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Keep track of errors after deployment.
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A small library to keep track of errors after deployment.


Example of a situation:

After you released your fancy new website, some people will start to send you emails about a bug that you never experienced. Unfortunately, these persons aren't developers and have no idea of what the inspector is, so you can't ask them to take a screenshot of the error. And because of that, this error will always happen to some people, which is a big issue.

Catch was created to fix that. You can detect errors, and send a fetch request with the content of the error and additional information.



Open a terminal

npm i catch.js

Now in your NodeJS file

const d = require("catch.js")(err => {
	// Do something when there is an error


At the end of your <body> tag

<!-- Make sure this is the first script to be loaded -->
<script src=""></script>

In your JavaScript file

const d = new Catch(err => {
	// Do something when there is an error

Error Object

When there is an error, Catch will automatically run a function and it will pass it an object. Here are all its properties:


  • err: The error message (String)
  • time: When the error was thrown (String)


  • err: The error message (String)
  • src: The file that thrown the error
  • line: The line where the error was thrown
  • column: The column where the error was thrown
  • errObj: A native ErrorObject that contains all the information about the error.
  • time: When the error was thrown (String)
  • userAgent: Browser version and information

Additional notes

I recommend using html2canvas in addition to this library to get a screenshot of the website.

You can also access all the previous errors using the .errors property.


ProType is a project that required a lot of work and effort. You can show your appreciation by leaving a ⭐️. But you can also contribute in a 'financial' way by giving to my Patreon


Please read for details on our code of conduct, and the process for submitting pull requests to us.


We use SemVer for versioning. For the versions available, see the tags on this repository.


  • Arthur Guiot - Initial work - @arguiot

See also the list of contributors who participated in this project. If you don't code but you have great ideas, don't hesitate to write your idea in the issue part. If your idea is accepted, I will add you to this list 😊.

Thank You
for support


This project is licensed under the MIT License - see the LICENSE file for details.

Copyright © 2017 Arthur Guiot All Rights Reserved.

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