---
id: component/map
name: Implement <Map> ujsx component
status: pending
depends_on:
  - schema/edge-attrs
  - setup/project-init
scope: narrow
risk: low
impact: component
level: implementation
---

## Description

Implement the `Map` ujsx component function. Represents mapping over an array — creates one child instance per array item. Structurally equivalent to a dynamically-generated Parallel group.

## Acceptance Criteria

- [ ] `src/component/map.ts` exports `Map` component function
- [ ] `Map` produces `UElement` with `type: "map"`
- [ ] Props: `over: Signal<unknown[]> | unknown[] | ((results: Record<string, CallResult>) => unknown[])` (required), `as: string` (required), `children: UNode` (required — template rendered per item)
- [ ] The `as` prop names the variable each item is bound to
- [ ] Aggregate completion semantics: all mapped nodes must reach satisfying terminal state for Map to be "completed"; any failed/aborted child makes Map failed/aborted
- [ ] Re-exported from `src/component/index.ts`
- [ ] Unit tests: correct UElement shape with each over form (static, function), as prop preserved

## References

- docs/architecture/workflow-templates.md — Map component, aggregate completion semantics, edge type
- docs/architecture/reactive-execution.md — Map reactive behavior, maxConcurrency interaction

## Notes

> To be filled by implementation agent

## Summary

> To be filled on completion