---
description: JavaScript source layout, ESLint Standard, logging for marketplace-sdk
globs: "**/*.{js,ts}"
alwaysApply: false
---

# JavaScript (lib / test / types)

## Language and layout

- **Source:** `lib/` — ES modules (`import`/`export`). Built outputs in `dist/` (Webpack + Babel); do not hand-edit `dist/`.
- **Tests:** Mocha + Chai in `test/unit/` and `test/sanity-check/`; Jest + TypeScript samples in `test/typescript/`.
- **Types:** Hand-maintained declarations under `types/` (e.g. `types/contentstackClient.d.ts`, `types/marketplace/**`).

## Style

- **ESLint:** `extends: 'standard'` (`.eslintrc.js`), `ecmaVersion: 2020`, `sourceType: 'module'`.
- Prefer explicit, readable names; avoid drive-by reformatting unrelated code.

## Logging

- HTTP logging hooks: `lib/core/messageHandler.js` (`httpLogHandler` referenced from `contentstackHTTPClient`).
- When adding diagnostics, follow existing patterns—do not replace with ad-hoc `console` in core paths unless consistent with `logHandler` usage.

## Dependencies (declared)

Runtime: `axios`, `@contentstack/utils`. Keep `package.json` accurate when adding imports.