content: [API Reference](https://react.dev/reference/react)
  
  # Directives[Link for this heading]()
  
  ### React Server Components
  
  Directives are for use in [React Server Components](https://react.dev/learn/start-a-new-react-project).
  
  Directives provide instructions to [bundlers compatible with React Server Components](https://react.dev/learn/start-a-new-react-project).
  
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  ## Source code directives[Link for Source code directives]()
  
  - [`'use client'`](https://react.dev/reference/rsc/use-client) lets you mark what code runs on the client.
  - [`'use server'`](https://react.dev/reference/rsc/use-server) marks server-side functions that can be called from client-side code.
  
  [PreviousServer Functions](https://react.dev/reference/rsc/server-functions)
  
  [Next'use client'](https://react.dev/reference/rsc/use-client)