Nuxt•4w ago

localStorage.getItem is not a function

[CAUSE]
TypeError {
  stack: 'localStorage.getItem is not a function\n' +
  'at getTimelineLayersStateFromStorage (./node_modules/@vue/devtools-kit/dist/index.js:2272:30)\n' +
  'at initStateFactory (./node_modules/@vue/devtools-kit/dist/index.js:2565:26)\n' +
  'at ./node_modules/@vue/devtools-kit/dist/index.js:2569:68)\n' +
  '    at ModuleJob.run (node:internal/modules/esm/module_job:377:25)\n' +
  '    at process.processTicksAndRejections (node:internal/process/task_queues:103:5)\n' +
  '    at async onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:671:26)\n' +
  'at async ViteNodeRunner.interopedImport (./node_modules/vite-node/dist/client.mjs:450:26)\n' +
  'at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:271:20)\n' +
  'at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:189:11)\n' +
  'at async ViteNodeRunner.dependencyRe'... 87 more characters,
  message: 'localStorage.getItem is not a function',
}

[CAUSE]
TypeError {
  stack: 'localStorage.getItem is not a function\n' +
  'at getTimelineLayersStateFromStorage (./node_modules/@vue/devtools-kit/dist/index.js:2272:30)\n' +
  'at initStateFactory (./node_modules/@vue/devtools-kit/dist/index.js:2565:26)\n' +
  'at ./node_modules/@vue/devtools-kit/dist/index.js:2569:68)\n' +
  '    at ModuleJob.run (node:internal/modules/esm/module_job:377:25)\n' +
  '    at process.processTicksAndRejections (node:internal/process/task_queues:103:5)\n' +
  '    at async onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:671:26)\n' +
  'at async ViteNodeRunner.interopedImport (./node_modules/vite-node/dist/client.mjs:450:26)\n' +
  'at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:271:20)\n' +
  'at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:189:11)\n' +
  'at async ViteNodeRunner.dependencyRe'... 87 more characters,
  message: 'localStorage.getItem is not a function',
}

5 Replies

kapa.ai•4w ago

Hi @Nya. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The error localStorage.getItem is not a function typically occurs when code that expects to run in a browser environment (where localStorage is available) is instead running in a Node.js or server-side context, where localStorage does not exist. In Nuxt 3 (and similar SSR frameworks), code can be executed both on the server and the client. If you try to access localStorage on the server, you'll get this error because localStorage is only available in the browser. How to avoid this error: - Only access localStorage on the client side. You can check if your code is running on the client using process.client or typeof window !== 'undefined'. - For state persistence that works both server-side and client-side, consider using cookies via Nuxt's useCookie composable, which is available in both environments and avoids hydration mismatches. This is a recommended approach for persisting user state in Nuxt 3, as shown in this example:

export const useUser = () => useCookie<User | null>('user', {
    default: () => null,
    watch: true,
})

export const useUser = () => useCookie<User | null>('user', {
    default: () => null,
    watch: true,
})

This approach avoids direct use of localStorage and works seamlessly in SSR contexts as well as on the client side Persist State Between Reloads in Nuxt v3. Summary:
You are seeing this error because localStorage is not available on the server. To fix it, ensure any code that uses localStorage only runs on the client, or switch to using cookies for universal state persistence in Nuxt 3. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4w ago

<@324190156771033098> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

NyaOP•4w ago

@kapa.ai it seems related to @vue/devtools-kit which used by @nuxt/devtools

kapa.ai•4w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- Yes, your error is related to @vue/devtools-kit, which is a dependency used by @nuxt/devtools. The stack trace you provided shows that the error originates from @vue/devtools-kit/dist/index.js, specifically when it tries to access localStorage.getItem. This typically happens if code that expects to run in a browser (where localStorage exists) is executed in a server-side or Node.js environment, where localStorage is not available. The knowledge sources do not provide a direct fix for this specific error in @vue/devtools-kit, but they do confirm that @nuxt/devtools uses this package and that issues can arise if browser-only APIs like localStorage are accessed on the server. In Nuxt 3, it is important to ensure that such APIs are only accessed on the client side, or to use alternatives like cookies for universal state persistence, as recommended in the Nuxt community Persist State Between Reloads in Nuxt v3. If this error is occurring within the internals of @vue/devtools-kit or @nuxt/devtools, it may be a bug or an environment misconfiguration. The knowledge sources do not mention a specific patch or workaround for this scenario. If you are using the latest versions and still encounter this, consider reporting the issue to the Nuxt or Vue DevTools maintainers, as it may require an update or fix in the package itself. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4w ago

<@324190156771033098> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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localStorage.getItem is not a function

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