<div class="centerer">
  <h1>Just Some More</h1>
  <h1>Button Hover Effects</h1>
  <h4>By: <a href="http://kylebrumm.com" target="_blank">Kyle Brumm</a></h4>

  <div class="wrap">
    <a class="btn-0" href="#">Swipe</a>
    <a class="btn-1" href="#">Diagonal Swipe</a>
    <a class="btn-1-2" href="#">Double Swipe</a>
    <a class="btn-2" href="#">Diagonal Close</a>
    <a class="btn-3" href="#"><span>Zoning In</span></a>
    <a class="btn-4" href="#"><span>4 Corners</span></a>
    <a class="btn-5" href="#">Slice</a>
  </div>
  <div class="wrap">
    <a class="btn-6" href="#">Position Aware<span></span></a>
    <a class="btn-7" href="#"><span>Alternate</span></a>
    <a class="btn-8" href="#">Smoosh</a>
    <a class="btn-9" href="#"><span>Vertical Overlap</span></a>
    <a class="btn-10" href="#"><span>Horizontal Overlap</span></a>
    <a class="btn-11" href="#">Collision</a>
  </div>
</div>
@import url(https://fonts.googleapis.com/css?family=Open+Sans:400|Raleway:300);

$btn-width: 250px !default;
$btn-height: 80px !default;
$btn-full: $btn-height+$btn-width !default;
$btn-half: $btn-full/2 !default;
$bg-color: #eeeeee !default;

html {
  padding-top: 50px;
  font-family: 'Open Sans', Helvetica, arial, sans-serif;
  text-align: center;
  background-color: $bg-color;

  *,
  *:before,
  *:after {
    box-sizing: border-box;
    transition: 0.5s ease-in-out;
  }

  i,em,
  b,strong,
  span {
    transition: none;
  }
}

*:before,
*:after {
  z-index: -1;
}

h1,
h4 {
  font-family: 'Raleway', 'Open Sans', sans-serif;
  margin: 0;
  line-height: 1;
}

a {
  text-decoration: none;
  line-height: $btn-height;
  color: black;
}

.centerer {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 1rem
}

@media (min-width: 600px) {
  .wrap {
    width: 50%;
    float: left;
  }
}

[class^="btn-"] {
  position: relative;
  display: block;
  overflow: hidden;
  @include size(100%, $btn-height);
  max-width: $btn-width;
  margin: 1rem auto;
  text-transform: uppercase;
  border: 1px solid currentColor;
}

.btn-0 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);

  &:before {
    content: '';
    @include absolute(0,0,0,0);
    background-color: $btn-color-dark;
    transform: translateX(-100%);
  }

  &:hover {
    color: tint($btn-color, 75%);

    &:before {
      transform: translateX(0);
    }
  }
}

.btn-1 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before {
    content: '';
    @include absolute(0,-50px,0,0);
    border-right: 50px solid transparent;
    border-bottom: $btn-height solid $btn-color-dark;
    transform: translateX(-100%);
  }

  &:hover {
    color: tint($btn-color, 75%);

    &:before {
      transform: translateX(0);
    }
  }
}

.btn-1-2 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before,
  &:after {
    content: '';
    @include absolute(0,0,0,0);
    border-bottom: $btn-height solid $btn-color-dark;
  }
  
  &:before {
    right: -50px;
    border-right: 50px solid transparent;
    transform: translateX(-100%);
  }
  
  &:after {
    left: -50px;
    border-left: 50px solid transparent;
    transform: translateX(100%);
  }

  &:hover {
    color: tint($btn-color, 75%);

    &:before { transform: translateX(-40%); }
    &:after { transform: translateX(40%); }
  }
}

.btn-2 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before,
  &:after {
    content: '';
    @include absolute(0,0,0,0);
  }

  &:before {
    right: -50px;
    border-right: 50px solid transparent;
    border-bottom: $btn-height solid $btn-color-dark;
    transform: translateX(-100%);
  }
  
  &:after {
    left: -50px;
    border-left: 50px solid transparent;
    border-top: $btn-height solid $btn-color-dark;
    transform: translateX(100%);
  }

  &:hover {
    color: tint($btn-color, 75%);

    &:before { transform: translateX(-49%); }
    &:after { transform: translateX(49%); }
  }
}

.btn-3 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);

  &:before,
  &:after {
    content: '';
    @include absolute(0,0,0,0);
    border-top: $btn-height/2 solid $btn-color-dark;
    border-bottom: $btn-height/2 solid $btn-color-dark;
  }
  
  &:before {
    border-right: $btn-height/2 solid transparent;
    transform: translateX(-100%);
  }

  &:after {
    border-left: $btn-height/2 solid transparent;
    transform: translateX(100%);
  }

  &:hover {
    color: tint($btn-color, 75%);
    
    &:before { transform: translateX(-30%); }    
    &:after { transform: translateX(30%); }
  }
}

.btn-4 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before,
  &:after,
  span:before,
  span:after {
    content: '';
    @include absolute(0,0,0,0);
    background-color: $btn-color-dark;
  }
  
  &:before { transform: translate(-100%, -100%); }
  &:after { transform: translate(-100%, 100%); }
  span:before { transform: translate(100%, -100%); }
  span:after { transform: translate(100%, 100%); }
  
  &:hover {
    color: tint($btn-color, 75%);

    &:before { transform: translate(-50%, -50%); }
    &:after { transform: translate(-50%, 50%); }
    span:before { transform: translate(50%, -50%); }
    span:after { transform: translate(50%, 50%); }
  }
}

.btn-5 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
	color: tint($btn-color);
  @include triangle(up-right, 0, $btn-color-dark, true);
  @include triangle(down-left, 0, $btn-color-dark, true, before);

  &:before,
  &:after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border: 0 solid;
    transform: rotate(360deg);
  }
  
  &:before {
    bottom: 0;
    left: 0;
    border-color: transparent transparent transparent $btn-color-dark;
  }

  &:after {
    top: 0;
    right: 0;
    border-color: transparent $btn-color-dark transparent transparent;
  }

  &:hover {
    color: tint($btn-color, 75%);
    
    &:before,
    &:after {
      border-width: $btn-height $btn-width*1.05;
    }
  }
}

.btn-6 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
	color: tint($btn-color);
  
  span {
    @include absolute();
    display: block;
    @include size(0);
    border-radius: 50%;
    background-color: $btn-color-dark;
    transition: width 0.4s ease-in-out, height 0.4s ease-in-out;
    transform: translate(-50%, -50%);
    z-index: -1;
  }
  
  &:hover {
    color: tint($btn-color, 75%);
    
    span {
      @include size(225%, $btn-width*2.25);
    }
  }
  
  &:active {
    background-color: $btn-color;
  }
}

.btn-7 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before,
  &:after,
  span:before,
  span:after {
    content: '';
    @include absolute(0);
    @include size(25.25%, 0);
    background-color: $btn-color-dark;
  }
  
  &:before { left: 0; }
  &:after { left: 50%; }
  
  span {
    &:before,
    &:after {
      top: auto;
      bottom: 0;
    }
    
    &:before { left: 25%; }
    &:after { left: 75%; }
  }
  
  &:hover {
    color: tint($btn-color, 75%);
    
    &:before,
    &:after,
    span:before,
    span:after {
      height: $btn-height;
    }
  }
}

.btn-8 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before,
  &:after {
    content: '';
    @include absolute(0,0,0,0);
    background-color: $btn-color-dark;
  }
  
  &:before { transform: translateY(-100%); }
  &:after { transform: translateY(100%); }
  
  &:hover {
    color: tint($btn-color, 75%);
    
    &:before { transform: translateY(-50%); }
    &:after { transform: translateY(50%); }
  }
}

.btn-9 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before,
  &:after,
  span:before,
  span:after {
    content: '';
    @include absolute(0,null,null,0);
    @include size(100%, 0);
    background-color: rgba($btn-color-dark, 0.25);
    transition: 0.4s ease-in-out;
  }
  
  &:after,
  span:before {
    top: auto;
    bottom: 0;
  }
  
  span:before,
  span:after {
    transition-delay: 0.4s;
  }
  
  &:hover {
    color: tint($btn-color, 75%);
    
    &:before,
    &:after,
    span:before,
    span:after {
      height: $btn-height;
    }
  }
  
  &:active {
    background-color: $btn-color;
  }
}

.btn-10 {
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before,
  &:after,
  span:before,
  span:after {
    content: '';
    @include absolute(0,null,null,0);
    @include size(0, $btn-height);
    background-color: rgba($btn-color-dark, 0.25);
    transition: 0.4s;
  }
  
  &:after,
  span:before {
    left: auto;
    right: 0;
  }
  
  span:before,
  span:after {
    transition-delay: 0.4s;
  }
  
  &:hover {
    color: tint($btn-color, 75%);
    
    &:before,
    &:after,
    span:before,
    span:after {
      width: $btn-width;
    }
  }
  
  &:active {
    background-color: $btn-color;
  }
}

@keyframes criss-cross-left {
  0% {
    left: -20px;
  }
  50% {
    left: 50%;
    @include size(20px);
  }
  100% {
    left: 50%;
    @include size($btn-width*1.5);
  }
}

@keyframes criss-cross-right {
  0% {
    right: -20px;
  }
  50% {
    right: 50%;
    @include size(20px);
  }
  100% {
    right: 50%;
    @include size($btn-width*1.5);
  }
}

.btn-11 {
  position: relative;
  $btn-color: random-color($max:200);
  $btn-color-dark: shade($btn-color, 40%);
  color: tint($btn-color);
  
  &:before,
  &:after {
    @include absolute(50%);
    content: '';
    @include size(20px);
    background-color: $btn-color;
    border-radius: 50%;
  }
  
  &:before {
    left: -20px;
    transform: translate(-50%, -50%);
    // animation: criss-cross-left 0.8s reverse;
  }
  
  &:after {
    right: -20px;
    transform: translate(50%, -50%);
    // animation: criss-cross-right 0.8s reverse;
  }
  
  &:hover {
    color: tint($btn-color, 75%);

    &:before,
    &:after {
      // @include size($btn-width);
    }
    
    &:before {
      animation: criss-cross-left 0.8s both;
      animation-direction: alternate;
    }
    
    &:after {
      animation: criss-cross-right 0.8s both;
      animation-direction: alternate;
    }
  }
}
$(function() {  
  $('.btn-6')
    .on('mouseenter', function(e) {
			var parentOffset = $(this).offset(),
      		relX = e.pageX - parentOffset.left,
      		relY = e.pageY - parentOffset.top;
			$(this).find('span').css({top:relY, left:relX})
    })
    .on('mouseout', function(e) {
			var parentOffset = $(this).offset(),
      		relX = e.pageX - parentOffset.left,
      		relY = e.pageY - parentOffset.top;
    	$(this).find('span').css({top:relY, left:relX})
    });
  $('[href=#]').click(function(){return false});
});

External CSS

  1. https://codepen.io/kjbrum/pen/myyZLq

External JavaScript

  1. //cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js
  2. https://s.codepen.io/assets/libs/modernizr.js