Angular Quickstart

Overview

In this quickstart, you’ll add Fingerprint to a new Angular v21 project and identify the user’s device. The example use case in this quickstart is stopping new account fraud, where attackers create multiple fake accounts to abuse promotions, exploit systems, or evade bans. However, the steps you’ll follow apply to most use cases. By identifying the device behind each sign-up attempt, login, or transaction, you can flag and block suspicious users early. This guide focuses on the frontend integration. You’ll install the Fingerprint Angular SDK and initialize the JavaScript agent to generate an event ID to send to your backend for analysis. To see how to implement fraud prevention with this ID, continue to one of the backend quickstarts after completing this quickstart.

Estimated time: < 10 minutes

Prerequisites

Before you begin, make sure you have the following:

Node.js (v20 or later) and npm installed
Your favorite code editor
Basic knowledge of Angular and JavaScript/TypeScript

This quickstart only covers the frontend setup. You’ll need a backend server to receive and process the device identification event to enable fraud detection. Check out one of the backend quickstarts after completing this quickstart.

1. Create a Fingerprint account and get your API key

Sign up for a free Fingerprint trial if you don’t already have an account.
After signing in, go to the API keys page in the dashboard.
Copy your public API key; you’ll need it to initialize the JavaScript agent.

2. Set up your project

To get started, create a new Angular project. If you already have a project you want to use, you can skip to the next section.

Install the Angular CLI:

Terminal

npm install -g @angular/cli

Create a new project:

Terminal

ng new fingerprint-angular-quickstart

You will be presented with some configuration options for your project. Use the arrow and enter keys to navigate and select which options you desire. If you don’t have any preferences, just hit the enter key to take the default options and continue with the setup. After you select the configuration options and the CLI runs through the setup, you should see the following message:

Terminal

✔ Packages installed successfully.
 Successfully initialized git.

Change into the project folder:

Terminal

cd fingerprint-angular-quickstart

Open the fingerprint-angular-quickstart folder in your code editor and you’re ready to go! To run your project, run:

Terminal

npm start

In your browser, go to http://localhost:4200, and you should see the Angular welcome page. The application will automatically reload whenever you modify any of the source files.

3. Set up your account creation form

Before hooking up Fingerprint, create a new component at src/app/create-account-form/create-account-form.component.ts with the following:

src/app/create-account-form/create-account-form.component.ts

import { Component } from "@angular/core";
import { FormsModule } from "@angular/forms";

@Component({
  selector: "app-create-account-form",
  imports: [FormsModule],
  template: `<div class="wrapper">
    <h1>Create an account</h1>

    <div class="input-group">
      <label for="username">Username</label>
      <input id="username" type="text" placeholder="Username" [(ngModel)]="username" required />
    </div>
    <div class="input-group">
      <label for="password">Password</label>
      <input id="password" type="password" placeholder="Password" [(ngModel)]="password" required />
    </div>
    <button [disabled]="isLoading()" type="submit" (click)="handleSubmit()">
      {{ isLoading() ? "Loading..." : "Create Account" }}
    </button>
  </div>`,
  styles: `
    .wrapper {
      display: flex;
      align-items: center;
      flex-direction: column;
      margin-top: 200px;
    }

    .input-group {
      margin-bottom: 1.5rem;
      display: flex;
      flex-direction: column;
    }

    label {
      font-weight: 600;
      margin-bottom: 0.5rem;
      color: #333;
    }

    input[type="text"],
    input[type="password"] {
      padding: 0.75rem 1rem;
      border: 1px solid #ccc;
      border-radius: 6px;
      font-size: 1rem;
      transition: border-color 0.2s ease;
    }

    input:focus {
      border-color: #007bff;
      outline: none;
    }

    button[type="submit"] {
      width: 200px;
      padding: 0.75rem;
      font-size: 1rem;
      font-weight: 600;
      background-color: #e36132;
      color: white;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      transition: background-color 0.2s ease;
    }

    button[type="submit"]:hover:not(:disabled) {
      background-color: #e3531f;
    }

    button[type="submit"]:disabled {
      opacity: 0.4;
      cursor: not-allowed;
    }
  `,
})
export class CreateAccountFormComponent {
  isLoading = signal(false);

  username = "";
  password = "";

  // We will populate this in a later step.
  async handleSubmit() {}
}

Import and add the component to your App in src/app/app.ts:

src/app/app.ts

// ... other imports here
import { CreateAccountFormComponent } from "./create-account-form/create-account-form.component";

@Component({
  selector: "app-root",
  imports: [CreateAccountFormComponent],
  template: `<main class="main">
    <app-create-account-form />
  </main>`,
})
export class App {}

4. Install and initialize the JavaScript agent

To integrate Fingerprint into your Angular app, first add the Fingerprint Angular SDK via npm:

Terminal

npm install @fingerprint/angular

Open src/app/app.config.ts and add provideFingerprint to the providers array:

src/app/app.config.ts

// ... other imports here
import { provideFingerprint } from "@fingerprint/angular";

export const appConfig: ApplicationConfig = {
  providers: [
    // ...other config options
    provideFingerprint({
      startOptions: {
        apiKey: "PUBLIC_API_KEY",
        region: "us",
        // Ensure this matches your workspace region
        // For more information, see https://docs.fingerprint.com/docs/regions
      },
    }),
  ],
};

Replace PUBLIC_API_KEY with your actual public API key from the Fingerprint dashboard.

Note: For production, consider using environment variables to configure the API key.

5. Trigger visitor identification

Now that the JavaScript agent is initialized, you can identify the visitor only when needed. In this case, that’s when the user taps/clicks the Create Account button. When making the visitor identification request, you will receive the visitor_id as well as an event_id. Instead of using the visitor_id returned directly on the frontend (which could be tampered with), you’ll send the event_id to your backend. This ID is unique to each identification event. Your server can then use the Fingerprint Events API to retrieve complete identification data, including the trusted visitor ID and other actionable insights like whether they are using a VPN or are a bot.

Import FingerprintService in create-account-form.component.ts and configure it by passing it into the CreateAccountFormComponent class constructor. This automatically initializes it via Dependency Injection:

src/app/create-account-form/create-account-form.component.ts

import { FingerprintService } from "@fingerprint/angular";

// ... rest of component here
export class CreateAccountFormComponent {
  // ... other properties here

  constructor(private fingerprintService: FingerprintService) {}
}

Now populate the handleSubmit method to trigger identification when the user clicks Create Account:

src/app/create-account-form/create-account-form.component.ts

 async handleSubmit() {
    this.isLoading.set(true);

    try {
      const data = await this.fingerprintService.getVisitorData();

      console.log(`
        Visitor ID: ${data.visitor_id}
        Event ID: ${data.event_id}`);

      // Send the event_id to your server
      // await fetch("/api/create-account", {
      //   method: "POST",
      //   headers: { "Content-Type": "application/json" },
      //   body: JSON.stringify({
      //     username: this.username,
      //     password: this.password,
      //     eventId: data.event_id,
      //   }),
      // });

    } catch (err) {
      console.error('Registration failed', err);
    } finally {
      this.isLoading.set(false);
    }
  }

In this function:

this.isLoading.set(true) is used to monitor the process stage for the function call.
const data = await this.fingerprintService.getVisitorData(); - This triggers Fingerprint’s device identification and returns a data object containing the visitor’s visitor_id and event_id, which you can then send to your backend along with the username and password.

6. Test the app

If your dev server isn’t already running, start it with:

Terminal

npm start

In your browser, go to http://localhost:4200 (Angular’s default).
If you have any ad blockers, turn them off for localhost. View the documentation to learn how to protect your Fingerprint implementation from ad blockers in production.
Enter a username and password, then click Create Account.
Open the developer console in your browser, and you should see the visitor ID and event ID in the output:

Output

Visitor ID: kLmvO1y70BHKyTgoNoPq
Event ID: 9171022083823.zox1GS

Next steps

To use the identification data for fraud detection (like blocking repeat fake account creation attempts), you’ll need to send the event_id to your backend. From there, your server can call the Fingerprint Events API to retrieve the full visitor information data and use it to make decisions and prevent fraud. Check out these related resources:

Getting started

Web

Mobile

Server

Use Case Tutorials

Overview

Prerequisites

1. Create a Fingerprint account and get your API key

2. Set up your project

3. Set up your account creation form

4. Install and initialize the JavaScript agent

5. Trigger visitor identification

6. Test the app

Next steps

​Overview

​Prerequisites

​1. Create a Fingerprint account and get your API key

​2. Set up your project

​3. Set up your account creation form

​4. Install and initialize the JavaScript agent

​5. Trigger visitor identification

​6. Test the app

​Next steps

Overview

Prerequisites

1. Create a Fingerprint account and get your API key

2. Set up your project

3. Set up your account creation form

4. Install and initialize the JavaScript agent

5. Trigger visitor identification

6. Test the app

Next steps