FingerprintJS.load({
  token: 'your-pro-key',
  // note that you don't need to specify the region i
  // if you use the global endpoint
+ region: 'eu'
})

import FingerprintJS from '@fingerprintjs/fingerprintjs-pro'
 
const fpPromise = FingerprintJS.load({
  token: 'your-pro-key',
  // note that you don't need to specify the region 
  // if you use the global endpoint
  region: 'eu'
})

// When you need the visitor identifier:
fpPromise
  .then(fp => fp.get())
  .then(result => console.log(result.visitorId))

<script>
  function initFingerprintJS() {
    const fpPromise = FingerprintJS.load({
      token: 'your-pro-key',
      region: 'eu'
    })
  
    // When you need the visitor identifier:
    fpPromise
      .then(fp => fp.get())
      .then(result => console.log(result.visitorId))
  }
</script>
<script
  async
  src="https://cdn.jsdelivr.net/npm/@fingerprintjs/[email protected]/dist/fp.min.js"
  onload="initFingerprintJS()"
></script>