---
title: Javascript-SDK - 1.0.0
slug: feature-experimentation/release-notes/javascript-sdk-1-0-0
docTags: 
createdAt: 2026-07-20T15:45:02.592Z
---

\- Introduce support for Full Stack projects in Optimizely X with no breaking changes from previous version.
\- Introduce more graceful exception handling in instantiation and core methods.
\- Update whitelisting to take precedence over audience condition evaluation.
\- Fix bug activating/tracking with attributes not in the datafile.

[https://github.com/optimizely/javascript-sdk/releases/tag/v1.0.0](https://github.com/optimizely/javascript-sdk/releases/tag/v1.0.0)