Detect ClientJS
ClientJS is a JavaScript library for generating browser fingerprints, exposing all the browser data-points.
Detection looks at script sources, javascript globals across 3 fingerprint rules among the site's public responses.
01
Websites using ClientJS
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02
Signal classes
PluginView evaluates public page signals in these classes when identifying ClientJS. Individual fingerprint rule bodies are proprietary and are not published.
- Script sources
- JavaScript globals
03
Example public indicators for ClientJS
Illustrative indicators derived from public catalog metadata for ClientJS. A live scan may match additional proprietary rules beyond these examples.
- clientjs@0.*?/
- ClientJS/0.*?/?
- ClientJS
04
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known ClientJS signature (3 rules) at the time of the scan.
- Does not establish
- A sitewide install of ClientJS, an active vendor contract, exclusive use, or that ClientJS is still in place today.
05
How to check a site for ClientJS
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest ClientJS signals.
- 2. PluginView reads only public responses (script sources, javascript globals) and scores them against the ClientJS signature set (3 rules).
- 3. Review the confidence score and text explanation for ClientJS on the results page.
06
FAQ: detecting ClientJS
- Can PluginView detect ClientJS without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for ClientJS — typically script sources, javascript globals. It does not bypass authentication or paywalls.
- What category is ClientJS?
- ClientJS is classified under JavaScript libraries, Browser fingerprinting in the PluginView directory.
- How many fingerprint rules cover ClientJS?
- 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 ClientJS?
- Illustrative public indicators for ClientJS include clientjs@0.*?/; ClientJS/0.*?/?; ClientJS. A live scan may match additional proprietary rules beyond these examples.
