---
title: Javascript-SDK - 3.4.0-beta
slug: feature-experimentation/release-notes/javascript-sdk-3-4-0-beta
docTags: 
createdAt: 2026-07-20T15:45:20.181Z
---

\## \[3.4.0-beta] - December 18th, 2019
\### Bug fixes
\- Fixed incorrect payload for decision notification triggered by calling getVariation on a feature test in a mutex group(\[#375]\([https://github.com/optimizely/javascript-sdk/pull/375](https://github.com/optimizely/javascript-sdk/pull/375)))

\### New Features

\- Added a new API to get a project configuration static data.
\- Call \`getOptimizelyConfig()\` to get a snapshot copy of project configuration static data.
\- It returns an \`OptimizelyConfig\` instance which includes a datafile revision number, all experiments, and feature flags mapped by their key values.
\- For details, refer to a documention page: [https://docs.developers.optimizely.com/full-stack/docs/optimizelyconfig-javascript-node](docId\:L6LJsIHbEu9LfDd8Kt1fT)

[https://github.com/optimizely/javascript-sdk/releases/tag/v3.4.0-beta](https://github.com/optimizely/javascript-sdk/releases/tag/v3.4.0-beta)