npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2026 – Pkg Stats / Ryan Hefner

js-error-log

v0.4.8

Published

Sends log messages for logging with ajax `POST` request.

Readme

Info

Sends log messages for logging with ajax POST request.

All log messages are application/json data.

After initialisation Logger listens for:

  1. JS errors
  2. jQuery .ajaxError (only if jQuery is used)
  3. unhandled rejection in promises

Install

npm i js-error-log

How to use

  1. Add js-error-log.js on your page / bundle
  2. Call Logger.init('/url/to/send/your/log-messages')
  3. That's all :)

Logger API

  1. .init(logPostURL, logDefaults) - initialised event listeners
    1. logPostURL - logging POST requests endpoint url, required
    2. logDefaults - object, that contains additional logging data, if needed (check initialisation demo in demo/index.html for details)
  2. .sendMessage(message) - sends POST request with given message
  3. isInit() - returns logger initialisation state

Log messages examples

js error (standard error. See onerror handler functions for other possible outputs)

[http://localhost:63342/js-error-log/demo/index.html?_ijt=801749sfdfouqaf0man5aklvu6]
[Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36]
[765x1012]
error:
Uncaught Error: Unhandled js error at http://localhost:63342/js-error-log/demo/index.html?_ijt=801749sfdfouqaf0man5aklvu6:14:11
 Stack: Error: Unhandled js error
    at http://localhost:63342/js-error-log/demo/index.html?_ijt=801749sfdfouqaf0man5aklvu6:14:11

jQuery .ajaxError

[http://localhost:63342/js-error-log/demo/index.html?_ijt=801749sfdfouqaf0man5aklvu6]
[Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36]
[765x1012]
error:  JQUERY-ajaxError
url: /test
method: GET
status: 404
statusText: Not Found
response: <!doctype html><title>404 Not Found</title><h1 style="text-align: center">404 Not Found</h1><hr/><p style="text-align: center">WebStorm 2017.2</p>

unhandled rejection in promises

[http://localhost:63342/js-error-log/demo/index.html?_ijt=801749sfdfouqaf0man5aklvu6]
[Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36]
[765x1012]
error:  Promise unhandled error
message: afsdfs is not defined
stack: ReferenceError: afsdfs is not defined
    at http://localhost:63342/js-error-log/demo/index.html?_ijt=801749sfdfouqaf0man5aklvu6:21:9
    at new Promise (<anonymous>)
    at http://localhost:63342/js-error-log/demo/index.html?_ijt=801749sfdfouqaf0man5aklvu6:20:5