HTML 5 Validation

<!DOCTYPE html>
<html>
  <head></head>
  <body>
    
    <form id="exampleForm">
      <div>
        <label for="FirstName">First Name</label>
        <input type="text" name="FirstName" required />
      </div>  
      <input type="submit" value="Submit">
    </form>
    
  </body>
</html>

// Code goes here