# @launchdarkly/js-client-sdk-common

> LaunchDarkly Client SDK for JavaScript - common code

Latest version **1.35.1** (published 2026-11-04) · Apache-2.0 license · 0 weekly downloads

## Install

```sh
npm install @launchdarkly/js-client-sdk-common
pnpm add @launchdarkly/js-client-sdk-common
yarn add @launchdarkly/js-client-sdk-common
bun add @launchdarkly/js-client-sdk-common
```

## Health

**Score 55/100 (C)** — status: active.

Positive: no vulnerabilities; recently updated; high maintenance score.

Warnings: low downloads; no types; no esm support.

## Facts

| | |
|---|---|
| Version | 1.35.1 |
| Published | 2026-11-04 |
| First published | 2023-12-23 |
| Weekly downloads | 0 |
| License | Apache-2.0 |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 0 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 28 |
| Maintainers | launchdarkly |
| Keywords | launchdarkly, analytics, client |

## Links

- npm: https://www.npmjs.com/package/@launchdarkly/js-client-sdk-common
- Repository: https://github.com/launchdarkly/js-core
- Homepage: https://github.com/launchdarkly/js-core/tree/main/packages/shared/sdk-client
- Issues: https://github.com/launchdarkly/js-core/issues
- npm.io page: https://npm.io/package/@launchdarkly/js-client-sdk-common

## Alternatives

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- [@elastic/elasticsearch](https://npm.io/package/@elastic/elasticsearch.md) — 2.1M weekly downloads
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- [@bbc/http-transport-cache](https://npm.io/package/@bbc/http-transport-cache.md) — 1.2K weekly downloads

## Recent versions

- 1.35.1 (latest) — 2026-11-04
- 1.9.1-beta.2 (prerelease) — 2024-10-17
- 1.35.0 — 2026-11-02
- 1.34.1 — 2026-10-27
- 1.34.0 — 2026-10-16
- 1.33.0 — 2026-10-14
- 1.32.5 — 2026-10-06
- 1.32.4 — 2026-10-05
- 1.32.3 — 2026-10-01
- 1.32.2 — 2026-09-29
- 1.32.1 — 2026-09-22
- 1.32.0 — 2026-09-11
- 1.31.0 — 2026-09-08
- 1.30.2 — 2026-08-06
- 1.30.1 — 2026-07-23
- … 65 more at https://npm.io/package/@launchdarkly/js-client-sdk-common/versions

## README

# LaunchDarkly SDK JavaScript Common Client Code

[![NPM][js-client-sdk-common-npm-badge]][js-client-sdk-common-npm-link]
[![Actions Status][shared-sdk-client-ci-badge]][shared-sdk-client-ci]
[![Documentation][shared-sdk-client-ghp-badge]][shared-sdk-client-ghp-link]

> [!CAUTION]  
> This package is for internal use only. Do not use it directly.

This project contains Typescript classes and interfaces that are applicable to client-side SDKs.

## Contributing

See [Contributing](../CONTRIBUTING.md).

## About LaunchDarkly

- LaunchDarkly is a continuous delivery platform that provides feature flags as a service and allows developers to iterate quickly and safely. We allow you to easily flag your features and manage them from the LaunchDarkly dashboard. With LaunchDarkly, you can:
  - Roll out a new feature to a subset of your users (like a group of users who opt-in to a beta tester group), gathering feedback and bug reports from real-world use cases.
  - Gradually roll out a feature to an increasing percentage of users, and track the effect that the feature has on key metrics (for instance, how likely is a user to complete a purchase if they have feature A versus feature B?).
  - Turn off a feature that you realize is causing performance problems in production, without needing to re-deploy, or even restart the application with a changed configuration file.
  - Grant access to certain features based on user attributes, like payment plan (eg: users on the ‘gold’ plan get access to more features than users in the ‘silver’ plan).
  - Disable parts of your application to facilitate maintenance, without taking everything offline.
- LaunchDarkly provides feature flag SDKs for a wide variety of languages and technologies. Check out [our documentation](https://docs.launchdarkly.com/sdk) for a complete list.
- Explore LaunchDarkly
  - [launchdarkly.com](https://www.launchdarkly.com/ 'LaunchDarkly Main Website') for more information
  - [docs.launchdarkly.com](https://docs.launchdarkly.com/ 'LaunchDarkly Documentation') for our documentation and SDK reference guides
  - [apidocs.launchdarkly.com](https://apidocs.launchdarkly.com/ 'LaunchDarkly API Documentation') for our API documentation
  - [blog.launchdarkly.com](https://blog.launchdarkly.com/ 'LaunchDarkly Blog Documentation') for the latest product updates

[js-client-sdk-common-npm-badge]: https://img.shields.io/npm/v/@launchdarkly/js-client-sdk-common.svg?style=flat-square
[js-client-sdk-common-npm-link]: https://www.npmjs.com/package/@launchdarkly/js-client-sdk-common
[shared-sdk-client-ci-badge]: https://github.com/launchdarkly/js-core/actions/workflows/sdk-client.yml/badge.svg
[shared-sdk-client-ci]: https://github.com/launchdarkly/js-core/actions/workflows/sdk-client.yml
[shared-sdk-client-ghp-badge]: https://img.shields.io/static/v1?label=GitHub+Pages&message=API+reference&color=00add8
[shared-sdk-client-ghp-link]: https://launchdarkly.github.io/js-core/packages/shared/sdk-client/docs/

---
_Source: https://npm.io/package/@launchdarkly/js-client-sdk-common · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._