diff --git a/packages/@vue/cli-service/lib/commands/build/demo-lib-js.html b/packages/@vue/cli-service/lib/commands/build/demo-lib-js.html
index 5ae658ca35..0505a3af5d 100644
--- a/packages/@vue/cli-service/lib/commands/build/demo-lib-js.html
+++ b/packages/@vue/cli-service/lib/commands/build/demo-lib-js.html
@@ -7,5 +7,5 @@
 <% } %>
 
 <script>
-console.log(<%- htmlWebpackPlugin.options.libName %>)
+console.log(globalThis['<%- htmlWebpackPlugin.options.libName %>'])
 </script>
diff --git a/packages/@vue/cli-service/lib/commands/build/demo-lib.html b/packages/@vue/cli-service/lib/commands/build/demo-lib.html
index f6513ecfde..4e6c26b7d4 100644
--- a/packages/@vue/cli-service/lib/commands/build/demo-lib.html
+++ b/packages/@vue/cli-service/lib/commands/build/demo-lib.html
@@ -15,13 +15,13 @@
 <% if (htmlWebpackPlugin.options.vueMajor === 3) { %>
 Vue.createApp({
   components: {
-    demo: <%- htmlWebpackPlugin.options.libName %>
+    demo: globalThis['<%- htmlWebpackPlugin.options.libName %>']
   }
 }).mount('#app')
 <% } else { %>
 new Vue({
   components: {
-    demo: <%- htmlWebpackPlugin.options.libName %>
+    demo: globalThis['<%- htmlWebpackPlugin.options.libName %>']
   }
 }).$mount('#app')
 <% } %>