From 6198a1151485882e4e27bdd31d112c69fff230ff Mon Sep 17 00:00:00 2001
From: Daniel Roe <daniel@roe.dev>
Date: Mon, 28 Aug 2023 17:46:49 +0100
Subject: [PATCH] fix(nuxt): render server components when `ssr: false`
 (#22869)

---
 packages/nuxt/src/app/components/nuxt-island.ts  | 2 +-
 packages/nuxt/src/core/nuxt.ts                   | 7 +++++++
 packages/nuxt/src/core/runtime/nitro/renderer.ts | 2 +-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/packages/nuxt/src/app/components/nuxt-island.ts b/packages/nuxt/src/app/components/nuxt-island.ts
index 3955b8d8ef..0c4fb8c67b 100644
--- a/packages/nuxt/src/app/components/nuxt-island.ts
+++ b/packages/nuxt/src/app/components/nuxt-island.ts
@@ -171,7 +171,7 @@ export default defineComponent({
 
     if (import.meta.client && !nuxtApp.isHydrating && props.lazy) {
       fetchComponent()
-    } else if (import.meta.server || !nuxtApp.isHydrating) {
+    } else if (import.meta.server || !nuxtApp.isHydrating || !nuxtApp.payload.serverRendered) {
       await fetchComponent()
     }
 
diff --git a/packages/nuxt/src/core/nuxt.ts b/packages/nuxt/src/core/nuxt.ts
index 36ccb593be..03b4f0a398 100644
--- a/packages/nuxt/src/core/nuxt.ts
+++ b/packages/nuxt/src/core/nuxt.ts
@@ -8,6 +8,7 @@ import escapeRE from 'escape-string-regexp'
 import fse from 'fs-extra'
 import { withoutLeadingSlash } from 'ufo'
 /* eslint-disable import/no-restricted-paths */
+import defu from 'defu'
 import pagesModule from '../pages/module'
 import metaModule from '../head/module'
 import componentsModule from '../components/module'
@@ -283,6 +284,12 @@ async function initNuxt (nuxt: Nuxt) {
       priority: 10, // built-in that we do not expect the user to override
       filePath: resolve(nuxt.options.appDir, 'components/nuxt-island')
     })
+
+    if (!nuxt.options.ssr) {
+      nuxt.options.ssr = true
+      nuxt.options.nitro.routeRules ||= {}
+      nuxt.options.nitro.routeRules['/**'] = defu(nuxt.options.nitro.routeRules['/**'], { ssr: false })
+    }
   }
 
   // Add experimental cross-origin prefetch support using Speculation Rules API
diff --git a/packages/nuxt/src/core/runtime/nitro/renderer.ts b/packages/nuxt/src/core/runtime/nitro/renderer.ts
index bc2b75cb9a..13c053a3ca 100644
--- a/packages/nuxt/src/core/runtime/nitro/renderer.ts
+++ b/packages/nuxt/src/core/runtime/nitro/renderer.ts
@@ -259,7 +259,7 @@ export default defineRenderHandler(async (event): Promise<Partial<RenderResponse
     noSSR:
       !!(process.env.NUXT_NO_SSR) ||
       event.context.nuxt?.noSSR ||
-      routeOptions.ssr === false ||
+      (routeOptions.ssr === false && !islandContext) ||
       (import.meta.prerender ? PRERENDER_NO_SSR_ROUTES.has(url) : false),
     head,
     error: !!ssrError,