index.html

<!DOCTYPE html>
<html>

<head>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Form Validation</title>
  <link rel="stylesheet" href="style.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css"
    integrity="sha512-SnH5WK+bZxgPHs44uWIX+LLJAJ9/2PkPKZ5QiAj6Ta86w+fsb2TkcmfRyVX3pBnMFcV7oQPJkl9QevSCWr3W6A=="
    crossorigin="anonymous" referrerpolicy="no-referrer" />

</head>

<body>
  <div class="container">
    <form>
      <i class="fas fa-paper-plane"></i>
      <div class="input-group">
        <label>Full Name</label>
        <input type="text" placeholder="Enter your name" id="contact-name" onkeyup="validateName()">
        <span id="name-error"></span>
      </div>

      <div class="input-group">
        <label>Phone Number</label>
        <input type="tel" placeholder="123 456 7890" id="contact-phone" onkeyup="validatePhone()">
        <span id="phone-error"></span>

      </div>

      <div class="input-group">
        <label>Email Id</label>
        <input type="email" placeholder="Enter Email" id="contact-email" onkeyup="validateEmail()">
        <span id="email-error"></span>

      </div>

      <div class="input-group">
        <label>Your Message</label>
        <textarea rows="5" placeholder="Enter your message" id="contact-message" onkeyup="validateMessage()"></textarea>
        <span id="message-error"></span>

      </div>

      <button onclick="return validateForm()">Submit</button>
      <span id="submit-error"></span>

    </form>

  </div>
  <script src="script.js"></script>
</body>

</html>