> ## Documentation Index
> Fetch the complete documentation index at: https://launchdarkly-preview.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# SDKs

> This category has guides that teach you how to use LaunchDarkly SDKs.

> For the complete documentation index, see [llms.txt](/llms.txt). For the full documentation snapshot, see [llms-full.txt](/llms-full.txt).

## Overview

These guides help developers learn how to work with the LaunchDarkly SDKs, which evaluate feature flags in your application's code.

* [Unit testing with Jest](/guides/sdk/unit-tests)
* [Use cases for SDK wrappers](/guides/sdk/sdk-wrappers)
* [Using LaunchDarkly without a supported SDK](/guides/sdk/unsupported-sdk)
* [Using mobile SDKs](/guides/sdk/mobile)
* [Using the JavaScript SDK in Salesforce Lightning Web Components](/guides/sdk/lightning-web-components)
* [Using the Lua SDK with HAProxy](/guides/sdk/haproxy)
* [Using the Lua SDK with NGINX](/guides/sdk/nginx)
* [Resilient architecture patterns for LaunchDarkly's SDKs](/guides/sdk/resilience)