JavaScript agent placement
The JS agent is a client-side JavaScript snippet that collects browser attributes and sends these signals to FingerprintJS servers for processing and identification. Depending on your use case, placement of this script can range from all pages of your app to specific pages and events.
FingerprintJS Pro billing is based on API usage (device identifications), so it is important to make the most of your subscription’s monthly API limit. We recommend calling the API only when the visitorId will be processed, saved, etc by your application.
Using a JavaScript framework?
For JavaScript frameworks like React, Vue, and Angular, we recommend using our official framework-agnostic SPA wrapper. Learn more on GitHub.
The table below lists common use cases and recommended integration of the JavaScript agent.
Use Case | JS Agent Placement | API Call Event |
|---|---|---|
Anonymous Visitor Identification - bulk information collection of anonymous visitors | Landing page, checkout page, etc. | Page load |
Account Takeover Prevention - prevent account theft from malicious login attempts | Login page | "Login" button click |
Securing Login & Reducing Friction - reduce friction with conditional security checks at login | Login page | "Login" button click |
Account Sharing Prevention - prevent users from sharing accounts | Login page | "Login" button click |
Form & Survey Abuse - protect forms from duplicate entries | Form page | “Submit Form” button click |
Coupon & Promo Abuse - protect profits from duplicate promotion abuse | Checkout page | “Apply coupon” button click |
Credit Card Fraud - block users who repeatedly use faulty credit cards | Checkout page | “Checkout” button click |
E-commerce Tracking - track orders made by anonymous visitors | Checkout page | “Checkout” button click |
Paywall Circumvention - detect Incognito mode and prevent unlimited views of your paywalled content | Paywalled pages | Page load |
Device fingerprinting for native mobile apps
For mobile device identification, we highly recommend using our native SDKs for Android and iOS. For device identification that is scoped to the browser instance, a unique ID called
visitorIdis generated per browser. If a visitor switches to a different browser on the same device, a newvisitorIdis generated for that browser.
Updated 4 months ago