Identifier First Login

Sign-in 18

About

Identifier-first login form for React and Tailwind CSS (shadcn/ui) with email-based SSO routing, social sign-in, and remembered passkeys. One field finds the right sign-in method, with detection after you finish typing and one clear switch to the suggested action. Hints stay quiet while you type; detection waits 400ms after your last edit, or happens immediately on Enter or blur. The same provider button moves into the primary position when your email matches a route. Choosing a social or password action keeps the layout still, with brief in-button progress and disabled alternatives. Includes a last-used badge, expandable password fallback, biometric progress, controlled email and status, accessible method announcements, reduced-motion support, and a 7.2-second interactive demo showing SSO followed by a remembered passkey. Use it on SaaS, workspace, or web app login pages. Authentication remains in your app: connect onContinue(method, email) to your sign-in flow. Client routes are presentation hints; resolve routing and account availability on your server. Supply only locally remembered accounts, never an account directory.

Built with React and Tailwind. Copy the prompt and paste it into Claude Code, Cursor or Lovable: your agent adds Identifier First Login to your project and fits it to your theme.

Code

How Identifier First Login is used: the demo's code. The component's own source comes with a free account.

Usage.tsx

"use client";

import * as React from "react";
import { IdentifierFirstLogin } from "@/components/ui/identifier-first-login";
import type { IdentifierFirstLoginProps, LoginDemoStep, LoginMethod, LoginStatus } from "@/components/ui/identifier-first-login";

const DEMO_SEQUENCE: LoginDemoStep[] = [
  { at: 300, email: "[email protected]", typeFor: 1100 },
  { at: 3800, email: "[email protected]", typeFor: 400 },
  { at: 5200, status: "pending" },
  { at: 6200, status: "success" },
];
const DEMO_ROUTES: IdentifierFirstLoginProps["routes"] = [
  { domain: "acme.com", method: "sso", label: "Acme SSO" },
  { domain: "gmail.com", method: "google" },
  { domain: "outlook.com", method: "microsoft" },
  { domain: "icloud.com", method: "apple" },
];
const DEMO_ACCOUNTS: IdentifierFirstLoginProps["knownAccounts"] = [
  { email: "[email protected]", name: "Sam", avatar: "https://cdn.21st.dev/assets/mirror/08/083512c392e5be2f238b60666489cd2cb04e213d5ded7ae83a6f941896c2e993.jpg", method: "passkey" },
];
const METHOD_NAMES = { google: "Google", microsoft: "Microsoft", apple: "Apple", password: "Password", sso: "SSO", passkey: "Passkey" };

type DemoProps = { autoplay?: boolean; bare?: boolean; controlled?: boolean; initialEmail?: string; status?: LoginStatus; error?: string; showControls?: boolean };

export default function LoginDemo({ autoplay = true, bare = false, controlled = false, initialEmail = "", status = "idle", error, showControls = true }: DemoProps = {}) {
  const [email, setEmail] = React.useState(initialEmail);
  const [selection, setSelection] = React.useState(null as { method: LoginMethod; email: string } | null);
  const [demoKey, setDemoKey] = React.useState(0);
  const shared: IdentifierFirstLoginProps = {
    appName: "Acme",
    logo: <svg viewBox="0 0 24 24" fill="none" className="size-6" aria-hidden="true"><path d="m4 16 8-12 8 12M7 12h10M4 20h16" stroke="currentColor" strokeWidth="2.3" strokeLinecap="round" strokeLinejoin="round" /></svg>,
    routes: DEMO_ROUTES,
    knownAccounts: DEMO_ACCOUNTS,
    lastUsed: "google",
    defaultEmail: initialEmail,
    ...(controlled ? { email, onEmailChange: setEmail } : {}),
    status,
    error,
    demoSequence: DEMO_SEQUENCE,
    demoDuration: 7200,
    onContinue: (method, nextEmail) => setSelection({ method, email: nextEmail }),
    footer: <span>A little less friction. A little more flow.</span>,
  };

  return (
    <main data-login-demo className="flex min-h-screen w-full flex-col items-center justify-center gap-3 bg-muted/40 px-4 py-4">
      <p className="w-full max-w-[400px] px-1 text-center text-[11px] font-medium text-muted-foreground">One field. The right sign-in method.</p>
      {bare ? <IdentifierFirstLogin key={demoKey} {...shared} /> : <IdentifierFirstLogin key={demoKey} {...shared} autoplay={autoplay} />}
      {showControls && <div className="grid h-[15px] w-[280px] max-w-full grid-cols-[1fr_auto_auto] items-center gap-2 text-[10px] text-muted-foreground"><span data-login-caption className="text-left">{selection ? `Demo only · ${METHOD_NAMES[selection.method]} selected` : bare || !autoplay ? "Try your email" : "Interactive preview"}</span><span aria-hidden="true">·</span><button type="button" data-replay onClick={() => { setSelection(null); setEmail(initialEmail); setDemoKey(demoKey + 1); }} className="rounded px-1 underline decoration-border underline-offset-4 hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring">Replay</button></div>}
      {selection && <output data-callback className="sr-only">Demo selection: {selection.method} · {selection.email}</output>}
    </main>
  );
}