---
title: Javascript-SDK - 4.5.1
slug: feature-experimentation/release-notes/javascript-sdk-4-5-1
docTags: 
createdAt: 2026-07-20T15:44:44.131Z
---

## \[4.5.1]

March 2, 2021

### Bug fixes

\- Refactored TypeScript type definitions to have \`OptimizelyUserContext\` and \`OptimizelyDecision\` imported from \`shared\_types\` to provide isolation from internal modules (\[#655]\([https://github.com/optimizely/javascript-sdk/pull/655](https://github.com/optimizely/javascript-sdk/pull/655)))

[https://github.com/optimizely/javascript-sdk/releases/tag/v4.5.1](https://github.com/optimizely/javascript-sdk/releases/tag/v4.5.1)