Animated Burger Icon for usage with bourbon.

_burger-icon.scss

.mobile-nav-toggler {
  @include prefixer(transform, rotate(0deg), webkit moz ms o spec);
  @include transition(all 0.5s ease-in-out);
  cursor: pointer;
  height: 21px;
  position: absolute;
  right: 0;
  top: 22px;
  width: 30px;

  span {
    @include prefixer(transform, rotate(0deg), webkit moz ms o spec);
    @include transition(all 0.25s ease-in-out);
    background: red;
    border-radius: 3px;
    display: block;
    height: 3px;
    left: 0;
    opacity: 1;
    position: absolute;
    width: 100%;

    &:nth-child(1) {
      top: 0;
    }

    &:nth-child(2) {
      top: 9px;
    }

    &:nth-child(3) {
      top: 18px;
    }
  }

  &.is-open {
    span {
      &:nth-child(1) {
        @include prefixer(transform, rotate(135deg), webkit moz ms o spec);
        top: 9px;
      }

      &:nth-child(2) {
        left: -60px;
        opacity: 0;
      }

      &:nth-child(3) {
        @include prefixer(transform, rotate(-135deg), webkit moz ms o spec);
        top: 9px;
      }
    }
  }
}

burger-icon.html

<div class="mobile-nav-toggler js-mobile-nav-toggler">
    <span></span>
    <span></span>
    <span></span>
</div>

burger-icon.js

$(document).ready(function(){
  $('.js-mobile-nav-toggler').on('click', function() {
      $(this).toggleClass('is-open');
  });
});