> For the complete documentation index, see [llms.txt](https://docs.abtasty.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.abtasty.com/server-side/sdks/js-sdk/archived-versions/archived-js-v40x.md).

# v4.0.X

#### Welcome to the Comprehensive Guide for Flagship JavaScript / TypeScript / NodeJS & Deno SDK!

This documentation is your one-stop resource for integrating Flagship into your JavaScript ecosystem, whether it's client-side or server-side. Our library comes with preconfigured methods designed to \[...]

* [Installation](/server-side/sdks/js-sdk/archived-versions/archived-js-v40x/archived-js-v40x-installation.md): Step-by-step instructions to set up Flagship in your environment.
* [Quick Start](/server-side/sdks/js-sdk/archived-versions/archived-js-v40x/archived-js-v40x-quick-start.md): Get up and running with Flagship in no time.
* [Reference](/server-side/sdks/js-sdk/archived-versions/archived-js-v40x/archived-js-v40x-reference.md): Detailed API documentation for in-depth understanding.

## SDK features

This version of the SDK lets you :

* Set a visitor ID
* Update visitor context
* Assign campaigns via the Decision API or via Bucketing Mode
* Get flag
* Manage visitor consent
* Use Experience Continuity
* Activate campaigns
* Send hits to our Universal Collect
* Manage visitor cache

## Prerequisites

| NodeJS                                                     | Deno                                                       |
| ---------------------------------------------------------- | ---------------------------------------------------------- |
| \* Your server/device must have an access to the internet. | \* Your server/device must have an access to the internet. |

## Good to know

| NodeJS                                                                 | Deno                                                                   |
| ---------------------------------------------------------------------- | ---------------------------------------------------------------------- |
| \* Github repository: <https://github.com/flagship-io/flagship-ts-sdk> | \* Github repository: <https://github.com/flagship-io/flagship-ts-sdk> |

> 📘 Javascript SDK - Engine compatibility
>
> Our Javascript SDK is compatible with :
>
> * V8 Engine
> * Node.js runtime
> * Deno

## Versions

#### Change logs

Find the versions change logs on our [Github Repository](https://github.com/flagship-io/flagship-ts-sdk/releases)

## Contact us

Feel free to [contact us](mailto:product.feedback@abtasty.com?subject=Flagship%20Developer%20Documentation) if you have any questions regarding this documentation.


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