Adding passkey autofill to your Keycloak login flow

<link rel="stylesheet" href="${url.resourcesPath}/css/styles.css">
<script src="${url.resourcesPath}/js/script.js"></script>
<div class="login-container">
  <div class="login-card">
    <div class="login-header">
      <p>Please enter your credentials to continue</p>
    </div>

    <form action="${url.loginAction}" method="post" class="login-form">
      <div class="form-group">
        <label for="username">Username</label>
        <input
          id="username" 
          name="username" 
          type="text" 
          autocomplete="username webauthn"
          placeholder="Enter your username"
        />
      </div>
      
      <div class="form-group">
        <label for="password">Password</label>
        <input 
          id="password" 
          name="password" 
          type="password"
          placeholder="Enter your password"
          autocomplete="current-password webauthn"
        />
      </div>

      <button type="submit">Sign In</button>
    </form>
  </div>
</div>

function setWebauthnAttribute() {
  var usernameInput = document.getElementById("username");
  var passwordInput = document.getElementById("password");

  const formElement = document.querySelector("form");

  if (usernameInput && passwordInput) {
    usernameInput.setAttribute("autocomplete", "username webauthn");

    // NOTE: Replace the following values with your Authsignal tenant ID and server URL
    var client = new window.authsignal.Authsignal({
      tenantId: "YOUR_TENANT_ID",
      baseUrl: "https://api.authsignal.com/v1",
    });

    client.passkey
      .signIn({ autofill: true })
      .then((response) => {
        if (response) {
          const hiddenTokenInput = document.createElement("input");
          hiddenTokenInput.type = "hidden";
          hiddenTokenInput.name = "token";
          hiddenTokenInput.value = response.token;
          formElement.appendChild(hiddenTokenInput);
          formElement.submit();
        }
      })
      .catch((error) => {
        console.log("error", error);
      });
  }
}

function loadAuthsignalSdk() {
  var script = document.createElement("script");
  script.onload = setWebauthnAttribute;
  script.src = "https://unpkg.com/@authsignal/browser@0.5.2/dist/index.min.js";
  document.head.appendChild(script);
}

document.addEventListener("DOMContentLoaded", loadAuthsignalSdk);