 +119,24 @@ describe('loadFiles', () => {
         );
     });
 
-    it('prefetches dynamic JS chunks listed in manifest', async () => {
+    it('prefetches dynamic JS chunks with crossorigin matching the real chunk requests', async () => {
         await loadFiles(options);
 
         expect(getScriptLoader().preloadScripts).toHaveBeenCalledWith(
             ['https://cdn.foo.bar/step-a.js', 'https://cdn.foo.bar/step-b.js'],
-            { prefetch: true },
+            { prefetch: true, crossOrigin: 'anonymous' },
         );
     });
 
-    it('prefetches dynamic CSS chunks listed in manifest', async () => {
+    it('prefetches dynamic CSS chunks with crossorigin matching the real chunk requests', async () => {
         await loadFiles(options);
 
         expect(getStylesheetLoader().preloadStylesheets).toHaveBeenCalledWith(
             ['https://cdn.foo.bar/step-a.css', 'https://cdn.foo.bar/step-b.css'],
-            { prefetch: true },
+            { prefetch: true, crossOrigin: 'anonymous' },
         );
     });
 
-    describe('when isConsistentCrossOriginFixEnabled is true', () => {
-        it('prefetches dynamic JS chunks with crossorigin matching the real chunk requests', async () => {
-            await loadFiles({ ...options, isConsistentCrossOriginFixEnabled: true });
-
-            expect(getScriptLoader().preloadScripts).toHaveBeenCalledWith(
-                ['https://cdn.foo.bar/step-a.js', 'https://cdn.foo.bar/step-b.js'],
-                { prefetch: true, crossOrigin: 'anonymous' },
-            );
-        });
-
-        it('prefetches dynamic CSS chunks with crossorigin matching the real chunk requests', async () => {
-            await loadFiles({ ...options, isConsistentCrossOriginFixEnabled: true });
-
-            expect(getStylesheetLoader().preloadStylesheets).toHaveBeenCalledWith(
-                ['https://cdn.foo.bar/step-a.css', 'https://cdn.foo.bar/step-b.css'],
-                { prefetch: true, crossOrigin: 'anonymous' },
-            );
-        });
-    });
-
     it('resolves with app version', async () => {
         const result = await loadFiles(options);
 
diff --git a/packages/core/src/app/loader.ts b/packages/core/src/app/loader.ts
index c32b4286e3..01b9207246 100644
--- a/packages/core/src/app/loader.ts
+++ b/packages/core/src/app/loader.ts
@@ -21,7 +21,6 @@ export interface AssetManifest {
 
 export interface LoadFilesOptions {
     publicPath?: string;
-    isConsistentCrossOriginFixEnabled?: boolean;
 }
 
 export interface LoadFilesResult {
@@ -32,7 +31,6 @@ export interface LoadFilesResult {
 
 export function loadFiles(options?: LoadFilesOptions): Promise<LoadFilesResult> {
     const publicPath = configurePublicPath(options && options.publicPath);
-    const isConsistentCrossOriginFixEnabled = Boolean(options?.isConsistentCrossOriginFixEnabled);
 
     const {
         appVersion,
@@ -74,7 +72,7 @@ export function loadFiles(options?: LoadFilesOptions): Promise<LoadFilesResult>
 
     const preloadOptions = {
         prefetch: true,
-        ...(isConsistentCrossOriginFixEnabled && { crossOrigin: 'anonymous' as const }),
+        crossOrigin: 'anonymous' as const,
     };
 
     getScriptLoader().preloadScripts(