---
agentTools:
  projectIndex: https://support.speedcurve.com/llms.txt
---

# RUM update: lux.js v4.4.0

We've released v4.4.0 of lux.js. This release contains the following:

### New features

* Rage click detection
* Extra context in the POST beacon allows calculation of user happiness for each beacon

### Improvements

* Minification optimisations to reduce bundle size

### Bug fixes

* LCP element attribution is stored as the event is received, to prevent missing attribution on discarded elements
* Prevent errors when reading `document.documentElement.clientHeight`