From 2bec45c41cec3f7cf19b4e04b666c0712e5f3ef2 Mon Sep 17 00:00:00 2001
From: Illya Klymov <xanf@xanf.me>
Date: Fri, 27 Aug 2021 18:50:12 +0300
Subject: [PATCH] fix(build): build vue-compat in default exports mode

---
 rollup.config.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rollup.config.js b/rollup.config.js
index 24242dba526..3d389dcc0ab 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -81,7 +81,8 @@ function createConfig(format, output, plugins = []) {
     process.exit(1)
   }
 
-  output.exports = 'named'
+  const isCompatBuild = !!packageOptions.compat
+  output.exports = isCompatBuild ? 'default' : 'named'
   output.sourcemap = !!process.env.SOURCE_MAP
   output.externalLiveBindings = false
 
@@ -91,7 +92,6 @@ function createConfig(format, output, plugins = []) {
   const isBrowserESMBuild = /esm-browser/.test(format)
   const isNodeBuild = format === 'cjs'
   const isGlobalBuild = /global/.test(format)
-  const isCompatBuild = !!packageOptions.compat
   const isCompatPackage = pkg.name === '@vue/compat'
 
   if (isGlobalBuild) {