How to get request headers in Vercel

[lita-jerry]

const ctx = useContext()
console.log(ctx)

on vercel print context:

{
  app: <ref *1> {
    _uid: 1,
    _component: {
      __name: 'App',
      __ssrInlineRender: true,
      setup: [Function (anonymous)]
    },
    _props: null,
    _container: null,
    _context: {
      app: [Circular *1],
      config: [Object],
      mixins: [],
      components: {},
      directives: {},
      provides: [Object: null prototype],
      optionsCache: [WeakMap],
      propsCache: [WeakMap],
      emitsCache: [WeakMap]
    },
    _instance: null,
    version: '3.3.4',
    config: [Getter/Setter],
    use: [Function: use],
    mixin: [Function: mixin],
    component: [Function: component],
    directive: [Function: directive],
    mount: [Function (anonymous)],
    unmount: [Function: unmount],
    provide: [Function: provide],
    runWithContext: [Function: runWithContext]
  },
  router: {
    currentRoute: RefImpl {
      __v_isShallow: true,
      dep: undefined,
      __v_isRef: true,
      _rawValue: [Object],
      _value: [Object]
    },
    listening: true,
    addRoute: [Function: addRoute],
    removeRoute: [Function: removeRoute],
    hasRoute: [Function: hasRoute],
    getRoutes: [Function: getRoutes],
    resolve: [Function: resolve],
    options: { history: [Object], routes: [Array] },
    push: [Function: push],
    replace: [Function: replace],
    go: [Function: go],
    back: [Function: back],
    forward: [Function: forward],
    beforeEach: [Function: add],
    beforeResolve: [Function: add],
    afterEach: [Function: add],
    onError: [Function: add],
    isReady: [Function: isReady],
    install: [Function: install]
  },
  initialRoute: {
    fullPath: '/',
    path: '/',
    query: {},
    hash: '',
    name: 'index',
    params: {},
    matched: [ [Object], [Object] ],
    meta: { layout: 'home' },
    redirectedFrom: undefined,
    href: '/'
  },
  url: URL {
    href: 'http://serverless-q60b0jumf-jerrysir.vercel.app/',
    origin: 'http://serverless-q60b0jumf-jerrysir.vercel.app',
    protocol: 'http:',
    username: '',
    password: '',
    host: 'serverless-q60b0jumf-jerrysir.vercel.app',
    hostname: 'serverless-q60b0jumf-jerrysir.vercel.app',
    port: '',
    pathname: '/',
    search: '',
    searchParams: URLSearchParams {},
    hash: ''
  },
  isClient: false,
  initialState: { pinia: {} },
  redirect: [Function: redirect],
  writeResponse: [Function: p]
}

get request is undefined, bug i will to use headers 'accept-language', how to do 🌚

[lita-jerry]

in App.vue use context on vercel:

import { useContext } from 'vite-ssr'
// ...
const ctx = useContext()
console.log(ctx)
// undefined