---
title: React-SDK - 2.0.0-alpha.2
slug: feature-experimentation/release-notes/react-sdk-2-0-0-alpha-2
docTags: 
createdAt: 2026-07-20T15:44:29.366Z
---

\## \[2.0.0-alpha.2] - April 3rd, 2020

\### Breaking Changes

\- Upgrade \`@optimizely/optimizely-sdk\` to 4.0.0-alpha.1. \`Promise\` polyfill no longer included. See \[@optimizely/optimizely-sdk Release 4.0.0-alpha.1]\([https://github.com/optimizely/javascript-sdk/releases/tag/v4.0.0-alpha.1](https://github.com/optimizely/javascript-sdk/releases/tag/v4.0.0-alpha.1)) for more details.

[https://github.com/optimizely/react-sdk/releases/tag/2.0.0-alpha.2](https://github.com/optimizely/react-sdk/releases/tag/2.0.0-alpha.2)