From 54190a9804aed586e2f204744f1a561b6267fae3 Mon Sep 17 00:00:00 2001
From: Ruslan Lesiutin <hoxy@meta.com>
Date: Mon, 8 Sep 2025 23:18:21 +0100
Subject: [PATCH] [DevTools] feat: propagate fetchFileWithCaching from
 initialization options for Fusebox

---
 .../react-devtools-fusebox/src/frontend.d.ts  | 40 +++++++++++++------
 .../react-devtools-fusebox/src/frontend.js    |  4 ++
 2 files changed, 31 insertions(+), 13 deletions(-)

diff --git a/packages/react-devtools-fusebox/src/frontend.d.ts b/packages/react-devtools-fusebox/src/frontend.d.ts
index a1142178f47a7..988197e89ca41 100644
--- a/packages/react-devtools-fusebox/src/frontend.d.ts
+++ b/packages/react-devtools-fusebox/src/frontend.d.ts
@@ -5,13 +5,19 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-export type MessagePayload = null | string | number | boolean | { [key: string]: MessagePayload } | MessagePayload[];
-export type Message = { event: string, payload?: MessagePayload };
+export type MessagePayload =
+  | null
+  | string
+  | number
+  | boolean
+  | {[key: string]: MessagePayload}
+  | MessagePayload[];
+export type Message = {event: string; payload?: MessagePayload};
 
 export type WallListener = (message: Message) => void;
 export type Wall = {
-  listen: (fn: WallListener) => Function,
-  send: (event: string, payload?: MessagePayload) => void,
+  listen: (fn: WallListener) => Function;
+  send: (event: string, payload?: MessagePayload) => void;
 };
 
 export type Bridge = {
@@ -22,7 +28,7 @@ export type Bridge = {
 export type Store = Object;
 export type BrowserTheme = 'dark' | 'light';
 export type Config = {
-  supportsReloadAndProfile?: boolean,
+  supportsReloadAndProfile?: boolean;
 };
 
 export function createBridge(wall: Wall): Bridge;
@@ -55,15 +61,23 @@ export type CanViewElementSource = (
   source: ReactFunctionLocation | ReactCallSite,
   symbolicatedSource: ReactFunctionLocation | ReactCallSite | null,
 ) => boolean;
+export type FetchFileWithCaching = (url: string) => Promise<string>;
 
 export type InitializationOptions = {
-  bridge: Bridge,
-  store: Store,
-  theme?: BrowserTheme,
-  viewAttributeSourceFunction?: ViewAttributeSource,
-  viewElementSourceFunction?: ViewElementSource,
-  canViewElementSourceFunction?: CanViewElementSource,
+  bridge: Bridge;
+  store: Store;
+  theme?: BrowserTheme;
+  viewAttributeSourceFunction?: ViewAttributeSource;
+  viewElementSourceFunction?: ViewElementSource;
+  canViewElementSourceFunction?: CanViewElementSource;
+  fetchFileWithCaching?: FetchFileWithCaching;
 };
 
-export function initializeComponents(node: Element | Document, options: InitializationOptions): void;
-export function initializeProfiler(node: Element | Document, options: InitializationOptions): void;
+export function initializeComponents(
+  node: Element | Document,
+  options: InitializationOptions,
+): void;
+export function initializeProfiler(
+  node: Element | Document,
+  options: InitializationOptions,
+): void;
diff --git a/packages/react-devtools-fusebox/src/frontend.js b/packages/react-devtools-fusebox/src/frontend.js
index 2bcd897c4622c..7d09e280233a9 100644
--- a/packages/react-devtools-fusebox/src/frontend.js
+++ b/packages/react-devtools-fusebox/src/frontend.js
@@ -24,6 +24,7 @@ import type {
   ViewAttributeSource,
   ViewElementSource,
 } from 'react-devtools-shared/src/devtools/views/DevTools';
+import type {FetchFileWithCaching} from 'react-devtools-shared/src/devtools/views/Components/FetchFileWithCachingContext';
 import type {Config} from 'react-devtools-shared/src/devtools/store';
 
 export function createBridge(wall?: Wall): FrontendBridge {
@@ -50,6 +51,7 @@ type InitializationOptions = {
   viewAttributeSourceFunction?: ViewAttributeSource,
   viewElementSourceFunction?: ViewElementSource,
   canViewElementSourceFunction?: CanViewElementSource,
+  fetchFileWithCaching?: FetchFileWithCaching,
 };
 
 function initializeTab(
@@ -64,6 +66,7 @@ function initializeTab(
     viewAttributeSourceFunction,
     viewElementSourceFunction,
     canViewElementSourceFunction,
+    fetchFileWithCaching,
   } = options;
   const root = createRoot(contentWindow);
 
@@ -79,6 +82,7 @@ function initializeTab(
       viewAttributeSourceFunction={viewAttributeSourceFunction}
       viewElementSourceFunction={viewElementSourceFunction}
       canViewElementSourceFunction={canViewElementSourceFunction}
+      fetchFileWithCaching={fetchFileWithCaching}
     />,
   );
 }