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

setResponseStatus sets the statusCode (and optionally the statusMessage) of the response.

setResponseStatus can only be called within component setup functions, plugins, and route middleware.

const event = useRequestEvent()
// Set the status code to 404 for a custom 404 page
setResponseStatus(event, 404)
// Set the status message as well
setResponseStatus(event, 404, 'Page Not Found')

In the browser, setResponseStatus will have no effect.