diff --git a/package.json b/package.json
index f25e0a6a..2d6e5b97 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "dev": "vite",
     "start": "npm run build:main && electron ./dist/main/app.js",
     "build:fe": "vue-tsc --noEmit --esModuleInterop true && vite build",
+    "build:fe-demo": "yarn run build:fe --mode=demo && node scripts/copy-assets.js && cp help/* dist/renderer/",
     "serve:fe": "vite preview",
     "build:main": "tsc --esModuleInterop true src/main/app.ts --outDir ./dist/main && node ./scripts/copy-assets.js",
     "build": "npm run build:fe && npm run build:main",
diff --git a/src/renderer/demo.ts b/src/renderer/demo.ts
index f1cc0eed..bbdb93ad 100644
--- a/src/renderer/demo.ts
+++ b/src/renderer/demo.ts
@@ -3,6 +3,8 @@ import { useToast } from './useful/toast'
 import file from './useful/file'
 
 if (FLAG_DEMO) {
+  localStorage.clear()
+
   const xFetch = window.fetch
   const cache: {[key: string]: string} = {}
 
diff --git a/src/renderer/useful/global-args.ts b/src/renderer/useful/global-args.ts
index 69282501..d1986e95 100644
--- a/src/renderer/useful/global-args.ts
+++ b/src/renderer/useful/global-args.ts
@@ -6,4 +6,4 @@ export const URL_GITHUB = 'https://github.com/purocean/yn'
 export const URL_MAS = 'https://apps.apple.com/cn/app/yank-note/id1551528618'
 
 export const FLAG_DISABLE_XTERM = false
-export const FLAG_DEMO = import.meta.env.NODE_ENV === 'demo'
+export const FLAG_DEMO = import.meta.env.MODE === 'demo'