Detect CatchJS
CatchJS is a JavaScript error-logging tool that captures runtime errors and generates detailed reports for diagnostic analysis.
Detection looks at script sources, javascript globals across 3 fingerprint rules among the site's public responses.
01
Websites using CatchJS
Loading website list…
02
Signal classes
PluginView evaluates public page signals in these classes when identifying CatchJS. Individual fingerprint rule bodies are proprietary and are not published.
- Script sources
- JavaScript globals
03
Example public indicators for CatchJS
Illustrative indicators derived from public catalog metadata for CatchJS. A live scan may match additional proprietary rules beyond these examples.
- cdn.catchjs.com
- catchjs.log
- catchjs_config.clicks
04
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known CatchJS signature (3 rules) at the time of the scan.
- Does not establish
- A sitewide install of CatchJS, an active vendor contract, exclusive use, or that CatchJS is still in place today.
05
How to check a site for CatchJS
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest CatchJS signals.
- 2. PluginView reads only public responses (script sources, javascript globals) and scores them against the CatchJS signature set (3 rules).
- 3. Review the confidence score and text explanation for CatchJS on the results page.
06
FAQ: detecting CatchJS
- Can PluginView detect CatchJS without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for CatchJS — typically script sources, javascript globals. It does not bypass authentication or paywalls.
- What category is CatchJS?
- CatchJS is classified under Analytics in the PluginView directory.
- How many fingerprint rules cover CatchJS?
- This reference currently tracks 3 fingerprint rules across script sources, javascript globals. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses CatchJS?
- Illustrative public indicators for CatchJS include cdn.catchjs.com; catchjs.log; catchjs_config.clicks. A live scan may match additional proprietary rules beyond these examples.
