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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <div class="credit-card">
  <div class="front animate">
    <i class="box"></i>
    <i class="logo"></i>
    <span class="number">0000 0000 0000 0000</span>
  </div>
  <div class="back">
    <i class="scan"></i>
    <i class="info"></i>
  </div>
</div>
!

CSS 

              
                $purple: #663554;
$lightpurple: #b38570;
$gold: #ffd58c;
$highlight: #6d5e46;
$time: 3.4;

/**********************

GENERAL STYLING

**********************/

body {
  font-family: 'Verdana', sans-serif;
  padding: 0;
  margin: 0;
  background: #ff7b4a;
}

.credit-card {
  position: absolute;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  animation: flip $time+s infinite linear;
}
@keyframes flip {
  from {
    transform: rotateY( 0deg );
  }
  to {
    transform: rotateY( 360deg );
  }
}

.front, .back {
  position: absolute;
  top: calc(50% - 30px);
  left: calc(50% - 50px);
  display: block;
  width: 100px;
  height: 60px;
  border-radius: 5px;
  backface-visibility: hidden;
  background: $purple;
}

/**********************

FRONT OF CARD

**********************/

.front {
  transform: translate3d(0,0,0); // fixes absolute position
}

.box {
  position: absolute;
  top: 10px;
  left: 6px;
  display: block;
  width: 19px;
  height: 15px;
  border-radius: 2px;
  background: $gold;
  transform-origin: 0;
  transform: scaleX(0);
  &:after {
    content: '';
    display: block;
    width: 1px;
    height: 1px;
    box-shadow:
      // Top Left Box
      9px 0 $purple,
      9px 1px $purple,
      9px 2px $purple,
      0 3px $purple,
      1px 3px $purple,
      2px 3px $purple,
      3px 3px $purple,
      4px 3px $purple,
      5px 3px $purple,
      6px 3px $purple,
      7px 3px $purple,
      8px 3px $purple,
      9px 3px $purple,
      
      // Middle Line
      4px 4px $purple,
      4px 5px $purple,
      4px 6px $purple,
      
      // Top Right Box
      13px 0 $purple,
      13px 1px $purple,
      13px 2px $purple,
      13px 3px $purple,
      13px 4px $purple,
      13px 5px $purple,
      13px 6px $purple,
      13px 7px $purple,
      14px 7px $purple,
      15px 7px $purple,
      16px 7px $purple,
      17px 7px $purple,
      18px 7px $purple,
      
      // Bottom Left Box
      0 7px $purple,
      1px 7px $purple,
      2px 7px $purple,
      3px 7px $purple,
      4px 7px $purple,
      5px 7px $purple,
      6px 7px $purple,
      7px 7px $purple,
      8px 7px $purple,
      9px 7px $purple,
      9px 8px $purple,
      9px 9px $purple,
      9px 10px $purple,
      9px 11px $purple,
      9px 12px $purple,
      9px 13px $purple,
      9px 14px $purple,
      9px 15px $purple,
      
      // Bottom Right Box
      18px 11px $purple,
      17px 11px $purple,
      16px 11px $purple,
      15px 11px $purple,
      14px 11px $purple,
      13px 11px $purple,
      12px 11px $purple,
      11px 11px $purple,
      10px 11px $purple,
      9px 11px $purple,
      8px 11px $purple,
      7px 11px $purple,
      6px 11px $purple,
      5px 11px $purple,
      4px 11px $purple,
      4px 12px $purple,
      4px 13px $purple,
      4px 14px $purple,
      4px 15px $purple,
  }
}
@keyframes scaleBox {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

.logo {
  position: absolute;
  top: 10px;
  right: 6px;
  display: block;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  &:before {
    content: '';
    @extend .logo;
    top: 0;
    right: 8px;
    background: $lightpurple;
    transform: scale(0);
  }
  &:after {
    content: '';
    @extend .logo;
    top: 0;
    right: 10px;
    background: $gold;
    transform: scale(0);
  }
}
@keyframes scaleLogo {
  0% {
    transform: scale(0);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}
@keyframes scaleLogo2 {
  0% {
    transform: scale(0) translate(0);
  }
  50% {
    transform: scale(1.1) translate(5px);
  }
  100% {
    transform: scale(1) translate(8px);
  }
}

.number {
  position: absolute;
  bottom: 12px;
  right: 6px;
  font-size: 8px;
  color: $gold;
  &:after {
    content: '';
    position: absolute;
    top: 0;
    left: -2px;
    display: block;
    width: 94px;
    height: 9px;
    background: $purple;
    transform-origin: 94px;
    transform: scaleX(1);
  }
}
@keyframes scaleNumber {
  from {
    transform: skew(30deg) scaleX(1);
  }
  to {
    transform: skew(30deg) scaleX(0);
  }
}

/**********************

BACK OF CARD

**********************/

.back {
  transform: rotateY( 180deg ) translate3d(0,0,0); 
}

.scan {
  position: absolute;
  top: 10px;
  display: block;
  width: 100px;
  height: 13px;
  overflow: hidden;
  background: #000;
  transform-origin: 0;
  transform: scale(0);
  
  // Highlight
  &:after {
    content: '';
    display: block;
    width: 5px;
    height: 100%;
    background: $highlight;
    box-shadow:
      10px 0 $highlight,
      14px 0 $highlight,
      25px 0 $highlight;
    transform: skewX(-40deg) translate(110px);
  }
}
@keyframes highlight {
  from {
    transform: skewX(-40deg) translate(-35px);
  }
  to {
    transform: skewX(-40deg) translate(110px);
  }
}

.info {
  position: absolute;
  left: 6px;
  bottom: 16px;
  display: block;
  width: 38px;
  height: 10px;
  background: $gold;
  transform-origin: 0;
  transform: scale(0);
  &:after {
    content: '';
    @extend .info;
    top: 0;
    left: 44px;
    width: 16px;
  }
}

.animate {
  
  .box {
    animation: scaleBox ($time/7)+s forwards;
  }
  .logo {
    &:before {
      animation: scaleLogo2 ($time/7)+s .15s forwards;
    }
    &:after {
      animation: scaleLogo ($time/7)+s forwards;
    }
  }
  .number:after {
    animation: scaleNumber 1s forwards;
  }
  
  .scan {
    animation: scaleBox .5s forwards;
    &:after {
      animation: highlight 1.75s forwards;
    }
  }
  .info {
    animation: scaleBox 1s forwards;
    &:after {
      animation: scaleBox 1s .6s forwards;
    }
  }
}
!

JS 

              
                function toggleClasses() {
  
  $('.front').toggleClass('animate');
  $('.back').toggleClass('animate');
}

setTimeout(function() {
  
  toggleClasses();
  
  setInterval(function() {

    toggleClasses();
  }, 3400/2);
}, 3400/4);
!
999px

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