<!-- Add animations on Braintree Hosted Fields events -->

<!-- Card numbers
4111 1111 1111 1111: Visa
5555 5555 5555 4444: MasterCard
3714 496353 98431: American Express
-->

<!--[if IE 9]>
<style>

header {
  margin-top: 1em;
  text-align: center;
}

#my-sample-form {
  margin: 0 auto;
  padding-top: 2em;
}

.bg-illustration {
  z-index: -1;
}

#button-pay {
  margin: 1em auto 0;
  display: block;
}

.cardinfo-exp-date, .cardinfo-cvv {
  width: 45%;
  float: left;
}

.cardinfo-wrapper {
  overflow: hidden;
}

</style>
<![endif]-->

<div class="form-container">
  <div class="bg-illustration">
    <svg width="801" height="570" viewBox="0 0 801 570" xmlns="http://www.w3.org/2000/svg"><path d="M695.15 540.43c-20.954 6.55-43.243 8.226-64.932 4.89 26.065-11.507 55.1-15.426 83.328-12.16-6.065 2.907-12.257 5.35-18.397 7.27m-74.984-158.957c-21.38 10.4-43.668 18.945-66.534 25.507-10.876 3.124-21.884 5.796-32.982 8.01-9.54 1.897-19.777 4.24-29.407 1.474-3.74-1.074-7.995-3.277-9.628-7.045-1.683-3.892 5.25-9.335 7.905-12.03 7.204-7.305 15.39-13.605 24.186-18.898 17.312-10.42 36.777-16.946 56.58-20.74 29.96-5.74 61.745-5.98 91.927.11-13.534 8.686-27.587 16.578-42.047 23.61M500.756 239.7c-33.755 25.25-73.15 43.654-114.53 52.324-3.04.637-17.404 1.327-11.22-4.79 4.484-4.435 9.366-8.456 14.522-12.093 8.946-6.313 18.65-11.5 28.616-16.02 22.272-10.1 45.856-17.684 69.6-23.497 8.246-2.02 16.557-3.784 24.91-5.325-3.887 3.23-7.85 6.372-11.9 9.402M342.55 48.914c-6.185 9.275-13.586 17.906-21.198 26.05-29.246 31.28-66.41 55.228-107.156 68.748-9.036 2.998-18.98 6.006-28.552 3.737-3.216-.762-9.808-3.368-10.36-7.234-.303-2.117 2.287-5.23 3.342-6.96 1.356-2.23 2.805-4.4 4.337-6.514 12.736-17.588 30.818-30.666 49.696-41.077 34.208-18.862 71.874-31.495 110.664-37.96-.256.404-.51.81-.774 1.21m457.74 519.678c-22.864-19.48-51.17-31.804-80.733-36.312 9.67-5.095 18.695-11.365 26.732-18.812 14.05-13.024 24.878-30.252 26.41-49.644 1.64-20.754-7.21-41.398-19.804-57.542-20.985-26.902-53.498-42.06-86.39-49.197 2.876-1.887 5.738-3.798 8.565-5.757 17.06-11.824 34.41-25.288 44.125-44.053 8.667-16.737 10.507-38.63-.855-54.614-10.888-15.32-30.21-21.3-47.887-24.643-46.346-8.764-94.712-8.922-141.317-2.16-3.577.522-7.144 1.098-10.71 1.703 10.422-9.04 20.23-18.78 29.26-29.202 16.158-18.658 32.707-40.726 35.14-66.04 4.776-49.667-50.926-71.248-90.198-80.87-47.635-11.67-97.6-13.463-146.025-5.768 3.113-5.434 5.273-11.288 4.97-17.58-.47-9.854-7.347-18.123-15.74-22.784-11.377-6.32-25.098-5.845-37.625-4.418-23.028 2.626-45.735 8-67.582 15.672-43.49 15.276-83.362 39.604-118.428 69.25-36.16 30.574-67.404 66.832-93.41 106.278-6.348 9.625-12.37 19.457-18.1 29.46-.54.945.923 1.796 1.463.85 40.29-70.35 96.604-133.587 166.986-175.18C203.47 26.94 241.14 12.15 280.516 5.18c20.895-3.7 51.86-9.495 65.6 11.7 6.22 9.6 3.576 20.047-1.766 29.143-3.298.545-6.592 1.134-9.876 1.768-26.202 5.052-51.843 12.94-76.305 23.567-22.525 9.788-44.832 21.706-62.735 38.713-8.42 8-15.773 17.185-21.18 27.47-3.763 7.16 9.64 11.647 14.766 12.153 10.566 1.042 20.932-2.625 30.718-6.102 11.48-4.08 22.666-8.986 33.446-14.64 21.505-11.28 41.417-25.57 58.974-42.3 9.075-8.65 17.512-17.96 25.207-27.844 2.79-3.58 5.756-7.41 8.263-11.483 52.33-8.38 106.617-5.535 157.177 8.53 36.682 10.207 84.046 32.95 78.09 78.475-3.09 23.603-18.427 44.218-33.538 61.828-9.847 11.478-20.625 22.164-32.15 31.976-19.287 3.427-38.35 8.103-57.007 14.06-21.474 6.853-43.19 14.898-62.414 26.797-8.93 5.53-17.205 12.008-24.462 19.596-.195.202-.327.543-.22.82 3.423 8.837 16.933 4.033 23.404 2.455 11.922-2.908 23.653-6.584 35.105-10.975 22.774-8.73 44.46-20.26 64.415-34.24 7.58-5.31 14.908-10.972 21.96-16.955 39.06-6.903 79.05-8.58 118.555-4.88 21.537 2.018 45.684 4.04 65.153 14.28 9.745 5.127 18.006 12.924 21.967 23.337 3.86 10.146 3.67 21.456.824 31.83-6.102 22.25-24.29 38.393-42.392 51.46-5.212 3.767-10.53 7.39-15.925 10.896-1.224-.252-2.445-.517-3.667-.746-37.45-7.026-77.88-5.438-114.235 6.232-18.002 5.78-35.216 14.388-49.737 26.545-3.65 3.057-7.115 6.33-10.362 9.806-1.567 1.678-3.082 3.4-4.54 5.17-.875 1.064-2.49 2.35-2.57 3.775-.143 2.517 2.89 5.763 4.637 7.185 2.58 2.103 5.815 3.312 9.048 3.995 8.508 1.8 17.07.216 25.46-1.39 11.114-2.13 22.14-4.725 33.04-7.77 21.866-6.106 43.222-14.027 63.787-23.626 17.12-7.99 33.678-17.172 49.527-27.44 7.98 1.705 15.85 3.83 23.528 6.446 36.767 12.53 71.948 39.044 81.216 78.46 9.36 39.803-19.35 71.52-53.047 88.572-16.7-2.21-33.75-1.943-50.4.943-13.49 2.337-26.584 6.463-38.99 12.215-.637.294-.498 1.417.203 1.54 30.05 5.212 62.45.816 89.935-12.918 16.66 2.28 32.98 7.053 48.18 14.26 12.224 5.798 23.625 13.16 33.912 21.924.824.7 2.028-.486 1.197-1.193" fill="#FFF" fill-rule="evenodd"/></svg>

  </div>

  <header>
    <h1>Payment Method</h1>
  </header>

  <form id="my-sample-form" class="scale-down">
    <div class="cardinfo-card-number">
      <label class="cardinfo-label" for="card-number">Card Number</label>
      <div class='input-wrapper' id="card-number"></div>
      <div id="card-image"></div>
    </div>

    <div class="cardinfo-wrapper">
      <div class="cardinfo-exp-date">
        <label class="cardinfo-label" for="expiration-date">Valid Thru</label>
        <div class='input-wrapper' id="expiration-date"></div>
      </div>

      <div class="cardinfo-cvv">
        <label class="cardinfo-label" for="cvv">CVV</label>
        <div class='input-wrapper' id="cvv"></div>
      </div>
    </div>
  </form>

  <input id="button-pay" type="submit" value="Continue" />
</div>

<!-- Load the required client component. -->
<script src="https://js.braintreegateway.com/web/3.14.0/js/client.min.js"></script>

<!-- Load Hosted Fields component. -->
<script src="https://js.braintreegateway.com/web/3.14.0/js/hosted-fields.min.js"></script>
/*--------------------
Shared Variables
--------------------*/

$small-screen: 476px;
$grey: #111;
$blue: #5db6e8;
$darkBlue: #282c37;
$red: #E53A40;
$green: #8CD790;
$white: #fff;
$radius: 4px;
$bouncy: cubic-bezier(.20, 1.3, .7, 1);

/*--------------------
General
--------------------*/

// Position form at the center of the page
html,
body {
  font-size: 100%;
  height: 100%;
  color: $darkBlue;
  font-family: sans-serif;
  padding: 0;
  margin: 0;
}

header {
  z-index: 2;
  transform: translate(0, 5.5em);
  transition: all .5s ease;
  &.header-slide {
    transform: translate(0, 0);
  }
}

h1 {
  font-weight: 100;
  font-size: 1.4em;
  display: block;
}

.form-container {
  display: flex;
  background-color: #EEE;
  justify-content: center;
  align-items: center;
  height: 100%;
  flex-direction: column;
  border: 1em solid #fff;
  box-sizing: border-box;
  position: relative;
  
  @media (max-width: $small-screen) {
    border: none;
  }
}

.cardinfo-wrapper {
  display: flex;
  justify-content: space-around;
}

.bg-illustration {
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: 0;
  svg {
    width: 100%;
  }
}

.card-shape {
  border-radius: 6px;
  padding: 2em 2em 1em;
  
  @media (max-width: $small-screen) {
    padding: 2em 1.5em 1em;
  }
}

// Form wrapper styling 
#my-sample-form {
  background-color: #FFF;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.12);
  padding: 8em 3em 2em;
  width: 20em;
  margin-bottom: 2em;
  transition: all 600ms $bouncy;
  animation: cardIntro 500ms $bouncy;
  z-index: 1;
 
  &:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.06);
  }
  
  @media (max-width: $small-screen) {
    box-sizing: border-box;
    padding: 7em 2em 2em;
    width: 100%;
  }
  // Change background color based on the card type
  &.visa {
    @extend .card-shape;
    color: $white;
    background-color: #0D4AA2;
  }
  &.master-card {
    @extend .card-shape;
    color: $white;
    background-color: #363636;
    background: linear-gradient(115deg,#d82332, #d82332 50%, #f1ad3d 50%, #f1ad3d);
  }
  &.maestro {
    @extend .card-shape;
    color: $white;
    background-color: #363636;
    background: linear-gradient(115deg,#009ddd, #009ddd 50%, #ed1c2e 50%, #ed1c2e);
  }
  &.american-express {
    @extend .card-shape;
    color: $white;
    background-color: #007CC3;
  }
  &.discover {
    @extend .card-shape;
    color: $white;
    background-color: #ff6000;
    background: linear-gradient(#d14310, #f7961e);
  }
  &.unionpay, &.jcb, &.diners-club {
    @extend .card-shape;
    color: $white;
    background-color: #363636;
  }
}

.cardinfo-label {
  display: block;
  font-size: 11px;
  margin-bottom: 0.5em;
  text-transform: uppercase;
}

.cardinfo-exp-date {
  margin-right: 1em;
  width: 100%;
}

.cardinfo-cvv {
  width: 100%;
}

#button-pay {
  cursor: pointer;
  width: 16em;
  font-size: 15px;
  border: 0;
  padding: 1.2em 1em;
  color: #fff;
  background: #282c37;
  border-radius: $radius;
  z-index: 0;
  transform: translateY(-100px);
  transition: all 500ms $bouncy;
  opacity: 0;
  -webkit-appearance: none;
  
  &:hover {
    background: lighten(#282c37, 20%);
  }
  &:active {
    animation: cardIntro 200ms $bouncy;
  }
  &.show-button {
    transform: translateY(0);
    opacity: 1;
  }
}

// Card type image styles
.cardinfo-card-number {
  position: relative;
}

#card-image {
  position: absolute;
  top: 2em;
  right: 1em;
  width: 44px;
  height: 28px;
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/346994/card_sprite.png);
  background-size: 86px 458px;
  border-radius: $radius;
  background-position: -100px 0;
  background-repeat: no-repeat;
  margin-bottom: 1em;
  &.visa {
    background-position: 0 -398px;
  }
  &.master-card {
    background-position: 0 -281px;
  }
  &.american-express {
    background-position: 0 -370px;
  }
  &.discover {
    background-position: 0 -163px;
  }
  &.maestro {
    background-position: 0 -251px;
  }
  &.jcb {
    background-position: 0 -221px;
  }
  &.diners-club {
    background-position: 0 -133px;
  }
}

/*--------------------
Inputs 
--------------------*/

// Styling for input wrappers, internal font styles are handled in javascript
.input-wrapper {
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.86);
  height: 2.75em;
  border: 1px solid #eee;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
  padding: 5px 10px;
  margin-bottom: 1em;
}

.cardinfo-card-number,
.cardinfo-exp-date,
.cardinfo-cvv {
  transition: transform 0.3s;
}

// Change styles of the input wrappers using Braintree's provided classes.   
// Styles the wrapper of the focused input
.braintree-hosted-fields-focused {
  border-color: $blue;
}

// Styles the wrapper of the invalid input
.braintree-hosted-fields-invalid {
  border-color: $red;
  animation: shake 500ms $bouncy both;
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
  perspective: 1000px;
}


/*--------------------
Animations
--------------------*/

@keyframes cardIntro {
  0% {
    transform: scale(0.8) translate(0, 0);
    opacity: 0;
  }
  100% {
    transform: scale(1) translate(0, 0);
    opacity: 1;
  }
}

@keyframes shake {
  10%,
  90% {
    transform: translate3d(-1px, 0, 0);
  }
  20%,
  80% {
    transform: translate3d(1px, 0, 0);
  }
  30%,
  50%,
  70% {
    transform: translate3d(-3px, 0, 0);
  }
  40%,
  60% {
    transform: translate3d(3px, 0, 0);
  }
}
View Compiled
var form = document.querySelector('#my-sample-form');
var submit = document.querySelector('input[type="submit"]');

braintree.client.create({
  authorization: 'sandbox_g42y39zw_348pk9cgf3bgyw2b'
}, function (err, clientInstance) {
  if (err) {
    console.error(err);
    return;
  }

  // Create input fields and add text styles  
  braintree.hostedFields.create({
    client: clientInstance,
    styles: {
      'input': {
        'color': '#282c37',
        'font-size': '16px',
        'transition': 'color 0.1s',
        'line-height': '3'
      },
      // Style the text of an invalid input
      'input.invalid': {
        'color': '#E53A40'
      },
      // placeholder styles need to be individually adjusted
      '::-webkit-input-placeholder': {
        'color': 'rgba(0,0,0,0.6)'
      },
      ':-moz-placeholder': {
        'color': 'rgba(0,0,0,0.6)'
      },
      '::-moz-placeholder': {
        'color': 'rgba(0,0,0,0.6)'
      },
      ':-ms-input-placeholder': {
        'color': 'rgba(0,0,0,0.6)'
      }

    },
    // Add information for individual fields
    fields: {
      number: {
        selector: '#card-number',
        placeholder: '1111 1111 1111 1111'
      },
      cvv: {
        selector: '#cvv',
        placeholder: '123'
      },
      expirationDate: {
        selector: '#expiration-date',
        placeholder: '10 / 2019'
      }
    }
  }, function (err, hostedFieldsInstance) {
    if (err) {
      console.error(err);
      return;
    }

    hostedFieldsInstance.on('validityChange', function (event) {
      // Check if all fields are valid, then show submit button
      var formValid = Object.keys(event.fields).every(function (key) {
        return event.fields[key].isValid;
      });

      if (formValid) {
        $('#button-pay').addClass('show-button');
      } else {
        $('#button-pay').removeClass('show-button');
      }
    });

    hostedFieldsInstance.on('empty', function (event) {
      $('header').removeClass('header-slide');
      $('#card-image').removeClass();
      $(form).removeClass();
    });

    hostedFieldsInstance.on('cardTypeChange', function (event) {
      // Change card bg depending on card type
      if (event.cards.length === 1) {
        $(form).removeClass().addClass(event.cards[0].type);
        $('#card-image').removeClass().addClass(event.cards[0].type);
        $('header').addClass('header-slide');
        
        // Change the CVV length for AmericanExpress cards
        if (event.cards[0].code.size === 4) {
          hostedFieldsInstance.setAttribute({
            field: 'cvv',
            attribute: 'placeholder',
            value: '1234'
          });
        } 
      } else {
        hostedFieldsInstance.setAttribute({
          field: 'cvv',
          attribute: 'placeholder',
          value: '123'
        });
      }
    });

    submit.addEventListener('click', function (event) {
      event.preventDefault();

      hostedFieldsInstance.tokenize(function (err, payload) {
        if (err) {
          console.error(err);
          return;
        }

        // This is where you would submit payload.nonce to your server
        alert('Submit your nonce to your server here!');
      });
    }, false);
  });
});
Rerun