"use server"

"use server" is the directive string recognized by the server functions compiler.

Import

No import is required for the directive.

Type

const DIRECTIVE = "use server";

Parameters

The directive has no parameters.

Return value

The directive does not return a value.

Behavior

• The compiler uses "use server" as its directive string.
• In client builds, transformed server references use the configured client runtime.
• SSR and server-function builds use the configured server runtime for transformed server references.
• Valid transformed modules are added to the server function manifest.

Examples

Function directive

const logMessage = async (message: string) => {
  "use server";
  console.log(message);
};

File directive

"use server";

export async function logMessage(message: string) {
  console.log(message);
}

Related

• getServerFunctionMeta