Nuxt/docs/content/3.api/1.composables/use-request-headers.md

useRequestHeaders

Nuxt provides composables and utilities for first-class server-side-rendering support.

Within your pages, components, and plugins you can use useRequestHeaders to access the incoming request headers.

// Get all request headers
const headers = useRequestHeaders()

// Get only cookie request header
const headers = useRequestHeaders(['cookie'])

::alert{icon=👉} In the browser, useRequestHeaders will return an empty object. ::