Detect Polyfill
Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.
01
Websites using Polyfill
26 hostnames in the PluginView corpus for this technology.
| Hostname | Last seen |
|---|---|
| theguardian.com | 8/6/2026 |
| ijf.org | 8/3/2026 |
| thehindu.com | 8/3/2026 |
| thehindubusinessline.com | 8/3/2026 |
| patch.com | 8/3/2026 |
02
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known Polyfill signature at the time of the scan.
- Does not establish
- A sitewide install of Polyfill, an active vendor contract, exclusive use, or that Polyfill is still in place today.
03
How to check a site for Polyfill
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Polyfill signals.
- 2. PluginView reads only public responses and scores them against proprietary Polyfill fingerprints. Rule bodies and identifiers are not published.
- 3. Review the confidence score and text explanation for Polyfill on the results page.
04
FAQ: detecting Polyfill
- Can PluginView detect Polyfill without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for Polyfill. It does not bypass authentication or paywalls.
- What category is Polyfill?
- Polyfill is classified under JavaScript libraries in the PluginView directory.
- Does PluginView publish Polyfill fingerprint rules?
- No. Detection uses proprietary fingerprint rules that are not published. Scan results explain matches in plain language without disclosing rule bodies or identifiers.
