From 8405e08c8b6d519b986e599f80a7608254275a1f Mon Sep 17 00:00:00 2001
From: Birk Skyum <birk.skyum@pm.me>
Date: Sun, 15 Mar 2026 18:09:34 +0100
Subject: [PATCH] fix: esm module 99 and cjs module 100

---
 .changeset/cool-needles-hear.md   | 5 +++++
 packages/vite-config/src/index.ts | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/cool-needles-hear.md

diff --git a/.changeset/cool-needles-hear.md b/.changeset/cool-needles-hear.md
new file mode 100644
index 00000000..df987d38
--- /dev/null
+++ b/.changeset/cool-needles-hear.md
@@ -0,0 +1,5 @@
+---
+'@tanstack/vite-config': patch
+---
+
+fix: esm module 99 and cjs module 100
diff --git a/packages/vite-config/src/index.ts b/packages/vite-config/src/index.ts
index 74d87604..c153a236 100644
--- a/packages/vite-config/src/index.ts
+++ b/packages/vite-config/src/index.ts
@@ -57,7 +57,7 @@ export const tanstackViteConfig = (options: Options): UserConfig => {
         exclude: options.exclude,
         tsconfigPath: options.tsconfigPath,
         compilerOptions: {
-          module: 199, // NodeNext
+          module: 99, // ESNext
           declarationMap: false,
         },
         beforeWriteFile: (filePath, content) => {
@@ -83,7 +83,7 @@ export const tanstackViteConfig = (options: Options): UserConfig => {
             exclude: options.exclude,
             tsconfigPath: options.tsconfigPath,
             compilerOptions: {
-              module: 199, // NodeNext
+              module: 100, // CommonJS - Node16
               declarationMap: false,
             },
             beforeWriteFile: (filePath, content) => {