Installation

bash

npm install @haskou/metrics

Or with Yarn:

bash

yarn add @haskou/metrics

The core requires ES2022 and performance.now() (or a supplied ClockPort). The package does not declare a Node.js version range; this does not promise support for every historical Node.js release. It ships ESM, CommonJS, source maps, and declarations for both module formats. Node imports and requires share one runtime across public entrypoints; browser bundlers select native ESM.

Compatibility checks cover Node.js 22, 24 and 26 and a browser bundle executed without Node globals. Other runtimes are not yet verified. Repository development uses Node.js 24.18.0 independently of consumer requirements.

Node.js selects CPU and memory sampling automatically when the corresponding options are enabled. Browsers omit these measurements. You can supply a custom resourceUsage adapter when needed. The Prometheus integration is Node-specific.

@Metrics supports standard TypeScript decorators without additional compiler flags. For projects that still use legacy decorators, enable:

json

{
  "compilerOptions": {
    "experimentalDecorators": true
  }
}

Optional integrations keep their vendor packages outside the core install:

Prometheus and Grafana uses prom-client.
Winston uses winston through LoggerPort.

Installation ​

Installation