From 705bfc37f6eddea40c21281032474efc65d344ff Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 21 Jan 2021 15:51:29 -0500
Subject: [PATCH] fix: avoid eager hmr api access

---
 packages/plugin-vue/src/main.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/plugin-vue/src/main.ts b/packages/plugin-vue/src/main.ts
index e59fcfe0..c5c40279 100644
--- a/packages/plugin-vue/src/main.ts
+++ b/packages/plugin-vue/src/main.ts
@@ -105,7 +105,8 @@ export async function transformMain(
   if (devServer && !ssr && !isProduction) {
     output.push(`_sfc_main.__hmrId = ${JSON.stringify(descriptor.id)}`)
     output.push(
-      `__VUE_HMR_RUNTIME__.createRecord(_sfc_main.__hmrId, _sfc_main)`
+      `typeof __VUE_HMR_RUNTIME__ !== 'undefined' && ` +
+        `__VUE_HMR_RUNTIME__.createRecord(_sfc_main.__hmrId, _sfc_main)`
     )
     // check if the template is the only thing that changed
     if (prevDescriptor && isOnlyTemplateChanged(prevDescriptor, descriptor)) {