Best practices

Recommendations and usage patterns that help the performance of your web applications.

API pre-connect
API pre-connect is recommended for improved request timings. To enable it, place the preconnect directive as early as possible in your head tag:
<html>
<head>
  <link rel="preconnect" href="https://cdn.fpjs.io">
  <link rel="preconnect" href="https://api.fpjs.io">
  ... styles, js etc
Note that you always need to pre-connect to api.fpjs.io. If you're using the CDN version of the script, you also need to pre-connect to cdn.fpjs.io.

If you're using the EU API, use this pre-connect URL: https://eu.api.fpjs.io
Cookie domain
This configuration option should only be used if you're running Fingerprint.js PRO on multiple subdomains and want the identification process to span both of them.
When you're using Fingerprint.js pro on multiple subdomains, you need to configure the cookieDomain .
Example: 
import { FP } from "@fp-pro/client"
​
let fp = await FP.load({
  region: "us", 
  client: "token", 
  cookieDomain: "example.com"})
For instance, you're running the PRO version on foo.example.com and bar.example.com. In order for the identification cookie to work on both subdomains, configure the cookieDomain to be example.com.
This will set the cookie for .example.com top-level domain and all subdomains. 

Regions

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Cloudflare

Last updated 1 month ago