# font-fingerprint

[![jsdelivr](https://data.jsdelivr.com/v1/package/npm/font-fingerprint/badge)](https://www.jsdelivr.com/package/npm/font-fingerprint)
[![npm](https://img.shields.io/npm/v/font-fingerprint)](https://www.npmjs.com/package/font-fingerprint)

`font-fingerprint` is a library that generates a unique identifier for each visitor based on the installed fonts of the browser.

Almost fingerprint libraries are based on the various browser features. Even with the same device, different browser types can generate different identification values.

`font-fingerprint` is free from these constraints because
it only considers the types of installed fonts.

This library is inspired by [fingerprintjs](https://github.com/fingerprintjs/fingerprintjs).

## Install

```bash
npm install font-fingerprint
```

or

```html
<script src="https://cdn.jsdelivr.net/npm/font-fingerprint@1.0.0/dist/index.min.js"></script>
```

## Usage

```ts
import getFingerprint from "font-fingerprint";

const result = getFingerprint();
```

## Result

- `visitorId` is a unique identifier for each visitor. Hashed by `sha1`.
- `components` contains `font`, which is the available fonts in the browser.

```
{
  "visitorId": "77ce0377defbd11b77b1f4ad54ca40ea5ef28490",
  "components": {
    "font": [
      "Helvetica Neue",
      "Menlo",
      "Monaco",
      "Apple Symbols",
      "Arial Unicode MS",
      "Gill Sans",
      "Menlo"
    ]
  }
}
```