# @bugsnag/browser-performance

> BugSnag performance monitoring for browsers

Latest version **3.4.1** (published 2026-02-18) · MIT license · 0 weekly downloads

## Install

```sh
npm install @bugsnag/browser-performance
pnpm add @bugsnag/browser-performance
yarn add @bugsnag/browser-performance
bun add @bugsnag/browser-performance
```

## Health

**Score 60/100 (C)** — status: stable.

Positive: has types; esm support; no vulnerabilities; high maintenance score.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 3.4.1 |
| Published | 2026-02-18 |
| First published | 2023-05-26 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Dependencies | 4 |
| Unpacked size | 85.8 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 11 |
| Maintainers | foygl, tomlongridge, twometresteve, ahmed_bugsnag, gingerbenw, joshedney |

## Links

- npm: https://www.npmjs.com/package/@bugsnag/browser-performance
- Repository: https://github.com/bugsnag/bugsnag-js-performance
- Homepage: https://www.bugsnag.com/
- Issues: https://github.com/bugsnag/bugsnag-js-performance/issues
- npm.io page: https://npm.io/package/@bugsnag/browser-performance

## Dependencies (4)

- [@bugsnag/cuid](https://npm.io/package/@bugsnag/cuid.md) ^3.1.1
- [@bugsnag/core-performance](https://npm.io/package/@bugsnag/core-performance.md) ^3.2.0
- [@bugsnag/delivery-fetch-performance](https://npm.io/package/@bugsnag/delivery-fetch-performance.md) ^3.2.0
- [@bugsnag/request-tracker-performance](https://npm.io/package/@bugsnag/request-tracker-performance.md) ^3.2.0

## Recent versions

- 3.4.1 (latest) — 2026-02-18
- 3.2.0-alpha.0 (next) — 2025-10-28
- 0.0.2-alpha.3 (beta) — 2023-06-12
- 3.2.0 — 2025-11-13
- 3.0.0 — 2025-08-13
- 2.15.0 — 2025-08-12
- 2.14.0 — 2025-06-25
- 2.13.0 — 2025-05-15
- 2.12.0 — 2025-03-26
- 2.11.0 — 2025-01-23
- 2.10.1 — 2024-11-12
- 2.10.0 — 2024-09-26
- 2.9.1 — 2024-09-11
- 2.9.0 — 2024-09-05
- 2.8.1-alpha.0 — 2024-08-30
- … 30 more at https://npm.io/package/@bugsnag/browser-performance/versions

## README

<div align="center">
  <a href="https://www.bugsnag.com/platforms/javascript">
    <picture>
      <source media="(prefers-color-scheme: dark)" srcset="https://assets.smartbear.com/m/3dab7e6cf880aa2b/original/BugSnag-Repository-Header-Dark.svg">
      <img alt="SmartBear BugSnag logo" src="https://assets.smartbear.com/m/3945e02cdc983893/original/BugSnag-Repository-Header-Light.svg">
    </picture>
  </a>
  <h1>Performance monitoring for browsers</h1>
</div>

[![Documentation](https://img.shields.io/badge/documentation-latest-blue.svg)](https://docs.bugsnag.com/performance/browser-js/)
[![Build status](https://badge.buildkite.com/a1ed35adfab0cd5f2c0030cc54961209cb720aa5ed2284cb73.svg?branch=main)](https://buildkite.com/bugsnag/bugsnag-js-performance)
[![Node CI](https://github.com/bugsnag/bugsnag-js-performance/actions/workflows/node-ci.yml/badge.svg)](https://github.com/bugsnag/bugsnag-js-performance/actions/workflows/node-ci.yml)

Monitor the page load speed, capture [WebVitals](https://web.dev/vitals/) and take other measurements in your web app and see the results in your [BugSnag](https://www.bugsnag.com) dashboard.

## Features

- Reporting of page loads with WebVital metrics
- Automatic measurement of fetch and XHR request times
- Start and end your own spans to record custom parts of your code

## Getting started

_This functionality is currently in its preview phase – please [contact us](mailto:support@bugsnag.com) for more information._

For integration instructions, see our online docs: [docs.bugsnag.com/performance/browser-js](https://docs.bugsnag.com/performance/browser-js)

## Pre-releases

We are currently publishing pre-1.0 releases. These releases may contain breaking changes, which are documented in the [CHANGELOG.md](./CHANGELOG.md).

## Support
* [Read the integration guide](https://docs.bugsnag.com/performance/browser-js/)
* [Search open and closed issues](https://github.com/bugsnag/bugsnag-js-performance/issues?utf8=✓&q=is%3Aissue) for similar problems
* [Report a bug or request a feature](https://github.com/bugsnag/bugsnag-js-performance/issues/new)

## License

The BugSnag JavaScript Performance SDK is free software released under the MIT License. See the [LICENSE](https://github.com/bugsnag/bugsnag-js-performance/blob/master/LICENSE) for details.

---
_Source: https://npm.io/package/@bugsnag/browser-performance · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._