fix: emit assets from SSR build (#11430)

Author: Rich-Harris

packages/vite/src/node/build.ts

@@ -208,6 +208,12 @@ export interface BuildOptions {
    * directives in production.
    */
   ssrManifest?: boolean | string
+  /**
+   * Emit assets during SSR.
+   * @experimental
+   * @default false
+   */
+  ssrEmitAssets?: boolean
   /**
    * Set to false to disable reporting compressed chunk sizes.
    * Can slightly improve build speed.
@@ -324,6 +330,7 @@ export function resolveBuildOptions(
     lib: false,
     ssr: false,
     ssrManifest: false,
+    ssrEmitAssets: false,
     reportCompressedSize: true,
     chunkSizeWarningLimit: 500,
     watch: null,

packages/vite/src/node/plugins/asset.ts

@@ -187,7 +187,11 @@ export function assetPlugin(config: ResolvedConfig): Plugin {
 
     generateBundle(_, bundle) {
       // do not emit assets for SSR build
-      if (config.command === 'build' && config.build.ssr) {
+      if (
+        config.command === 'build' &&
+        config.build.ssr &&
+        !config.build.ssrEmitAssets
+      ) {
         for (const file in bundle) {
           if (
             bundle[file].type === 'asset' &&