ul {
 list-style: none;
 margin: 0;
 padding: 0;
 }

.slide-img-ul {
 white-space: nowrap;
}

.slide-img-ul>li {
 width: 100px;
 height: 100px;
 margin: 10px;
 display: inline-block;
 vertical-align: middle
}

.slide-img-ul>li>img {
 width: 100%;
 height: 100%;
 max-width: 100%;
 max-height: 100%;
}

<div id="slideScroll"></div>
<div id="slideFast"></div>

;(function(window , document) {
 function createImg(ele , opt) {
 var def = {
  arrImg: [
  {src:'../img/LOGO.png' , id:'0'},
  {src:'../img/zu.png' , id:'1'},
  {src:'../img/zu.png' , id:'2'},
  {src:'../img/zu.png' , id:'3'},
  {src:'../img/zu.png' , id:'4'},
  ] ,
  currentData: 0, 
  time: 50 //滑動速度
 }
 //為ele添加css樣式
 ele.style.width = '240px';
 ele.style.height = '120px';
 ele.style.overflow = 'hidden';
 ele.style.border = '1px solid #eee';
 ele.style.boxShadow = '0 0 8px 2px #eee';
 ele.style.position = 'relative';

 //Object.assign(target , source) 方法用于將所有可枚舉屬性的值從一個或多個源對象復制到目標對象 。 返回目標對象。
 var obj = Object.assign(def , opt), 
  _ul = document.createElement('ul'),
  str = '',
  demo

  _ul.setAttribute('class' , 'slide-img-ul') 

 obj.arrImg.map((item , index) => {
  str+='<li><img src='+ item.src+' id='+item.id+'></li>'
 })

 demo=str+str //復制該組圖片以達到無縫連接的視覺效果
 _ul.innerHTML = demo 
 ele.appendChild(_ul)

 var myWay = setInterval(function(){calData(_ul)}, obj.time) //定時器

 function calData(element){
  element.style.marginLeft = -(obj.currentData)+'px'
  obj.currentData++
  //（為什么*120 ？）圖片總寬度（包括margin）為120px , 當第一組圖片剛好溢出父級時 , 父級marginLeft置0;
  if(obj.currentData > obj.arrImg.length*120 ) { 
  obj.currentData = 0;
  }
 }

 ele.onmouseover = function() {
  clearInterval(myWay)
 }

 ele.onmouseout= function() {
  myWay = setInterval(function(){calData(_ul)}, obj.time)
 }
 }

 window.createImg = createImg

 }(window , document))

 window.onload = function() {
 new createImg(document.getElementById('slideScroll'))
 new createImg(document.getElementById('slideFast') ,{time:10})
 }