<a href="#" class="button btn1">
  <span>Hey, click me</span>
</a>
<a href="#" class="button btn2">
  <span>No click me!</span>
</a>
<a href="#" class="button btn3">
  <span>Click me please</span>
  <div class="ripple-effect"></div>
</a>
<a href="#" class="button btn4">
  <span>You, click me</span>
  <div class="ripple-effect"></div>
</a>
<label><input type="checkbox"> Enable fade</label>

$primary-color: #1E88E5;
$secondary-color: white;
$button-standard-width: 250px;

body {
  text-align: center; 
  font-family: 'Roboto', sans-serif;
  background-image: url(https://i.imgur.com/kawGZC6.jpg);
  background-size: cover;
  background-position: top center;
  height: 100vh;
  padding-top: 25vh;
  box-sizing: border-box;
  @media (max-width: 560px) {
    background-size: auto 140%;
    padding-top: 20vh;
  }
}
 
.button {
  display: inline-block;
  margin: 0 10px 20px; 
  color: $primary-color;
  border: 2px solid $primary-color;
  border-radius: 4px;
  text-transform: uppercase;
  font-size: 22px;
  font-weight: 500;
  text-decoration: none;
  padding: 15px 40px;
  position: relative;
  overflow: hidden; 
  &:before {
    content: '';
    display: block;
    position: absolute;
  }
  span {
    position: relative;
    z-index: 1;
  }
}
  
.btn1 {
  transition: color 0.3s 0.1s ease-out; 
  &:before {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    width: $button-standard-width;
    height: $button-standard-width;
    box-shadow: inset 0 0 0 0 $primary-color;
    transition: box-shadow 0.5s ease-out;
  }
  &.fade:before {
    box-shadow: none;
  }
  &.active {
    color: $secondary-color;
    &:before {
      box-shadow: inset 0 0 0 $button-standard-width $primary-color;
    }
  }
}

.btn2 {
  transition: color 0.4s ease;
  &:before {
    top: 50%;
    left: 50%;
    transform: translate3d(-50%, -50%, 0) scale(0);
    border-radius: 50%;
    background-color: $primary-color;
    width: 250px;
    height: 250px;
    opacity: 1;
    transition: all 0.4s ease; 
  }
  &.fade:before {
      opacity: 0;
  }
  &.active {
    color: $secondary-color;
    &:before {
      opacity: 1;
      transform: translate3d(-50%, -50%, 0) scale(1);
    }
  }
}

.btn3 {
  transition: color 0.4s ease;
  .ripple-effect {
    position: absolute;
    transform: scale(0) translateZ(0);
    border-radius: 50%;
    background: $primary-color;
    width: $button-standard-width; 
    height: $button-standard-width; 
    opacity: 1;
    transition: transform 0.5s ease, opacity 0.5s ease;
  }
  &.fade .ripple-effect {
      opacity: 0;
  }

  &.active {
    color: $secondary-color;
    .ripple-effect {
      opacity: 1;
      transform: scale(2.5) translateZ(0);
    }
  }
}

.btn4 {
  transition: color 0.2s ease-out;
  .ripple-effect {
    position: absolute;
    border-radius: 50%;
    width: $button-standard-width * 2; 
    height: $button-standard-width * 2; 
    box-shadow: inset 0 0 0 0 $primary-color;
    transition: box-shadow 0.3s ease-out;
  }
  &.fade .ripple-effect {
      box-shadow: none;
  }

  &.active {
    color: $secondary-color;
    .ripple-effect {
      box-shadow: inset 0 0 0 $button-standard-width $primary-color;
    }
  }
}

label {
  position: absolute;
	display: block;
	top: 0;
	right: 0;
	padding: 15px;
	user-select: none;
	input {
		transform: translateY(1px);
	}
}

(function ( $ ) {
    $.fn.ripplePosition = function(e) {
      var x = e.pageX - this.parent().offset().left - this.width()/2;
      var y = e.pageY - this.parent().offset().top - this.height()/2;
      this.css({
        top: y + 'px', 
        left: x + 'px'
      });
      return this;
    };
}( jQuery ));


$('.button').on('click', function(e){
  var $button = $(this);
  var $ripple = $button.children('.ripple-effect');
  if($ripple.length > 0) {
    $ripple.ripplePosition(e);
  }
  
  $button.addClass('active');
  setTimeout(function(){
    $button.removeClass('active');
  }, 2000);
});

$('label input[type="checkbox"]').on('change', function(){
	$('.button').toggleClass('fade');
});