Сделал возможной работу офлайн #5

vite.config.mjs

@@ -1,12 +1,70 @@
 import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
+import { VitePWA } from 'vite-plugin-pwa'
 import path from 'node:path'
 import { fileURLToPath } from 'node:url'
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 export default defineConfig({
-  plugins: [vue()],
+  plugins: [
+    vue(),
+    VitePWA({
+      registerType: 'autoUpdate',
+      includeAssets: ['logo.png', 'favicon.ico'],
+      manifest: {
+        name: 'irandom',
+        short_name: 'irandom',
+        description: 'Random value generator',
+        theme_color: '#1a1815',
+        background_color: '#1a1815',
+        display: 'standalone',
+        orientation: 'any',
+        start_url: '/',
+        scope: '/',
+        lang: 'ru',
+        icons: [
+          {
+            src: '/logo.png',
+            sizes: '192x192',
+            type: 'image/png',
+            purpose: 'any'
+          },
+          {
+            src: '/logo.png',
+            sizes: '512x512',
+            type: 'image/png',
+            purpose: 'any maskable'
+          }
+        ]
+      },
+      workbox: {
+        globPatterns: ['**/*.{js,css,html,ico,png,svg,woff2,webmanifest}'],
+        navigateFallback: '/index.html',
+        navigateFallbackDenylist: [/^\/api/],
+        runtimeCaching: [
+          {
+            urlPattern: ({ url }) => url.pathname.endsWith('/config.js'),
+            handler: 'NetworkFirst',
+            options: {
+              cacheName: 'irandom-config',
+              networkTimeoutSeconds: 3,
+              expiration: {
+                maxEntries: 1,
+                maxAgeSeconds: 60 * 60 * 24 * 30
+              },
+              cacheableResponse: {
+                statuses: [0, 200]
+              }
+            }
+          }
+        ]
+      },
+      devOptions: {
+        enabled: false
+      }
+    })
+  ],
   resolve: {
     alias: {
       '@': path.resolve(__dirname, 'src')