# BiometricsService Example

Here’s a basic example of a Lightning web component that uses a device’s biometrics capabilities to verify device ownership.

The component’s HTML template is minimal, with a “Verify” button to initiate the biometrics check.

```html
<template>
  <lightning-card title="Biometrics Service Demo" icon-name="custom:privately_shared">
    <div class="slds-var-m-around_medium">
      Use device biometrics capabilities to verify current user is indeed device owner:
      <lightning-button
        variant="brand"
        label="Verify"
        title="Verify device ownership using biometrics"
        onclick="{handleVerifyClick}"
        class="slds-var-m-left_x-small"
      >
      </lightning-button>
    </div>
    <div class="slds-var-m-around_medium">
      <lightning-formatted-text value="{status}"></lightning-formatted-text>
    </div>
  </lightning-card>
</template>
```

This example simply uses BiometricsService to prompt the user to complete a biometrics check. A status message is returned, indicating whether the check was successful or not.

```javascript
import { LightningElement } from "lwc";
import { getBiometricsService } from "lightning/mobileCapabilities";

export default class NimbusPluginBiometricsService extends LightningElement {
  status;
  biometricsService;

  connectedCallback() {
    this.biometricsService = getBiometricsService();
  }

  handleVerifyClick() {
    if (this.biometricsService.isAvailable()) {
      const options = {
        permissionRequestBody: "Required to confirm device ownership.",
        additionalSupportedPolicies: ["PIN_CODE"],
      };
      this.biometricsService
        .checkUserIsDeviceOwner(options)
        .then((result) => {
          // Do something with the result
          if (result === true) {
            this.status = "✔ Current user is device owner.";
          } else {
            this.status = "𐄂 Current user is NOT device owner.";
          }
        })
        .catch((error) => {
          // Handle errors
          this.status = "Error code: " + error.code + "\nError message: " + error.message;
        });
    } else {
      // service not available
      this.status = "Problem initiating Biometrics service. Are you using a mobile device?";
    }
  }
}
```

**See Also**

- [Use the BiometricsService API](/docs/platform/mobile-offline/guide/use-biometricsservice-in-a-lightning-component.md)