touch-id-with-nativescript.js

var context = new LAContext();
try {
  if (context.canEvaluatePolicyError(LAPolicy.LAPolicyDeviceOwnerAuthenticationWithBiometrics)) {
    context.evaluatePolicyLocalizedReasonReply(LAPolicy.LAPolicyDeviceOwnerAuthenticationWithBiometrics,
    "Are you the device owner?",
    function (success, error) {
      if (error) {
        // error; problem verifying identity
        return;
      }
      
      if (success) {
        // success; you are the device owner
        return;
      }
      
      // failure; you are not the device owner
    });
  }
} catch (e) {
  // exception; your device cannot authenticate with Touch ID
}