From 476af4304a6a6624d71b14d27183e5a7a9f59ef2 Mon Sep 17 00:00:00 2001
From: pooya parsa <pyapar@gmail.com>
Date: Sat, 4 Jul 2020 15:57:38 +0200
Subject: [PATCH] fix: single chunk is not common

---
 packages/webpack/src/config/client.js | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/packages/webpack/src/config/client.js b/packages/webpack/src/config/client.js
index 2aa3d095f348..7c39f79c5ef1 100644
--- a/packages/webpack/src/config/client.js
+++ b/packages/webpack/src/config/client.js
@@ -74,24 +74,29 @@ export default class WebpackClientConfig extends WebpackBaseConfig {
 
     if (!this.dev && cacheGroups.default && cacheGroups.default.name === undefined) {
       cacheGroups.default.name = (_module, chunks) => {
-        // Use compact name for concatinated modules
-        let compactName = chunks
-          .filter(c => c.name)
+        // Map chunks to names
+        const names = chunks
           .map(c => c.name)
+          .filter(Boolean)
           .sort()
           .map(name => name.replace(/[/\\]/g, '.').replace(/_/g, '').replace('pages.', ''))
-          .join('~')
 
         // Fixes https://github.com/nuxt/nuxt.js/issues/7665
         // TODO: We need a reproduction for this case (test/fixtures/shared-chunk)
-        if (!compactName) {
-          compactName = 'default'
+        if (!names.length) {
+          return 'commons/default'
+        }
+
+        // Single chunk is not common
+        if (names.length === 1) {
+          return names[0]
         }
 
+        // Use compact name for concatinated modules
+        let compactName = names.join('~')
         if (compactName.length > 32) {
           compactName = hash(compactName)
         }
-
         return 'commons/' + compactName
       }
     }