---
title: Changelog for beacon.min.js · Cloudflare Web Analytics docs
description: Cloudflare occasionally updates the beacon.min.js file to improve
  Web Analytics functionality. The table below includes a log of what changed in
  the beacon.min.js file and when.
lastUpdated: 2025-02-13T19:35:19.000Z
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/web-analytics/changelog/
  md: https://developers.cloudflare.com/web-analytics/changelog/index.md
---

Cloudflare occasionally updates the `beacon.min.js` file to improve Web Analytics functionality. The table below includes a log of what changed in the `beacon.min.js` file and when.

[Subscribe to RSS](https://developers.cloudflare.com/web-analytics/changelog/index.xml)

## 2024-06-11

Enhanced to include reporting of Server-Timing headers.

## 2024-05-22

Introducing new metric fields, transferSize and decodedBodySize are included.

## 2024-04-17

Introducing new metric fields, deliveryType (dt) and navigationType (nt) are included.

## 2023-10-18

Manages A/B testing tags.

## 2023-07-25

Fixed ETag format in the response header.

## 2023-07-13

Fixed the issue that was causing an illegal invocation error.

## 2023-04-19

Reports additional LCP diagnostic information using web-vitals library's attribution build.

## 2023-04-06

Updated webpack configuration to output code in ECMAScript 3 (ES3) format.

## 2023-03-23

Updated Google's web-vitals library (version 3.1.1) and removed experimental `server-timing` header.

## 2022-10-17

Updated to report new metrics such as time to first byte (TTFB), interaction to next paint (INP), and first contentful paint (FCP). Additionally, it reports `navigator.webdriver`, `server-timing` header (experimental), and protocol info (`nextHopProtocol`).

## 2021-12-14

Improved site filtering.

## 2021-11-16

When using the automatic installation feature of the JavaScript Beacon (available only to customers proxied through Cloudflare - also known as orange-clouded customers), [Subresource Integrity (SRI)](https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity) is now enabled by default. SRI is a security feature that enables browsers to verify that resources they fetch are delivered without unexpected manipulation.

## 2021-09-01

Improved to report debugging information for Core Web Vitals.

## 2021-05-28

`startsWith` function replaced with `indexOf` function, which prevents rendering if multiple beacon scripts are loaded.

## 2021-05-12

Reporting endpoint changed from `/cdn-cgi/beacon/performance` to `/cdn-cgi/rum` (for Browser Insights only).
