From d66d5d422e03bbd5d68a767e651ac809212e0d43 Mon Sep 17 00:00:00 2001
From: keitosuwahara <keitosuwahara0816@gmail.com>
Date: Thu, 17 Jul 2025 12:36:13 +0900
Subject: [PATCH] Eliminate duplicates and improve performance

---
 packages/create-next-app/helpers/is-folder-empty.ts | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/packages/create-next-app/helpers/is-folder-empty.ts b/packages/create-next-app/helpers/is-folder-empty.ts
index 71e867e786646..5b6f213daaed2 100644
--- a/packages/create-next-app/helpers/is-folder-empty.ts
+++ b/packages/create-next-app/helpers/is-folder-empty.ts
@@ -4,7 +4,7 @@ import { join } from 'node:path'
 import { green, blue } from 'picocolors'
 
 export function isFolderEmpty(root: string, name: string): boolean {
-  const validFiles = [
+  const validFiles = new Set([
     '.DS_Store',
     '.git',
     '.gitattributes',
@@ -25,11 +25,12 @@ export function isFolderEmpty(root: string, name: string): boolean {
     'yarn-error.log',
     'yarnrc.yml',
     '.yarn',
-  ]
+    '.vscode'
+  ])
 
   const conflicts = readdirSync(root).filter(
     (file) =>
-      !validFiles.includes(file) &&
+      !validFiles.has(file) &&
       // Support IntelliJ IDEA-based editors
       !/\.iml$/.test(file)
   )