> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fingerprint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> The Fingerprint JavaScript agent is a high-performance JavaScript function that collects multiple device and browser signals and sends them to the Fingerprint Platform API for visitor identification and device intelligence analysis.

export const DeprecatedVersion = ({currentPath}) => <Warning>
    This version is deprecated. See the{" "}
    <a href="/reference/api-deprecation-policy">deprecation policy</a> and use
    the <a href={currentPath}>current version</a> instead.
  </Warning>;

<DeprecatedVersion currentPath="/reference/js-agent-v4" />

This section contains the complete API Reference for the JavaScript agent, specifically:

* [The load() function](/reference/v3/js-agent-load-function) options that are used to download and initialize the JavaScript agent.
* [The get() function](/reference/v3/js-agent-get-function) options for sending identification requests and its response schema.
* [Error handling reference](/reference/v3/js-agent-error-handling).

## JavaScript agent guides

If you are just getting started with Fingerprint, we recommend reading the following guides first:

* [Install the JavaScript agent](/docs/install-the-javascript-agent)
* [Identify visitors](/docs/identify-visitors)

## Framework-specific SDKs

If your web application is built using **React**, **Vue**, **Svelte**, or **Angular**, we recommend using a higher-level library wrapping the JavaScript agent made for your specific framework. See [Using a framework-specific SDK for more details](/docs/install-the-javascript-agent#using-a-framework-specific-sdk).

## Changelog

To keep track of changes and updates to the JavaScript agent, see the [JavaScript Agent Changelog](/changelog).

## Browser support

The JavaScript agent supports all currently popular browsers. For more details, see [Browser and device support](/docs/browser-and-device-support).

## TypeScript support

If you install the JavaScript agent using the [NPM loader package](/docs/install-the-javascript-agent#installing-the-agent-loader-using-npm) or one of our [client libraries](/docs/install-the-javascript-agent#using-a-framework-specific-sdk), it includes TypeScript types.

The agent officially supports TypeScript version **5.1** but may work with newer and older versions of TypeScript. Please see the [Error handling reference](/reference/v3/js-agent-error-handling) if you encounter any problems.

## Mobile device client agents

The JavaScript agent is used to identify and provide intelligence about **browsers**. For mobile identification and device intelligence, please see:

* [Identify Android devices](/docs/native-android-integration)
* [Identify iOS devices](/docs/ios)