> For the complete documentation index, see [llms.txt](https://bugrecon.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bugrecon.gitbook.io/docs/features-list/scopes-overview/javascript-scan.md).

# JavaScript scan

The **JavaScript scan** analyzes **JavaScript files** served by your subdomains to find **hidden secrets** (API keys, tokens, credentials) and **API endpoints** (URLs, paths) that might not be visible in the HTML. It helps you expand attack surface and find sensitive data in front-end code.

## What it does

* For each selected subdomain, discovers and fetches JS files (from the main page and linked resources).
* Analyzes content for patterns: secrets, API keys, endpoints, URLs, and similar.
* Results are stored per subdomain: lists of secrets and endpoints with location (file, line or snippet). Shown in the scan detail with filters.

## Options

* **Subdomain selection:** Choose which subdomains to scan (or all).

## Availability

* **Basic**, **Premium** and **Enterprise** only. **Free** users do not have access to the JavaScript scan type.
* Uses your **scan quota** when you run it.


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