From e781ef33455f40ad0f1e5dbf2e841e00879aeab9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fatih=20Ayg=C3=BCn?= <cyco130@gmail.com>
Date: Wed, 18 Jan 2023 20:20:39 +0300
Subject: [PATCH] feat: add experimental option to skip SSR transform (#11411)

---
 packages/vite/src/node/config.ts                  |  8 ++++++++
 packages/vite/src/node/server/transformRequest.ts | 15 ++++++++-------
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/packages/vite/src/node/config.ts b/packages/vite/src/node/config.ts
index 898f63af090a70..7c5491694b27db 100644
--- a/packages/vite/src/node/config.ts
+++ b/packages/vite/src/node/config.ts
@@ -292,6 +292,14 @@ export interface ExperimentalOptions {
    * @default false
    */
   hmrPartialAccept?: boolean
+  /**
+   * Skips SSR transform to make it easier to use Vite with Node ESM loaders.
+   * @warning Enabling this will break normal operation of Vite's SSR in development mode.
+   *
+   * @experimental
+   * @default false
+   */
+  skipSsrTransform?: boolean
 }
 
 export interface LegacyOptions {
diff --git a/packages/vite/src/node/server/transformRequest.ts b/packages/vite/src/node/server/transformRequest.ts
index f10cfde5ac3b87..fb64c190cce7f6 100644
--- a/packages/vite/src/node/server/transformRequest.ts
+++ b/packages/vite/src/node/server/transformRequest.ts
@@ -266,13 +266,14 @@ async function loadAndTransform(
     }
   }
 
-  const result = ssr
-    ? await server.ssrTransform(code, map as SourceMap, url, originalCode)
-    : ({
-        code,
-        map,
-        etag: getEtag(code, { weak: true }),
-      } as TransformResult)
+  const result =
+    ssr && !server.config.experimental.skipSsrTransform
+      ? await server.ssrTransform(code, map as SourceMap, url, originalCode)
+      : ({
+          code,
+          map,
+          etag: getEtag(code, { weak: true }),
+        } as TransformResult)
 
   // Only cache the result if the module wasn't invalidated while it was
   // being processed, so it is re-processed next time if it is stale