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              <div class="eljamez alphabet">
  <div class="letter e"></div>
  <div class="letter l"></div>
  <div class="letter j off"></div>
  <div class="letter a off"></div>
  <div class="letter m off"></div>
  <div class="letter e off"></div>
  <div class="letter z off"></div>
  <p>a css typeface</p>
</div>

<div class="typer">
  <p>Input your favorite letter in the box below</p>
  <input type="text" maxlength = "1"/>
  <div class="font-container alphabet">
    <div class="letter"></div>
  </div>
</div>

<div class="example alphabet">
  <h1>The letters, in all their glory</h1>
  <div class="letter cycle-letter a"></div>
  <hr>
  <div class="letter a"></div>
  <div class="letter b"></div>
  <div class="letter c"></div>
  <div class="letter d"></div>
  <div class="letter e"></div>
  <div class="letter f"></div>
  <div class="letter g"></div>
  <div class="letter h"></div>
  <div class="letter i"></div>
  <div class="letter j"></div>
  <div class="letter k"></div>
  <div class="letter l"></div>
  <div class="letter m"></div>
  <div class="letter n"></div>
  <div class="letter o"></div>
  <div class="letter p"></div>
  <div class="letter q"></div>
  <div class="letter r"></div>
  <div class="letter s"></div>
  <div class="letter t"></div>
  <div class="letter u"></div>
  <div class="letter v"></div>
  <div class="letter w"></div>
  <div class="letter x"></div>
  <div class="letter y"></div>
  <div class="letter z"></div>
</div>
            
          
!
            
              @import "bourbon";

// colors
$light-gray: #ddd;
$dark-gray: #333;
$border-gray: #ccc;
$border-radius: 10%;

// positions
$sixth: 16.665%;
$third: 33.33%;
$half: 50%;
$two-thirds: 67%;

// box width/height
$box-width: 60px;
$box-height: 60px;

body {
  color: $dark-gray;
  font-family: 'Open Sans', sans-serif;
}

.eljamez, .typer, .example, .looper {
  background: $light-gray;
  border: 1px solid $border-gray;
  border-radius: 3px;
  margin-bottom: 10px;
  overflow: hidden;
  padding: 0px;
  position: relative;
  text-align: center;
}

.checker {
  overflow: hidden;
  h1 {
    color: white;
    text-align: center;
  }
}

.typer {
  input {
    border-radius: 10px;
    border: 0px;
    box-sizing: border-box;
    font-size: 1.5em;
    height: $box-height;
    padding: 20px;
    text-align: center;
    width: $box-width;
  }
}

.alphabet{
  background: $light-gray;
  > div {//Letter
    @include transition(all .5s ease-in-out);
    background: $dark-gray;
    border-radius: $border-radius;
    box-sizing: border-box;
    cursor: pointer;
    display: inline-block;
    height: $box-height;
    margin: 10px;
    position: relative;
    text-align: center;
    width: $box-width;
    &::before, &::after {
      @include transition(all .5s ease-in-out);
      border: 1px solid transparent;
      box-sizing: border-box;
      display: block;
      left: 0%;
      content: '';
      position: absolute;
      top: 0%;
    }
    &.off {
      &::before, &::after {
        @include transform(scale(.5));
        opacity: 0;
      }
    }
  }
  
  // Letters
  .a {
    &::before, &::after {
      border-right: 1px solid $light-gray;
      min-height: $third;
      min-width: $half;
    }
    &::before {
      top: $sixth;
    }
    &::after {
      top: $two-thirds;
    }
  }
  .b {
    &::before {
      border-bottom: 1px solid $light-gray;
      border-top: 1px solid $light-gray;
      left: $third;
      min-height: $third;
      min-width: $third;
      top: $third;
    }
    &::after {
      background: $light-gray;
      border-radius: 50%;
      left: 90%;
      min-height: 20%;
      min-width: 20%;
      top: 40%;
    }
  }
  .c {
    &::before {
      border-bottom: 1px solid $light-gray;
      left: $third;
      min-height: $half;
      min-width: $two-thirds;
    }
  }
  .d {
    &::before {
      background: $dark-gray;
      min-height: 100%;
      min-width: $sixth;
    }
    &::after {
      border-bottom: 1px solid $light-gray;
      left: $third;
      min-height: $half;
      min-width: $third;     
    }
  }
  .e {
    &::before {
      border-bottom: 1px solid $light-gray;
      border-top: 1px solid $light-gray;
      left: $third;
      min-height: $third;
      min-width: $two-thirds;
      top: $third;
    }
  }
  .f {
    &::before, &::after {
      left: $third;
      min-height: $third;
      min-width: $two-thirds;
    }
    &::before {
      border-top: 1px solid $light-gray;
      top: $third;
    }
    &::after {
      border-radius: $border-radius;
      background: $light-gray;
      top: $two-thirds;
    }
  }
  .g {
    &::before {
      background: $light-gray;
      left: $two-thirds;
      min-height: $sixth;
      min-width: $two-thirds;
      top: $third;
    }
    &::after {
      background: $light-gray;
      border-radius: $border-radius;
      left: $third;
      min-height: $third;
      min-width: $half;
      top: $third;
    }
  }
  .h {
    &::before, &::after {
      border-right: 1px solid $light-gray;
      min-height: $third;
      min-width: $half;
    }
    &::before {
      top: 0%;
    }
    &::after {
      top: $two-thirds;
    }
  }
  .i {
    &::before, &::after {
      border-bottom: 1px solid $light-gray;
      min-height: $third;
      min-width: $third;
      top: $sixth;
    }
    &::before {
      left: 0px;
    }
    &::after {
      left: $two-thirds;
    }
  }
  .j {
     &::before {
      background: $light-gray;
      border-radius: 3px;
      min-width: $two-thirds;
      min-height: $two-thirds;
    }
  }
  .k {
    &::before, &::after {
      min-height: $third;
    }
    &::before {
      border-bottom-right-radius: 100%;
      background: $light-gray;
      left: $third;
      min-width: $third;
    }
    &::after {
      border-top-right-radius: 100%;
      background: $light-gray;
      left: $third;
      min-width: $third;
      top: $two-thirds;
    }
  }
  .l {
    &::before {
      background: $light-gray;
      border-radius: $border-radius;
      min-height: $two-thirds;
      left: $third;
      min-width: $two-thirds;
    }
  }

  .m {
    &::before {
      border-right: 1px solid $light-gray;
      min-height: $two-thirds;
      min-width: $third;
      top: $third;
    }
    &::after {
      border-right: 1px solid $light-gray;
      left: $third;
      min-height: $two-thirds;
      min-width: $third;
      top: $third;
    }
  }
  .n {
    &::before {
      border-right: 1px solid $light-gray;
      min-height: $two-thirds;
      min-width: $third;
      top: $third;
    }
    &::after {
      border-right: 1px solid $light-gray;
      left: $third;
      min-height: $two-thirds;
      min-width: $third;
    }
  }
  .o {
    &::after {
      border-bottom: 1px solid $light-gray;
      left: $third;
      min-height: $half;
      min-width: $third;
    }
  }
  .p {
    &::before, &::after {
      min-height: $third;
    }
    &::before {
      border-top: 1px solid $light-gray;
      left: $third;
      min-width: $third;
      top: $third;
    }
    &::after {
      border-radius: $border-radius;
      background: $light-gray;
      left: $third;
      min-width: $two-thirds;
      top: $two-thirds;
    }
  }
  .q {
    &::before {
      background: $dark-gray;
      border-radius: $border-radius;
      left: $two-thirds;
      min-height: $sixth;
      min-width: $sixth;
      top: 100%;
    }
    &::after {
      border-bottom: 1px solid $light-gray;
      border-radius: $border-radius;
      height: $half;
      left: $third;
      width: $third;     
    }
  }
  .r {
    &::before, &::after {
      height: $third;
    }
    &::before {
      border-top: 1px solid $light-gray;
      left: $third;
      min-width: $third;
      top: $third;
    }
    &::after {
      border-top-right-radius: 100%;
      background: $light-gray;
      left: $third;
      min-width: $third;
      top: $two-thirds;
    }
  }
  .s {
    &::before, &::after {
      min-height: $third;
      min-width: $two-thirds;
    }
    &::before {
      border-bottom: 1px solid $light-gray;
      left: $third;
    }
    &::after {
      border-bottom: 1px solid $light-gray;
      top: $third;
   }
  }
  .t {
    &::before, &::after {
      background: $light-gray;
      border-radius: $border-radius;
      min-height: $two-thirds;
      min-width: $third;
      top: $third;
    }
    &::after {
      left: $two-thirds;
    }
  }
  .u {
    &::before {
      border-left: 1px solid $light-gray;
      left: $half;
      min-height: $two-thirds;
      min-width: $third;
    }
    &::after {
      opacity: 0;
    }
  }
  .v {
    overflow: hidden;
    &::before {
      @include transform(rotate(45deg));
      background: $light-gray;
      left: 35%;
      min-height: $third;
      min-width: $third;
      top: -$sixth;
    }
    &::after {
      opacity: 0;
    }
  }
  .w {
    &::before {
      border-left: 1px solid $light-gray;
      border-right: 1px solid $light-gray;
      left: $third;
      min-height: $two-thirds;
      min-width: $third;
    }
  }
  .x {
    background: $light-gray;
    &::before, &::after {
      background: $dark-gray;
      border-radius: $border-radius;
      min-height: 100%;
      min-width: $half;
    }
    &::before {
      @include transform(rotate(45deg));
      left: $half / 2;
    }
    &::after {
      @include transform(rotate(-45deg));
      left: $half / 2;
    }
  }
  .y {
    overflow: hidden;
    &::before {
      border-left: 1px solid $light-gray;
      left: $half;
      min-height: $third;
      min-width: $third;
    }
    &::after {
      background: $light-gray;
      border-top-right-radius: 100%;
      border-bottom-right-radius: 100%;
      min-height: $third;
      min-width: $two-thirds;
      top: $half;
    }
  }
  .z {
    &::before, &::after {
      min-height: $third;
      min-width: $two-thirds;
    }
    &::before {
      border-bottom: 1px solid $light-gray;
    }
    &::after {
      border-bottom: 1px solid $light-gray;
      left: $third;
      top: $third;
    }
  }
}
            
          
!
            
              // create the class for this pen
class FontViewer {
  constructor() {
    this.alphabet = "abcdefghijklmnopqrstuvwxyz".split('');
    this.hoverLetter($('.eljamez'));
    this.autoToggleOnOff($('.eljamez'));
    this.inputLetter($('.typer input'), $('.font-container > .letter'));
    this.loopThroughLetters($('.example > .cycle-letter'));
  }
  loopThroughLetters($letterToAffect) {
    const flipTiming = 1500;
    let i = 0;
    let init = setInterval( () => {
      $letterToAffect.removeClass(this.alphabet[i]);
      if (i >= this.alphabet.length-1) {
        i = -1;
      }
      i++;
      this.animateLetter($letterToAffect, 'flip');//pass in effected element and animate.css animation type
      $letterToAffect.addClass(this.alphabet[i]);
    }, flipTiming);
  }
  animateLetter($element, animationType) {
    // animate.css animate type
    animationType = animationType || "pulse";
    let animationClasses = 'animated ' + animationType; 
    let animationEnd = 'webkitAnimationEnd mozAnimationEnd MSAnimationEnd oanimationend animationend'; 
    $element.addClass(animationClasses).one(animationEnd,function() {
      $element.removeClass(animationClasses);        
    });
  }
  autoToggleOnOff($container) {
    const intervalTiming = 2000;
    let init = setInterval( () => {
      let $toggledLetter = $container.find('.letter');
      this.animateLetter($toggledLetter, 'rubberBand');
      $toggledLetter.toggleClass('off');      
    }, intervalTiming);
  }
  initLetterClick(thisLetter) {
    thisLetter.on('click', () => {
       thisLetter.toggleClass('off');
    });    
  }
  hoverLetter($hoverContainer) {
    for( var i = 0; i < $hoverContainer.find('.letter').length; i++) {
      var thisLetter = $hoverContainer.find('.letter:nth-of-type('+i+')');
      this.initLetterClick(thisLetter);
    }
  }
  inputLetter($input, $outputLetter) {
    $input.on('keyup', () => {
      $outputLetter.removeClass();
      $outputLetter.addClass($($input).val());
      this.animateLetter($outputLetter, 'wobble');
    }); 
  }
}

var fontViewer = new FontViewer();
            
          
!
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