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HTML 

              
                <div class="container">
  <button class="small"></button>
  
  <button class="small spinning-loader"></button>
  <button class="small active"></button>
</div>

<div class="container">
  <button class="normal primary"></button>  
  <button class="normal save"></button>
  <button class="normal edit"></button>
</div>
<div class="container">
  <button class="large"></button>
  
  <button class="large spinning-loader"></button>
  <button class="large active"></button>
</div>
!

CSS 

              
                /**
Author: JH
**/

.container {
  text-align: center;
  padding-top: 50px;
}
/** Default tint **/
$tint-default: #E85757;
/** Transition speed, delay **/
$transition-delay: 0.25s;
/** Speed of the spinning loader (speed = 360deg) **/
$spinning-speed: 1s;
/** Bubble iteration count, 2 looks good imo **/
$bubble-bounces: 2;

/**
Creates a new button size, named by identifier.

@param $identifier Classidentifier of the new size
@param $width Width of button 
@param $height Height of button, also used for spinner
@param $fontSize, default 14px
**/
@mixin button-size($identifier, $width, $height, $fontSize: 14px) {
  button.#{$identifier} {
    height: $height;
    width: $width;
    font-size: $fontSize;
    
    &.spinning-loader {
      height: $height;
      width: $height;
    }
  }
}

/**
Creates a new button theme, named by identifier.

@param $identifier Classidentifier of the new theme
@param $color New buttons color
@param $label Only used for showcase purpose for codepen
**/
@mixin button-theme($identifier, $color, $label: 'Send') {
  button.#{$identifier} {
      border-color: $color;
      color: $color;
      &:hover {
        background-color: $color;
      }
      &:after {
        content: $label;
      }
      &.spinning-loader {
        border-color: rgba(0,0,0,.25);
        border-left-color: $color;
      }
      &.active {
        background: $color;
      }
  }
}

@include button-size(large, 200px, 60px, 16px);
@include button-size(normal, 150px, 50px);
@include button-size(small, 100px, 30px, 12px);

@include button-theme(primary, #57BDE8, 'Primary');
@include button-theme(save, #F7BD51, 'Save');
@include button-theme(edit, #C1E819, 'Edit');

button {
  display: inline-block;
  background: transparent;
  color: $tint-default;
  padding: 0;
  border: 2px solid $tint-default;
  border-radius: 40px;
  text-transform: uppercase;
  outline: 0;
  font: {
    family: 'Roboto', sans-serif;
    weight: bold;
  }
  letter-spacing: 2px;
  transition: all $transition-delay ease;
  width: 150px;
  height: 50px;
  cursor: pointer;
  &:hover {
    background-color: $tint-default;
    color: rgb(255, 255, 255);
  }
  &:active {
    letter-spacing: 1px;
  }
  &:after {
    content: 'Send';
    opacity: 1;
  }
}

.active {
  color: rgb(255, 255, 255) !important;
  background: $tint-default;
  &:after {
    font-family: 'FontAwesome';
    content: "\f00c" !important;
    opacity: 1;
  }
}

.bubble {
  animation: bubble $transition-delay $transition-delay ease $bubble-bounces;
}

@keyframes bubble {
  0% {
    transform: scale(1, 1);
  }
  50% {
    transform: scale(0.95, 0.95);
  }
  100% {
    transform: scale(1, 1);
  }
}

.spinning-loader {
  vertical-align: middle;
  border-radius: 50% !important;
  border: 2px solid rgba(0, 0, 0, .25);
  padding: 0;
  border-left-color: $tint-default;
  background: transparent;
  transform: rotate(0deg);
  color: rgb(255, 255, 255) !important;
  animation: spinning $spinning-speed $transition-delay linear infinite;
  &:after {
    content: '';
    opacity: 0;
  }
  &:hover {
    background-color: transparent !important;
  }
}

@keyframes spinning {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
!

JS 

              
                var msClickDelay    = 500;
var msSpinningTime  = 2000 + msClickDelay;
var msActive        = 2000;

$('button').click(function(ev){
  ev.preventDefault();
  
  var $button = $(this);
  
  setTimeout(function(){
    $button.addClass('spinning-loader');
  }, msClickDelay);
  
  setTimeout(function(){
    $button.removeClass('spinning-loader');
    $button.addClass('active');
  
    $button.addClass('bubble');  
    setTimeout(callback, msActive);
  }, msSpinningTime);
  
  function callback() {
     $button.removeClass('active');
     $button.removeClass('bubble');
  }
});
!
999px

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