# Detect JavaScript frameworks used by a list of websites

**Use case:** 

Enter a list of websites and see which JavaScript frameworks, libraries and UI frameworks each one uses, such as React, Next.js, Vue, Svelte, jQuery or Bootstrap, with the version when it is visible. Detection works from the HTML, script file names and headers the server sends; the Actor does not run JavaScript, so frameworks that load only in the browser may be missed. Up to 5,000 sites per run.

## Input

```json
{
  "urls": [
    "react.dev",
    "vuejs.org",
    "svelte.dev",
    "getbootstrap.com",
    "jquery.com"
  ],
  "categories": [
    "JavaScript frameworks",
    "JavaScript libraries",
    "UI frameworks"
  ],
  "includeEvidence": true,
  "includeVersions": true,
  "followRedirects": true,
  "timeoutSecs": 20,
  "maxConcurrency": 10
}
```

## Output

```json
{
  "domain": {
    "label": "Domain",
    "format": "string"
  },
  "technologies": {
    "label": "Technology",
    "format": "array"
  }
}
```

## About this Actor

This example demonstrates how to use [Website Technology Detector – CMS, Analytics, Hosting](https://apify.com/tinlark/website-technology-detector.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/tinlark/website-technology-detector.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

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

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/tinlark/website-technology-detector.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).