exec

The exec() function runs a nested flow from inside the current flow. It lets you compose flows while forwarding steps, exits, finalizers, and dependency injection to the outer runner.

Interactive example

Syntax

function exec<
	GenericFlow extends TheFlowFunction | TheFlow | TheFlowGenerator
>(
	theFlow: GenericFlow,
	params?: {
		input?: unknown;
		dependencies?: Record<string, unknown>;
	}
): Generator | AsyncGenerator

Parameters

• theFlow: A flow function, a created flow, or an existing generator to execute.
• params.input: Optional input passed to the nested flow.
• params.dependencies: Optional dependency overrides for the nested execution.

Return value

A generator compatible with the current flow. When the nested flow breaks, exec() returns the break value locally. Other supported effects continue to propagate outward.

See also

• run - Executes the root flow
• create - Creates a reusable flow
• exitIf - Exits a flow from any nested depth