---
title: React-SDK - 3.3.0
slug: feature-experimentation/release-notes/react-sdk-3-3-0
docTags: 
createdAt: 2026-07-20T15:45:45.291Z
---

## \[3.3.0] - Oct 13, 2025

[#330---oct-13-2025](docId\:QECTSdw8cm5OHU569TFmK)

### New Features

[#new-features](docId\:QECTSdw8cm5OHU569TFmK)

- Added `customHeaders` option to `datafileOptions` for passing custom HTTP headers in datafile requests.

### Bug Fixes

[#bug-fixes](docId\:QECTSdw8cm5OHU569TFmK)

- Fix the EventTags type to allow event properties.
- Fix typo in event.experimentIds field in project config.

[https://github.com/optimizely/react-sdk/releases/tag/3.3.0](https://github.com/optimizely/react-sdk/releases/tag/3.3.0)