Fingerprint is a device intelligence platform offering industry-leading accuracy.

Fingerprint Vue SDK is an easy way to integrate Fingerprint into your Vue 3 application. It supports all capabilities of the Fingerprint JavaScript agent.

• For Typescript users: Typescript 4.5 or higher
• Vue 3.1 or higher
• For Nuxt users: Nuxt 3.0 or higher

This package works with the commercial Fingerprint platform. It is not compatible with the source-available FingerprintJS library. Learn more about the differences between Fingerprint and FingerprintJS.

To install the plugin run:

yarn add @fingerprint/vue

Or:

npm install @fingerprint/vue

pnpm add @fingerprint/vue

To identify visitors, you'll need a Fingerprint account (you can sign up for free). Get your API key and get started with the Fingerprint documentation.

Register the plugin in your Vue application.

• Set a region if you have chosen a non-global region during registration.
• Set endpoints if you are using one of our proxy integrations to increase the accuracy and effectiveness of visitor identification.

import { createApp } from 'vue';
import App from './App.vue';
import { FingerprintPlugin } from '@fingerprint/vue';

const app = createApp(App);

app
  .use(FingerprintPlugin, {
    apiKey: '<your-public-api-key>',
    endpoints: "https://metrics.yourwebsite.com",
    region: 'eu',
  })
  .mount('#app');

You can use the plugin with Composition API, Options API, or Mixins, with or without Nuxt. See the usage examples below.

The plugin provides a useVisitorData composable you can use to identify visitors:

<script setup>
import { useVisitorData } from '@fingerprint/vue';
import { watch } from 'vue';

const { data, error, isLoading, isFetched, getData } = useVisitorData(
  // Set to false to prevent fetching data on mount
  { immediate: false }
);

watch(data, (currentData) => {
  if (currentData) {
    // Do something with the data
    console.log(currentData.visitor_id);
  }
});
</script>

<template>
  <button @click='getData()'>Get visitor data</button>
</template>

The getData() function throws on error. You can catch errors using try/catch or check the error ref:

<script setup>
import { useVisitorData } from '@fingerprint/vue';

const { data, error, isLoading, isFetched, getData } = useVisitorData();

async function handleClick() {
  try {
    const result = await getData();
    console.log(result.visitor_id);
  } catch (err) {
    console.error('Identification failed:', err);
  }
}
</script>

The plugin injects a $fingerprint object into your components that you can use to identify visitors:

<script lang='ts'>
import { defineComponent } from 'vue';

export default defineComponent({
  methods: {
    async getVisitorData() {
      const result = await this.$fingerprint.getVisitorData();
      // Do something with result
      console.log(result.visitor_id);
    }
  }
});
</script>

<template>
  <button @click='getVisitorData'>Get visitor data</button>
</template>

For convenience, we also provide a mixin that handles all query states:

<script lang='ts'>
import { defineComponent } from 'vue';
import { fingerprintGetVisitorDataMixin } from '@fingerprint/vue';

export default defineComponent({
  mixins: [fingerprintGetVisitorDataMixin],
  async mounted() {
    // You can also fetch data on mount
    // await this.$getVisitorData();
  }
});
</script>

<template>
  <div>
    <button @click='$getVisitorData'>
      Get visitor data
    </button>
    <span v-if='visitorData.isLoading'>
      Loading...
    </span>
    <span v-else-if='visitorData.error'>
      Error: {{ visitorData.error }}
    </span>
    <span v-else-if='visitorData.isFetched'>
      Visitor ID: {{ visitorData.data.visitor_id }}
    </span>
  </div>
</template>

The plugin works with Nuxt out of the box, however, you need to register it on the client side only.

// plugins/fingerprint.client.ts
import { defineNuxtPlugin, useRuntimeConfig } from '#app';
import { FingerprintPlugin } from '@fingerprint/vue';

export default defineNuxtPlugin((nuxtApp) => {
  const config = useRuntimeConfig();

  nuxtApp.vueApp.use(FingerprintPlugin, {
    apiKey: config.public.API_KEY,
    endpoints: "https://metrics.yourwebsite.com",
    region: 'eu',
  });
});

// nuxt.config.ts
import { defineNuxtConfig } from 'nuxt';

export default defineNuxtConfig({
  runtimeConfig: {
    public: {
      // Inject Fingerprint API key
      API_KEY: process.env.API_KEY,
    },
  }
});

See the example Nuxt Application for more details.

The visitor_id provided by Fingerprint Identification is especially useful when combined with information you already know about your users, for example, account IDs, order IDs, etc. To learn more about various applications of the linkedId and tag, see Linking and tagging information.

Associate your data with a visitor ID using the linkedId or tag parameter of the useVisitorData() composable or the getData() function:

<script setup>
import { useVisitorData } from '@fingerprint/vue';

const { data, error, isLoading, getData } = useVisitorData({
  linkedId: 'user_1234',
  tag: {
    userAction: 'login',
    analyticsId: 'UA-5555-1111-1',
  },
})
</script>

<template>
<!--...-->
</template>

For advanced use cases, you can access the full @fingerprint/agent API using the Fingerprint namespace export:

import { Fingerprint } from '@fingerprint/vue';

// Use agent types
type Result = Fingerprint.GetResult;
type Options = Fingerprint.GetOptions;

// Or call start() directly
const agent = Fingerprint.start({ apiKey: '...' });
const result = await agent.get();

Fingerprint usage is billed per API call. To avoid unnecessary API calls, it is a good practice to cache identification results.

Caching is off by default. You can configure caching using plugin options:

app.use(FingerprintPlugin, {
  apiKey: '<your-public-api-key>',
  cache: {
    storage: 'sessionStorage', // or 'localStorage' or 'agent'
    duration: 'optimize-cost', // or 'aggressive' or a number in seconds
  },
});

Version 2.0 upgrades the underlying Fingerprint agent from v3 to v4 and introduces several breaking changes. See the migration guide for detailed instructions and the JavaScript agent v3 to v4 migration guide for underlying agent changes.

You can find detailed documentation in the API reference.

To ask questions or provide feedback, use Issues. If you need private support, please email us at [email protected]. If you'd like to have a similar Vue wrapper for the source-available FingerprintJS, consider creating an issue in the main FingerprintJS repository.

You can find the following examples in the examples directory:

• SPA Application
• Nuxt Application

This project is licensed under the MIT license.