A package to allow logging and monitoring with sentry

Usage no npm install needed!

<script type="module">
  import toruslabsLoglevelSentry from 'https://cdn.skypack.dev/@toruslabs/loglevel-sentry';



npm version npm


This repo allows you to log + track logs using sentry


  • Typescript compatible. Includes Type definitions



This module is distributed in 4 formats

  • esm build dist/loglevelSentry.esm.js in es6 format
  • commonjs build dist/loglevelSentry.cjs.js in es5 format
  • umd build dist/loglevelSentry.umd.min.js in es5 format without polyfilling corejs minified
  • node build dist/loglevelSentry-node.js in es5 format

By default, the appropriate format is used for your specified usecase You can use a different format (if you know what you're doing) by referencing the correct file

The cjs build is not polyfilled with core-js. It is upto the user to polyfill based on the browserlist they target

Directly in Browser

CDN's serve the non-core-js polyfilled version by default. You can use a different


<script src="https://cdn.jsdelivr.net/npm/@toruslabs/loglevel-sentry"></script>


<script src="https://unpkg.com/@toruslabs/loglevel-sentry"></script>


Add @toruslabs/loglevel-sentry to your project:

To use this module:

  1. Install the package npm i @toruslabs/loglevel-sentry

  2. Create your loglevel instance and install this plugin to enable Sentry:

import loglevel from "loglevel";
import * as Sentry from "@sentry/browser";
// Node.js: import * as Sentry from "@sentry/node";
import LoglevelSentryPlugin from "@toruslabs/loglevel-sentry";

logger = loglevel.getLogger("__LOGGER_NAME__");

const plugin = new LoglevelSentryPlugin(Sentry);

(Optional) You can replace loglevel with other logging library by using loglevel methodFactory API:

import loglevel from "loglevel";
import pino from "pino";
import * as Sentry from "@sentry/browser";
// Node.js: import * as Sentry from "@sentry/node";
import LoglevelSentryPlugin from "@toruslabs/loglevel-sentry";

const logger = loglevel.getLogger("__LOGGER_NAME__");
logger.methodFactory = (method, level, name) => {
  const alt = pino(name, level);
  return alt[method];

const sentry = new LoglevelSentryPlugin(Sentry);


Is 100% compatible with loglevel API. Events/errors will be reported for all enabled log functions.

Best practices

Though it isn't compulsory, it is recommended to call log functions with following signatures:

  • log.trace, log.debug, log.info, and log.warn: (msg: string, ...others: any[]).

  • log.error: (err: Error, ...others: any[]).

If you always want to monitor a specific event regardless of configured log level, use the plugin API:

const sentry = new LoglevelSentryPlugin(Sentry);

sentry.trace("this", "message", "will always be reported.");


  • This package requires a peer dependency of @babel/runtime
  • Node 12+