# OpenSpec Change: enterprise-react-infinite-scroll

- **Change ID**: enterprise-react-infinite-scroll
- **Package**: `@suaveplan/react-infinite-scroll`
- **Category**: react
- **Target path**: `react/ui/react-infinite-scroll`
- **Status**: PROPOSED
- **Date**: 2026-04-24
- **Reference spec**: `/mnt/s/web/suaveplan/enterprise/react-infinite-scroll.md`

---

## Summary

Deliver `@suaveplan/react-infinite-scroll` on genesis from scratch at enterprise quality. `IntersectionObserver`-based infinite scroll: headless `useInfiniteScroll` hook and batteries-included `InfiniteScroll` component. Genesis replaces `vi.stubGlobal` mocks with real DOM observers (polyfill), adds bidirectional/reverse scroll support, `rootRef` for nested containers, debounce on `onLoadMore`, OTel instrumentation, and Playwright E2E.

---

## Current-state audit (genesis)

Package does not exist on genesis — fresh build.

---

## Available workspace deps on genesis

| Package | Role |
|---|---|
| `@suaveplan/error` (`workspace:^`) | `InfiniteScrollError` |
| `@suaveplan/react-translate` (`workspace:^`) | i18n for end/loading copy |
| `zod` (`catalog:forms`) | Options schema |
| `@opentelemetry/api` (`catalog:observability`) | `infinite_scroll.load` span |

External: `tslib catalog:build`. React 18 peer.

---

## Preserved public API surface

```ts
InfiniteScroll       — sentinel + loading indicator + end message
useInfiniteScroll    — ref callback + isLoading + isEnd state

// Types
InfiniteScrollProps, UseInfiniteScrollOptions
```

---

## New additions for genesis

1. **Real IntersectionObserver** — tests use `intersection-observer` polyfill; no `vi.stubGlobal`.
2. **Bidirectional** — `direction: 'down' | 'up'` prop for reverse-scroll chat patterns.
3. **`rootRef`** — supports nested scroll containers.
4. **`onLoadMore` debounce** — configurable `debounceMs` prevents rapid successive calls.
5. **OTel `infinite_scroll.load` span** — attribute `infinite_scroll.direction`.
6. **Stories** — default, reverse-scroll, nested-container, playground.

---

## File layout

```text
react/ui/react-infinite-scroll/
  package.json
  tsconfig.json
  vitest.config.ts
  src/
    index.ts
    hooks/
      use-infinite-scroll/ (ts + types + md + test + stories + index)
    infinite-scroll/ (tsx + types + md + test + stories + index)
  e2e/
    infinite-scroll.spec.ts
```