From 391672008d0cb421b9625e0bb49755ccf5e6dcf8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nacho=20Codo=C3=B1er?= <igcogi@gmail.com>
Date: Thu, 20 Nov 2025 09:52:46 +0100
Subject: [PATCH] refactor globalThis polyfill to improve legacy support

---
 .../plugins/RequireExtenalsPlugin.js            | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/npm-packages/meteor-rspack/plugins/RequireExtenalsPlugin.js b/npm-packages/meteor-rspack/plugins/RequireExtenalsPlugin.js
index 205863dbad..fb400a4382 100644
--- a/npm-packages/meteor-rspack/plugins/RequireExtenalsPlugin.js
+++ b/npm-packages/meteor-rspack/plugins/RequireExtenalsPlugin.js
@@ -443,13 +443,18 @@ class RequireExternalsPlugin {
 
   _ensureGlobalThisModule() {
     const block = [
-      `/* Polyfill globalThis.module & exports */`,
-      `if (typeof globalThis.module === 'undefined') {`,
-      `  globalThis.module = { exports: {} };`,
+      `/* Polyfill globalThis.module, exports & module for legacy */`,
+      `if (typeof globalThis !== 'undefined') {`,
+      `  if (typeof globalThis.module === 'undefined') {`,
+      `    globalThis.module = { exports: {} };`,
+      `  }`,
+      `  if (typeof globalThis.exports === 'undefined') {`,
+      `    globalThis.exports = globalThis.module.exports;`,
+      `  }`,
+      `}`,
+      `if (typeof window.module === 'undefined') {`,
+      `  window.module = { exports: {} };`,
       `}`,
-      `if (typeof globalThis.exports === 'undefined') {`,
-      `  globalThis.exports = globalThis.module.exports;`,
-      `}`
     ].join('\n') + '\n';
 
     let content = '';