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Button Blip

A Pen By Shaun Crittenden

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HTML

            
              <div class="wrapper">
  <div class="container">
    <button>It&rsquo;s Business Time</button>
  </div>
</div>
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CSS

            
              @import "bourbon";

$primary: #59CD9D;
$duration: 2200ms;
$ease-out-cubic: cubic-bezier(0.215, 0.61, 0.355, 1);


html { box-sizing: border-box; }
*, *:before, *:after { box-sizing: inherit; }
* { margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; }

body {
  font-family: "Avenir Next", "Avenir", "Helvetica Neue", Helvetica, Arial, Sans-serif;
  text-align: center;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrapper {
  display: table;
  width: 100%;
  height: 100%;
}
.container {
  display: table-cell;
  vertical-align: middle;
  padding: 1em 0 1em;
  padding: 30px;
  margin: 0 auto;
}
button {
  background-color: $primary;
  border: none;
  border-radius: 3px;
  color: #fff;
  padding: 1rem 1.6rem;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: .03em;
  position: relative;
  @include animation(button-bounce $duration forwards infinite cubic-bezier(0.165, 0.84, 0.44, 1));
  @include transition(background-color .3s ease);
  
  &:hover {
    background-color: lighten($primary, 8%);
  }
  
  &:focus {
     outline: none;
  }
  
  /*&:before */
  &:after {
    background-color: $primary;
    content: "";
    position: absolute;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    border-radius: 5px;
    @include animation(button-blip $duration forwards infinite $ease-out-cubic);
  }
  
  /*&:hover:before,*/
  &:hover:after {
    border-color: transparent;
  }
}

@include keyframes(button-bounce) {
  0% {
    transform: scale(1);
  }
  10% {
    transform: scale(.96);
  }
  20% {
    transform: scale(1.04);
  }
  52%,
  100% {
    transform: scale(1);
  }
}

@include keyframes(button-blip) {
  0% {
    transform: scaleX(1) scaleY(1);
    opacity: 0;
  }
  10% {
    transform: scaleX(1) scaleY(1);
    opacity: .7;
  }
  30%, 
  99% {
    transform: scaleX(1.08) scaleY(1.35);
    opacity: 0;
  }
  100% {
    transform: scaleX(1) scaleY(1);
    opacity: 0;
  }
}
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JS
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