;window.requestAnimationFrame = window.requestAnimationFrame||function(a){return setTimeout(a,1000/60)};
window.cancelAnimationFrame = window.cancelAnimationFrame||clearTimeout;
var FragmentBanner = function(option) {
  //實例化時，可傳的參數(shù)
  this.whiteList = ['container','controller','size','imgs','size','grid','index','fnTime','boxTime','type'];
  //容器將包容控制器
  this.container = '.banner';
  //默認的控制器
  this.controller = {
    view : '.banner-view',
    btn : '.banner-btn',
    num : '.banner-number',
    progre : '.banner-progres'
  };
  //柵格 行*列
  this.grid = {
    line : 5,
    list : 10
  };
  //容器的大小
  this.size = {
    width : 1200,
    height : 675,
  };
  //切換類型
  this.type = 1;
  //索引位置
  this.index = 0;
  //函數(shù)每次切換時間
  this.fnTime = 5000;
  //柵格每次運動時間
  this.boxTime = 2000;
  //柵格運動結束的時間
  this.activeTime = new Date();
  for(var a = 0,attrLenght = this.whiteList.length; a < attrLenght;a++){
    var attr = this.whiteList[a];
    if(option[attr] != undefined){
      this[attr] = option[attr];
    }
  }
  for(var i in option){
    if(this.whiteList[i] !== undefined){ ; }
  }
  init();
}
function setIndex(){
  this.index %= this.imgs.length;
  this.index = (this.index < 0) ? this.imgs.length - 1 : this.index;
  this.elem.numFind[this.index].className = 'on'; 
}
function init(){
  this.container = document.querySelector(this.container)
  if(!this.container){
    return alert('獲取banner容器失敗');
  }else{
    this.container.style.width = this.size.width+'px';
    this.container.style.height = this.size.height+'px';
  }
  this.elem = {};
  for(var e in this.controller){
    this.elem[e] = this.container.querySelector(this.controller[e]);
    if(this.elem[e] == null){
      return alert('獲取'+e+'容器');
    }
  }
  //柵格
  var w = this.size.width / this.grid.list,
    h = this.size.height / this.grid.line;
  this.elem.viewBox = new Array();
  for(var i = 0,iL = this.grid.line;i < iL;i++){
    for(var j = 0,jL = this.grid.list;j < jL;j++){
      var newI = document.createElement('i');
      setCss(newI,{
        width : w+'px',
        height : h+'px',
        left : 0,
        top : 0,
        opacity : 1,
        backgroundImage : 'url("'+this.imgs[this.index]+'")',
        backgroundSize : this.size.width + 'px ' + this.size.height +'px',
        backgroundPosition : w * -j+'px ' + h * -i+'px'
      });
      this.elem.view.appendChild(newI);
      this.elem.viewBox.push(newI);
    }
  }
  //按鈕動作
  for (var b = 1; b >= 0; b--) {
    var oB = document.createElement('span');
    (b) ? oB.innerHTML = '<' : oB.innerHTML = '>';
    oB.setIndex = b;
    oB.onclick = function(obj){
      show({
        switch : true,
        change : obj.setIndex == 0
      });
    }.bind(this,oB);
    this.elem.btn.appendChild(oB);
  }
  //數(shù)量
  for(var n = 0,nL = this.imgs.length; n < nL;n++){
    var oI = document.createElement('i');
    oI.setIndex = n;
    oI.onclick = function(obj){
      //顯示動畫
      show({
        switch : true,
        change : obj.setIndex
      });
    }.bind(this,oI)
    this.elem.num.appendChild(oI);
  }
  this.elem.numFind = this.elem.num.querySelectorAll('i');
  //進度條
  this.progre = new Array;
  for(var p = 1;p >= 0;p--){
    var oP = document.createElement('i');
    setCss(oP,{
      width : 0,
      backgroundColor : p ? '#00c3ff' : '#ffc300'
    });
    this.elem.progre.appendChild(oP);
    this.progre.push(oP);
  }
  //顯示動畫
  show();
  this.elem.numFind[this.index].className = 'on';
}
function setCss(obj,json){
  for( c in json){
    if(c == 'opacity'){
      obj.style.opacity = c;
      obj.style.filter = "alpha(opacity="+ (json[c]*100) +")";
    }else{
      obj.style[c] = json[c];
    }
  }
  return this;
}
function show(order){
  order = order || {};
  if(new Date() >= this.activeTime){
    this.elem.numFind[this.index].className = '';
    // 下次播放動畫時候的進度條
    setCss(this.progre[1],{width : 0})
    anime(this.progre[1],{
        width : this.size.width
      },this.fnTime,function(){
        show({
          switch : true,
          change : true
        });
      }.bind(this));
    var status = true,
      activeTime = 0;
    for( var i = 0,iL = this.elem.viewBox.length;i < iL;i++ ){
      var startTime = getTypeTime(),
        endTime = getTypeTime(),
        obj = this.elem.viewBox[i];
        activeTime = Math.max(activeTime,startTime[1] + endTime[1]);
      anime(obj,{
        left : Math.ceil(Math.random() * this.size.width * 2 - this.size.width),
        top : Math.ceil(Math.random() * this.size.height * 2 - this.size.height),
        opacity: 0
      }, startTime[0] ,function(obj){
        if(order.switch && status){
          if(/number/i.test(typeof order.change)){
            this.index = order.change;
          }else{
            (order.change) ? ++this.index : --this.index;
          }
          setIndex();
          this.elem.numFind[this.index].className = 'on';
          status = false;
        }
        setCss(obj,{backgroundImage : 'url("'+this.imgs[this.index]+'")'})
        anime(obj,{
            left : 0,
            top : 0,
            opacity : 1
          },endTime[0]);
      }.bind(this,obj));
    }
    //柵格結束運動的時間
    this.activeTime = new Date(new Date().getTime() + activeTime);
    setCss(this.progre[0],{width : 0})
    anime(this.progre[0],{width : this.size.width},activeTime);
  }
}
function getTypeTime(){
  var timer = new Array();
  switch(this.type){
    case 1:
      timer.push(this.boxTime / 4 + Math.random() * this.boxTime / 4);
      timer.push(timer[0]);
    break;
    default:
      timer.push([Math.random() * this.boxTime / 5,this.boxTime / 10 * 3]);
      timer.push(timer[0][0] + timer[0][1]);
    break;
  }
  return timer;
}
function anime(obj,attr,endTime,callback) {
  (obj.timer) && cancelAnimationFrame(obj.timer);
  var cssJosn = obj.currentStyle || getComputedStyle(obj,null),
    start = {},end = {},goTime;
  //設置初始屬性值和結束屬性值
  for(var key in attr){
    if(attr[key] != parseFloat(cssJosn[key])){
      start[key] = parseFloat(cssJosn[key]);
      end[key] = attr[key] - start[key];
    }
  }
  goTime = new Date();
  if(endTime instanceof Array){
     (function delayFn(){
       if((new Date() - goTime) >= endTime[0]){
         endTime = endTime[1];
         goTime = new Date();
         ref();
       }else{
         obj.timer = requestAnimationFrame(delayFn);
       }
     })();
  }else{
    ref();
  }
  function ref(){
    var prop = (new Date() - goTime) / endTime;
    (prop >= 1) ? prop = 1 : obj.timer = requestAnimationFrame(ref);
    for(var key in start){
      var val = -end[key] * prop *(prop-2) + start[key];

      if(key == 'opacity'){

        obj.style.opacity = val;
        obj.style.filter = "alpha(opacity="+ (val*100) +")";
      }else{

        obj.style[key] = val+'px';
      }
    }

    (prop === 1) && callback && callback.call(obj);
  };
}
module.exports.FragmentBanner = FragmentBanner;

// html代碼
<header class="js_header mod-header">
   <div class="banner" id="banner1" style="margin: 50px auto;margin-bottom:0px">
      <div class="banner-view"></div>
      <div class="banner-btn"></div>
      <div class="banner-number"></div>
      <div class="banner-progres"></div>
   </div>
 </header>
//css樣式
<style>
.banner{
  position: relative;
  overflow: hidden;
}
.banner-view{
  position: relative;
  height: 100%;
  z-index: 999;
  background-color: #090b22;
  background-repeat: no-repeat;
}
.banner-view i{
  position: relative;
  display: block;
  float: left;
  background-repeat: no-repeat;
}
.banner-btn{
  position: absolute;
  width: 100%;
  height: 0;
  top: 45%;
  font-family: "宋體";
  font-size: 20px;
  z-index: 999;
}
.banner-btn span{
  display: block;
  float: left;
  width: 50px;
  line-height: 50px;
  text-align: center;
  background-color: #27cfc3;
  color: white;
  cursor: pointer;
  font-weight: 800;
  /* position: absolute;
  right:-150px; */
  /* background-image: url(../../../static/images/style-index.d437fb5e.png);
 background-position: -268px -18px;
 width: 56px;
 height: 56px; */
}
/* 
.banner-btn span:first-child{
  left: -150px;
} */
.banner-btn span:hover{
  background-color: rgba(0,0,0,0.6);
}
.banner-btn span + span{
  float: right;
}
.banner-number{
  position: absolute;
  bottom: 35px;
  width: 100%;
  height: 0;
  font-size: 0;
  text-align: center;
  z-index: 1000;
}
.banner-number > *{
  display: inline-block;
  border: 2px solid #fff;
  border-radius: 50%;
  margin: 0 8px;
  width: 10px;
  height: 10px;
  background-color: #00c3ff;
  cursor: pointer;
}
.banner-number > *:hover,
.banner-number > *.on{
  background-color: #ffc300;
}
.banner-progres{
  width: 100%;
  position: absolute;
  bottom: 0;
  height: 3px;
  z-index: 1000;
}
.banner-progres i{
  position: absolute;
  left: 0;
  top: 0;
  border-radius: 3px;
  display: block;
  height: 100%;
  width: 0;
}
</style>
// js的引用
this.obj = {
      container : '#banner1',//選擇容器 必選
      imgs : ['https://www.xuanfengge.com/wp-content/themes/lee3.0/dist/img/banner/1.0bd56759.jpg','https://www.xuanfengge.com/wp-content/themes/lee3.0/dist/img/banner/6.c6b4ec87.jpg'],//圖片集合 必選
      size : {
        width : 1200,
        height : 300
      },//容器的大小 可選
      //行數(shù)與列數(shù) 可選
      grid : {
        line : 12,
        list : 14
      },
      index: 0,//圖片集合的索引位置 可選
      type : 2,//切換類型 1 ， 2 可選
      boxTime : 5000,//小方塊來回運動的時長 可選
      fnTime : 10000//banner切換的時長 可選
   }
mounted () {
  FragmentBanner(this.obj );
 }