React-SDK - 2.3.0 – Support Help Center

## [2.3.0] - October 2nd, 2020
Upgrade `@optimizely/optimizely-sdk` to [4.2.1](https://github.com/optimizely/javascript-sdk/releases/tag/v4.2.1)

### New Features
- `useExperiment` and `useFeature` hooks re-render when override user ID or attributes change([#64](https://github.com/optimizely/react-sdk/pull/64))

### Bug fixes
- `useExperiment` and `useFeature` hooks return up-to-date decision values on the first call after the client is ready ([#64](https://github.com/optimizely/react-sdk/pull/64))

https://github.com/optimizely/react-sdk/releases/tag/2.3.0

React-SDK - 2.3.0

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