Atributul disabled

<form className="login-container">
  <label htmlFor="email">Introdu adresa de email:</label>
  <input type="email" id="email" placeholder="Email" />
  <label htmlFor="password">Introdu parola:</label>
  <input type="password" id="password" placeholder="Password" />
  <button type="submit" disabled>Loghează-te</button>
</form>