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