refactor: allow custom impl of backend realod-to-profile support check

packages/react-devtools-shared/src/backend/index.js

@@ -10,6 +10,7 @@
 import Agent from './agent';
 
 import type {DevToolsHook, RendererID, RendererInterface} from './types';
+import {isSynchronousXHRSupported} from './utils';
 
 export type InitBackend = typeof initBackend;
 
@@ -103,3 +104,15 @@ export function initBackend(
     subs.forEach(fn => fn());
   };
 }
+
+function defaultGetIsReloadAndProfileSupported(): boolean {
+  // Notify the frontend if the backend supports the Storage API (e.g. localStorage).
+  // If not, features like reload-and-profile will not work correctly and must be disabled.
+  let isBackendStorageAPISupported = false;
+  try {
+    localStorage.getItem('test');
+    isBackendStorageAPISupported = true;
+  } catch (error) {}
+
+  return isBackendStorageAPISupported && isSynchronousXHRSupported();
+}