diff --git a/eslint.config.mjs b/eslint.config.mjs
index 97a59e9..a345aef 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -42,7 +42,7 @@ export default [
     },
   },
   {
-    ignores: ['**/*.js', '**/*.mjs', '**/*.d.ts'],
+    ignores: ['**/*.js', '**/*.mjs', '**/*.cjs', '**/*.d.ts'],
   },
   {
     files: ['**/*.test.ts'],
diff --git a/vite.config.base.ts b/vite.config.base.ts
new file mode 100644
index 0000000..d346db2
--- /dev/null
+++ b/vite.config.base.ts
@@ -0,0 +1,11 @@
+import { defineConfig } from 'vitest/config';
+import path from 'path';
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      '@src': path.resolve(__dirname, './src'),
+      '@demo': path.resolve(__dirname, './demo'),
+    },
+  },
+});
diff --git a/vite.config.ghpages.ts b/vite.config.ghpages.ts
index 0753853..a68a23f 100644
--- a/vite.config.ghpages.ts
+++ b/vite.config.ghpages.ts
@@ -1,15 +1,9 @@
-import { defineConfig } from 'vitest/config';
-import path from 'path';
+import { mergeConfig } from 'vitest/config';
+import baseConfig from './vite.config.base';
 
 // https://vitejs.dev/config/
-export default defineConfig({
+export default mergeConfig(baseConfig, {
   base: './',
-  resolve: {
-    alias: {
-      '@src': path.resolve(__dirname, './src'),
-      '@demo': path.resolve(__dirname, './demo'),
-    },
-  },
   build: {
     outDir: './ghpages',
     emptyOutDir: true,
diff --git a/vite.config.ts b/vite.config.ts
index 4a372d3..01cf638 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,16 +1,10 @@
 /// <reference types="vitest" />
-import { defineConfig } from 'vitest/config';
-import path from 'path';
+import { mergeConfig } from 'vitest/config';
 import { playwright } from '@vitest/browser-playwright';
+import baseConfig from './vite.config.base';
 
 // https://vitejs.dev/config/
-export default defineConfig({
-  resolve: {
-    alias: {
-      '@src': path.resolve(__dirname, './src'),
-      '@demo': path.resolve(__dirname, './demo'),
-    },
-  },
+export default mergeConfig(baseConfig, {
   test: {
     browser: {
       enabled: true,