<div class="demo__card">
 <div class="demo__card__top brown">
 <div class="demo__card__img"></div>
 <p class="demo__card__name">Hungry cat</p>
 </div>
 <div class="demo__card__btm">
 <p class="demo__card__we">Whatever</p>
 </div>
 <div class="demo__card__choice m--reject"></div>
 <div class="demo__card__choice m--like"></div>
 <div class="demo__card__drag"></div>
</div> 

function pullChange() {
 animating = true;
 deg = pullDeltaX / 10;
 $card.css('transform', 'translateX(' + pullDeltaX + 'px) rotate(' + deg + 'deg)');
 var opacity = pullDeltaX / 100;
 var rejectOpacity = opacity >= 0 "htmlcode">

<div class="demo__card">
 <div class="demo__card__top brown">
 <div class="demo__card__img"></div>
 <p class="demo__card__name">Hungry cat</p>
 </div>
 <div class="demo__card__btm">
 <p class="demo__card__we">Whatever</p>
 </div>
 <div class="demo__card__choice m--reject"></div>
 <div class="demo__card__choice m--like"></div>
 <div class="demo__card__drag"></div>
</div> 


m--reject是向左移动图片时的图层，m--like是向右移动图片时的图层，demo__card__drag是拖动层。
JavaScript
在jQuery代码中，pullChange()函数用于设置向左和向右两个滑动层的旋转角度和透明度。release()函数用于判断用户是向左还是向右滑动手指，并为这些动作在DOM元素上添加相应的class。


function pullChange() {
 animating = true;
 deg = pullDeltaX / 10;
 $card.css('transform', 'translateX(' + pullDeltaX + 'px) rotate(' + deg + 'deg)');
 var opacity = pullDeltaX / 100;
 var rejectOpacity = opacity >= 0 "htmlcode">

$(document).on('mousedown touchstart', '.demo__card:not(.inactive)', function (e) {
 if (animating)
  return;
 $card = $(this);
 $cardReject = $('.demo__card__choice.m--reject', $card);
 $cardLike = $('.demo__card__choice.m--like', $card);
 var startX = e.pageX || e.originalEvent.touches[0].pageX;
 $(document).on('mousemove touchmove', function (e) {
  var x = e.pageX || e.originalEvent.touches[0].pageX;
  pullDeltaX = x - startX;
  if (!pullDeltaX)
   return;
  pullChange();
 });
 $(document).on('mouseup touchend', function () {
  $(document).off('mousemove touchmove mouseup touchend');
  if (!pullDeltaX)
   return;
  release();
 });
});