From e727bb4192ee5e838f8416b798b97bc1ffd183fb Mon Sep 17 00:00:00 2001
From: Daniel Roe <daniel@roe.dev>
Date: Fri, 11 Feb 2022 08:59:52 +0000
Subject: [PATCH] fix(nuxt3): re-enable tree-shaking `definePageMeta` (#3180)

---
 packages/nuxt3/src/pages/macros.ts              | 7 +++++--
 packages/nuxt3/src/pages/runtime/composables.ts | 2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/packages/nuxt3/src/pages/macros.ts b/packages/nuxt3/src/pages/macros.ts
index be80f549e8..7b5b950c25 100644
--- a/packages/nuxt3/src/pages/macros.ts
+++ b/packages/nuxt3/src/pages/macros.ts
@@ -13,9 +13,10 @@ export const TransformMacroPlugin = createUnplugin((options: TransformMacroPlugi
     enforce: 'post',
     transformInclude (id) {
       const { search, pathname } = parseURL(id)
-      return pathname.endsWith('.vue') || parseQuery(search).macro
+      return pathname.endsWith('.vue') || !!parseQuery(search).macro
     },
     transform (code, id) {
+      const originalCode = code
       const { search } = parseURL(id)
 
       // Tree-shake out any runtime references to the macro.
@@ -27,7 +28,9 @@ export const TransformMacroPlugin = createUnplugin((options: TransformMacroPlugi
         }
       }
 
-      if (!parseQuery(search).macro) { return }
+      if (!parseQuery(search).macro) {
+        return originalCode === code ? undefined : code
+      }
 
       // [webpack] Re-export any imports from script blocks in the components
       // with workaround for vue-loader bug: https://github.com/vuejs/vue-loader/pull/1911
diff --git a/packages/nuxt3/src/pages/runtime/composables.ts b/packages/nuxt3/src/pages/runtime/composables.ts
index 52b0f4df5e..8d9a204a86 100644
--- a/packages/nuxt3/src/pages/runtime/composables.ts
+++ b/packages/nuxt3/src/pages/runtime/composables.ts
@@ -25,7 +25,7 @@ declare module 'vue-router' {
 const warnRuntimeUsage = (method: string) =>
   console.warn(
     `${method}() is a compiler-hint helper that is only usable inside ` +
-      '<script setup> of a single file component. Its arguments should be ' +
+      'the script block of a single file component. Its arguments should be ' +
       'compiled away and passing it at runtime has no effect.'
   )