Directives are for use in React Server Components.
Directives provide instructions to bundlers compatible with React Server Components.
'use client' lets you mark what code runs on the client.'use server' marks server-side functions that can be called from client-side code.
© 2013–present Facebook Inc.
Licensed under the Creative Commons Attribution 4.0 International Public License.
https://react.dev/reference/rsc/directives