.animated {
  -webkit-animation-duration: 1s;
  animation-duration: 1s;
  -webkit-animation-fill-mode: both;
  animation-fill-mode: both;
}

@media (prefers-reduced-motion) {
  .animated {
    -webkit-animation: unset !important;
    animation: unset !important;
    -webkit-transition: none !important;
    transition: none !important;
  }
}

@-webkit-keyframes shake {
  from,
  to {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
  }

  10%,
  30%,
  50%,
  70%,
  90% {
    -webkit-transform: translate3d(-10px, 0, 0);
    transform: translate3d(-10px, 0, 0);
  }

  20%,
  40%,
  60%,
  80% {
    -webkit-transform: translate3d(10px, 0, 0);
    transform: translate3d(10px, 0, 0);
  }
}

@keyframes shake {
  from,
  to {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
  }

  10%,
  30%,
  50%,
  70%,
  90% {
    -webkit-transform: translate3d(-10px, 0, 0);
    transform: translate3d(-10px, 0, 0);
  }

  20%,
  40%,
  60%,
  80% {
    -webkit-transform: translate3d(10px, 0, 0);
    transform: translate3d(10px, 0, 0);
  }
}

.shake {
  -webkit-animation-name: shake;
  animation-name: shake;
}

$.fn.extend({
  animateCss: function(animationName, callback) {
    var animationEnd = (function(el) {
      var animations = {
        animation: 'animationend',
        OAnimation: 'oAnimationEnd',
        MozAnimation: 'mozAnimationEnd',
        WebkitAnimation: 'webkitAnimationEnd',
      };

      for (var t in animations) {
        if (el.style[t] !== undefined) {
          return animations[t];
        }
      }
    })(document.createElement('div'));

    this.addClass('animated ' + animationName).one(animationEnd, function() {
      $(this).removeClass('animated ' + animationName);

      if (typeof callback === 'function') callback();
    });

    return this;
  },
});

$('input').on('input', function() {
  var value = $(this).val();
  if (!value || value.length < 5) {
    $(this).animateCss('shake', function() {
      $(this).removeClass('shake');
    });
  } else {
    $(this).removeClass('shake');
  }
});