OTP UI/UX with html css and javascript

#webdev #javascript #programming #beginners
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Interactive OTP Input</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      background-color: #1e1e2e;
      margin: 0;
    }

    .container {
      text-align: center;
      background: #2a2a40;
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }

    h2 {
      color: #c792ea;
      margin-bottom: 20px;
    }

    .otp-input {
      display: flex;
      justify-content: center;
      gap: 10px;
    }

    .otp-input input {
      width: 50px;
      height: 50px;
      text-align: center;
      font-size: 1.5em;
      border: 2px solid #444;
      border-radius: 5px;
      outline: none;
      transition: all 0.3s ease;
      color: #fff;
      background: #1e1e2e;
    }

    .otp-input input:focus {
      border-color: #c792ea;
      box-shadow: 0 0 10px #c792ea;
    }

    .otp-input input.correct {
      border-color: #4caf50;
      box-shadow: 0 0 10px #4caf50;
    }

    .otp-input input.error {
      border-color: #ff4c4c;
      box-shadow: 0 0 10px #ff4c4c;
      animation: shake 0.3s ease-in-out;
    }

    @keyframes shake {
      0%, 100% { transform: translateX(0); }
      25% { transform: translateX(-5px); }
      50% { transform: translateX(5px); }
      75% { transform: translateX(-5px); }
    }

    .message {
      margin-top: 15px;
      font-size: 1em;
      color: #fff;
    }

    .message.success {
      color: #4caf50;
    }

    .message.error {
      color: #ff4c4c;
    }
  </style>
</head>
<body>
  <div class="container">
    <h2>Enter OTP</h2>
    <div class="otp-input">
      <input type="text" maxlength="1" id="digit1">
      <input type="text" maxlength="1" id="digit2">
      <input type="text" maxlength="1" id="digit3">
      <input type="text" maxlength="1" id="digit4">
    </div>
    <div class="message" id="message"></div>
  </div>

  <script>
    const inputs = document.querySelectorAll('.otp-input input');
    const message = document.getElementById('message');
    const correctOTP = '0007';

    inputs.forEach((input, index) => {
      input.addEventListener('input', () => {
        if (input.value.length === 1 && index < inputs.length - 1) {
          inputs[index + 1].focus();
        }
        validateOTP();
      });

      input.addEventListener('keydown', (e) => {
        if (e.key === 'Backspace' && index > 0 && !input.value) {
          inputs[index - 1].focus();
        }
      });
    });

    function validateOTP() {
      const otp = Array.from(inputs).map(input => input.value).join('');
      if (otp.length === 4) {
        if (otp === correctOTP) {
          inputs.forEach(input => input.classList.add('correct'));
          message.textContent = '✅ OTP Correct!';
          message.className = 'message success';
        } else {
          inputs.forEach(input => input.classList.add('error'));
          message.textContent = '❌ Invalid OTP!';
          message.className = 'message error';
          setTimeout(() => {
            inputs.forEach(input => input.classList.remove('error'));
            message.textContent = '';
          }, 1000);
        }
      }
    }
  </script>
</body>
</html>
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OTP UI/UX with html css and javascript

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