Re-add externalGlobals

modules/widget-toggles/element-web/package.json

@@ -24,6 +24,7 @@
         "@vitest/coverage-v8": "^4.0.0",
         "react": "^19",
         "typescript": "^6.0.0",
+        "rollup-plugin-external-globals": "^0.13.0",
         "vite": "^8.0.0",
         "vite-plugin-node-polyfills": "^0.28.0",
         "vite-plugin-svgr": "^5.0.0",

modules/widget-toggles/element-web/vite.config.ts

@@ -10,6 +10,7 @@ import { fileURLToPath } from "node:url";
 import { defineConfig, esmExternalRequirePlugin } from "vite";
 import react from "@vitejs/plugin-react";
 import { nodePolyfills } from "vite-plugin-node-polyfills";
+import externalGlobals from "rollup-plugin-external-globals";
 import svgr from "vite-plugin-svgr";
 import { importCSSSheet } from "@arcmantle/vite-plugin-import-css-sheet";
 
@@ -54,5 +55,9 @@ export default defineConfig({
         nodePolyfills({
             include: ["events"],
         }),
+        externalGlobals({
+            // Reuse React from the host app
+            react: "window.React",
+        }),
     ],
 });