---
title: Javascript-SDK - 4.8.0-beta.2
slug: feature-experimentation/release-notes/javascript-sdk-4-8-0-beta-2
docTags: 
createdAt: 2026-07-20T15:44:41.584Z
---

## \[4.8.0-beta.2]

November 1, 2021

### New Features

\- Removed Client engine validation in the SDK to allow tracking events from new clients without modifying SDK code.

[https://github.com/optimizely/javascript-sdk/releases/tag/v4.8.0-beta.2](https://github.com/optimizely/javascript-sdk/releases/tag/v4.8.0-beta.2)