JavaScript 实现鼠标滚轮控制图片轮播

<div class="slide-container" view-count="4">
 <ul>
 <li>
  <img src="images/women/15444293310974910.jpg" alt=""/>
 </li>
 <li>
  <img src="images/women/15444293312083674.jpg" alt=""/>
 </li>
 <li>
  <img src="images/women/15444293313734437.jpg" alt=""/>
 </li>
 <li>
  <img src="images/women/15444293315979953.jpg" alt=""/>
 </li>
 <li>
  <img src="images/women/15444293316955485.jpg" alt=""/>
 </li>
 <li>
  <img src="images/women/15444293317767707.jpg" alt=""/>
 </li>
 </ul>
</div>

.slide-container {
  max-width: 1230px;
  margin: auto;
  overflow: hidden;
 }
 
 .slide-container ul {
  transition: all 0.5s linear;
 }
 
 .slide-container li {
  float: left;
 }
 
 .slide-container img {
  width: 100%;
 }

(function () {
 
 let slider = $('.slide-container'),
  li = slider.find('li'),
  length = li.length,
  curImgIndex = 0; //当前图片索引
 
 //设置ul宽度和li的宽度
 function initSlider() {
  slider.find('ul').css({
  'width': length / slider.attr('view-count') * 100 + '%'
  });
  li.css({
  'width': 'calc(' + 100 / length + '% - 10px)',
  'margin': '0 5px'
  });
 }
 
 //统一处理滚轮滚动事件
 function wheel(event) {
  var delta = 0;
  if (!event) event = window.event;
  if (event.wheelDelta) { //IE、chrome浏览器使用的是wheelDelta，并且值为“正负120”
  delta = event.wheelDelta / 120;
  if (window.opera)
 
  //因为IE、chrome等向下滚动是负值，FF是正值，为了处理一致性，在此取反处理
   delta = -delta;
  } else if (event.detail) { //FF浏览器使用的是detail,其值为“正负3”
  delta = -event.detail / 3;
  }
  if (delta) {
  handle(delta);
 
  //阻止事件冒泡重复执行和屏幕向下滚动
  event.preventDefault() && event.stopPropagation();
  }
 
 }
 
 //上下滚动时的具体处理函数
 function handle(delta) {
 
  //滚轮向上滚动
  if (delta < 0) {
  curImgIndex++;
  } else if (delta > 0) { //向下滚动
  curImgIndex--;
  }
  move();
 }
 
 function move() {
 
  //到达两端则不移动
  if (curImgIndex > li.length - slider.attr('view-count') || curImgIndex < 0){
  if(curImgIndex > 0 ){
   curImgIndex--;
  }else{
   curImgIndex++;
  }
  return false;
  }
  slider.find('ul').css({
  'transform': 'translateX( -' + 100 / length * curImgIndex + '% )'
  })
 }
 
 initSlider();
 
 //绑定滚轮事件兼容性写法
 if (window.addEventListener)
  slider.get(0).addEventListener('DOMMouseScroll', wheel, false);
 slider.get(0).onmousewheel = wheel;
}());