Detect React
React is an open-source JavaScript library for building user interfaces or UI components.
Detection looks at meta tags, script sources, javascript globals, dom selectors, html markup, inline scripts across 16 fingerprint rules among the site's public responses.
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Websites using React
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Signal classes
PluginView evaluates public page signals in these classes when identifying React. Individual fingerprint rule bodies are proprietary and are not published.
- Meta tags
- Script sources
- JavaScript globals
- DOM selectors
- HTML markup
- Inline scripts
03
Example public indicators for React
Illustrative indicators derived from public catalog metadata for React. A live scan may match additional proprietary rules beyond these examples.
- description: Web site created using create-react-app
- og:image: %REACT_APP_SEO_IMAGE_URL%
- react-with-addons?0.0*.js
- react.min?.js
- react\b.*.js
- React.version:
- ReactOnRails
- __REACT_ON_RAILS_EVENT_HANDLERS_RAN_ONCE__
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What a detection means
- Establishes
- One or more public signals on the scanned page matched a known React signature (16 rules) at the time of the scan.
- Does not establish
- A sitewide install of React, an active vendor contract, exclusive use, or that React is still in place today.
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How to check a site for React
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest React signals.
- 2. PluginView reads only public responses (meta tags, script sources, javascript globals) and scores them against the React signature set (16 rules).
- 3. Review the confidence score and text explanation for React on the results page.
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FAQ: detecting React
- Can PluginView detect React without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for React — typically meta tags, script sources, javascript globals, dom selectors. It does not bypass authentication or paywalls.
- What category is React?
- React is classified under JavaScript frameworks in the PluginView directory.
- How many fingerprint rules cover React?
- This reference currently tracks 16 fingerprint rules across meta tags, script sources, javascript globals, dom selectors, html markup, inline scripts. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses React?
- Illustrative public indicators for React include description: Web site created using create-react-app; og:image: %REACT_APP_SEO_IMAGE_URL%; react-with-addons?0.0*.js. A live scan may match additional proprietary rules beyond these examples.
