A Pen by mnmly.

index.html

<div class='small'>minimal counter</div>
<div class='wrapper'>
  <div id="a" />
</div>

<a href="http://mnmly.com" target="_blank">mnmly</a>
<a class='github' href="https://github.com/mnmly/minimal-counter" target="_blank">github</a>

minimal-counter.markdown

minimal counter

A Pen by mnmly on CodePen.

License.

script.coffee

class Counter
  sequence = [9, 8, 7, 6, 5, 4, 3, 2, 1, 0].join('\n')
  constructor: (@el)->
    @el.addClass('counter')
    @el.html(@template)
    @tensPlaceSequence = @el.find('.sequence').eq(0)
    @onesPlaceSequence = @el.find('.sequence').eq(1)
    
  template: """
    <div class='digit'>
      <div class='sequence'>#{sequence}</div>
    </div>
    <div class='digit'>
      <div class='sequence'>#{sequence}</div>
    </div>
  """
  
  countUpTo: (number)->
  
    tensPlace = Math.floor(number / 10)
    onesPlace = number % 10
    
    if tensPlace isnt 0
      @tensPlaceSequence.removeClass('is-hidden')
      setTimeout =>
        @tensPlaceSequence.css
          '-webkit-transform': "translate3d(0, #{- (9 - tensPlace) * 10}%, 0)"
      ,0
    else
      @tensPlaceSequence.addClass('is-hidden')
      
        
    @onesPlaceSequence.css
      '-webkit-transform': "translate3d(0, #{- (9 - onesPlace) * 10}%, 0)"
   
$ ->
  
  counter = new Counter($('#a'))
  setInterval =>
    value = Math.round(Math.random() * 100)
    counter.countUpTo( value )
  , 2000

style.css

.counter {
  font-size: 0;
  height: 60px;
  overflow: hidden;
  font-family: Helvetica Neue;
  font-weight: bold;
  text-align: center;
}
.counter .digit {
  display: inline-block;
  font-size: 56px;
  text-align: center;
}
.counter .sequence {
  width: 0.55em;
  -webkit-transform: translate3d(0, -90%, 0);
  -webkit-transition: -webkit-transform 400ms cubic-bezier(0.86, 0, 0.07, 1) /* easequint*/,
                                  width 400ms ease-in-out,
                                opacity 400ms ease-in-out;
}

.counter .digit:last-child .sequence{
  -webkit-transition-delay: 100ms;
}

.counter .sequence.is-hidden {
  width: 0.02em;
  opacity: 0;
}

body{
  text-align: left;
  margin-top: 100px;
  margin-left: 150px;
}



.small{
  font-family: 'consolas', monospace;
  font-size: 12px;
  color: hsl(0, 0%, 30%);
  text-indent: 2px;
  padding-bottom: 10px;
  position: relative;
  margin-bottom: 30px;
  border-top: 5px solid black;
  width: 200px;
  padding-top: 20px;
}

.small::after{
  content: '';
  display: block;
  position: absolute;
  width: 15px;
  height: 1px;
  background: hsl(0, 0%, 60%);
  bottom: -15px;
  left: 2px;
}


#a{
    display: inline-block;

}
.wrapper{
   color: hsl(0, 0%, 10%);
}

.wrapper::after{
  content: '%';
  font-size: 20px;
  font-family: "Helvetica Neue";
  font-weight: bold;
  position: relative;
  top: -5px;
  display: inline-block;
}


a{
  
  font-family: 'Helvetica Neue';
  font-size: 12px;
  font-weight: bold;
  color: hsl(0, 0%, 100%);
  position: fixed;
  bottom: 50px;
  right: 10px;
  background: hsl(0, 0%, 10%);
  padding: 5px 10px;
  text-decoration: none;
  -webkit-transform: translate3d(0, 0, 1px);
  -webkit-backface-visibility: hidden;
  min-width: 50px;
  text-align: center;
  border: 2px solid black;
}

a.github{
  
  bottom: 10px;
  border: 2px solid black;
  background: white;
  color: black;
}

html #codepen-footer{
  -webkit-transition: -webkit-transform .3s cubic-bezier(0.680, -0.550, 0.265, 1.550);
  -webkit-transform: translate3d(0, 30px, 0) !important;
}


html:hover #codepen-footer{
 -webkit-transform: translate3d(0, 0px, 0) !important;
}