JS bic code validation

by justamir

HTML

<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
<div class="validation-page">
  <div class="form">
    <form class="login-form" method="post">
      <div>
        <label class="default__hidden" for="bic">BIC:</label>
        <input id="bic" type="text" name="bic" placeholder="bic number" data-mask>
        <span class="validation-message"></span>
      </div>
      <button id="submit" type="submit">Validate & Save</button>
      <p class="message">Having questions? <a href="#">Contact us now</a></p>
    </form>
  </div>
</div>

CSS

@import url(https://fonts.googleapis.com/css?family=Roboto:300);

body {
  background: #76b852; /* fallback for old browsers */
  background: -webkit-linear-gradient(right, #76b852, #8DC26F);
  background: -moz-linear-gradient(right, #76b852, #8DC26F);
  background: -o-linear-gradient(right, #76b852, #8DC26F);
  background: linear-gradient(to left, #76b852, #8DC26F);
  font-family: "Roboto", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;      
}

.validation-page {
  width: 360px;
  padding: 8% 0 0;
  margin: auto;
}

.form {
  position: relative;
  z-index: 1;
  background: #FFFFFF;
  max-width: 360px;
  margin: 0 auto 100px;
  padding: 45px;
  text-align: center;
  box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.2), 0 5px 5px 0 rgba(0, 0, 0, 0.24);
}

.form input {
  font-family: "Roboto", sans-serif;
  outline: 0;
  background: #f2f2f2;
  width: 100%;
  border: 0;
  margin: 0 0 15px;
  padding: 15px;
  box-sizing: border-box;
  font-size: 14px;
}

.form button {
  font-family: "Roboto", sans-serif;
  text-transform: uppercase;
  outline: 0;
  background: #4CAF50;
  width: 100%;
  border: 0;
  padding: 15px;
  color: #FFFFFF;
  font-size: 14px;
  -webkit-transition: all 0.3 ease;
  transition: all 0.3 ease;
  cursor: pointer;
}

.form button:hover,
.form button:active,
.form button:focus {
  background: #43A047;
}

.form .message {
  margin: 15px 0 0;
  color: #b3b3b3;
  font-size: 12px;
}

.form .message a {
  color: #4CAF50;
  text-decoration: none;
}

.form .register-form {
  display: none;
}

.default__hidden {display:none;}

JavaScript

$input = $('form').find('input[name="bic"]');
  
// function for correct BIC validation
function validateBic(bic) {
	
  // create BIC notation
  var pattern = /^(?:[a-zA-Z]{6}[a-zA-Z0-9]{2}([a-zA-Z0-9]{3})?)?$/;
  
  // test if input matches BIC notation
  var valid = pattern.test(bic);

  // if BIC notation not valid return false
	if (valid) {
  
  	return true;
    
  }
  
  return false;
  
}

// function for 
function maskFields() {

	// find the input with the data-mask attribute
	var $maskInput = $input.data('mask', '');

  // capitalize the value and remove any white space from input value
  $maskInput.val(function(i, val) {

    return val.toUpperCase().replace(/\s/g,'');

  });

}

// main init function
function initBicValidation() {

	// when the submit button is clicked
  $('#submit').on('click', function submitButtonClicked(event) {

		// cache the BIC input value
    var $bicValue = $input.val();
    
    // cache the error message container
    var $errorMessages = $('form').find('.validation-message');
    
    // if input type is invalid or is empty
    if (!validateBic($bicValue) || !$bicValue) { 

      $errorMessages.html('Unfortunately, this is not a valid BIC number.').prev().addClass('error');
      event.preventDefault();
      
    } else {
      
      maskFields();
      $errorMessages.html('').prev().removeClass('error').addClass('valid');
      event.preventDefault();
      
    }
    
  });
  
}

initBicValidation();