# Inspect framework signals across websites

**Use case:** 

Detect exposed React, Next.js, Vue and other JavaScript technology signals from supplied websites. Export framework and library columns for technical research. Does not execute page JavaScript or prove framework absence.

## Input

```json
{
  "startUrls": [
    "https://nextjs.org",
    "https://nuxt.com",
    "https://www.gatsbyjs.com"
  ],
  "filterTechnologies": [
    "React",
    "Next.js",
    "Vue.js",
    "Nuxt.js",
    "Angular",
    "AngularJS",
    "Svelte",
    "SvelteKit",
    "Astro",
    "Gatsby",
    "Remix",
    "Ember.js",
    "Backbone.js",
    "Alpine.js",
    "SolidJS",
    "Qwik",
    "Preact",
    "Lit",
    "Stimulus",
    "htmx",
    "jQuery",
    "Vite",
    "webpack",
    "Emotion",
    "styled-components",
    "Tailwind CSS",
    "Bootstrap",
    "Material UI"
  ],
  "onlyMatching": false,
  "maxConcurrency": 20,
  "timeoutSecs": 45,
  "proxyConfiguration": {
    "useApifyProxy": false
  }
}
```

## Output

```json
{
  "url": {
    "label": "Website",
    "format": "link"
  },
  "javascriptFrameworks": {
    "label": "JS frameworks",
    "format": "text"
  },
  "javascriptLibraries": {
    "label": "javascriptLibraries",
    "format": "text"
  },
  "uiFrameworks": {
    "label": "uiFrameworks",
    "format": "text"
  },
  "webFrameworks": {
    "label": "webFrameworks",
    "format": "text"
  },
  "error": {
    "label": "Error",
    "format": "text"
  }
}
```

## About this Actor

This example demonstrates how to use [JavaScript Framework Detector | React & Vue](https://apify.com/keystonelabs/javascript-framework-detector.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/keystonelabs/javascript-framework-detector.md) to learn more, explore other use cases, and run it yourself.


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This Task's input is already configured above — use it as-is rather than inventing a new one.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
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For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/keystonelabs/javascript-framework-detector.md

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).