vue自定义js图片碎片轮播图切换效果的实现代码

定义一个banner.js文件，代码如下

;window.requestAnimationFrame = window.requestAnimationFrame||function(a){return setTimeout(a,1000/60)};window.cancelAnimationFrame = window.cancelAnimationFrame||clearTimeout;var FragmentBanner = function(option) {  //实例化时，可传的参数  this.whiteList = ['container','controller','size','imgs','size','grid','index','fnTime','boxTime','type'];  //容器将包容控制器  this.container = '.banner';  //默认的控制器  this.controller = {    view : '.banner-view',    btn : '.banner-btn',    num : '.banner-number',    progre : '.banner-progres'  };  //栅格 行*列  this.grid = {    line : 5,    list : 10  };  //容器的大小  this.size = {    width : 1200,    height : 675,  };  //切换类型  this.type = 1;  //索引位置  this.index = 0;  //函数每次切换时间  this.fnTime = 5000;  //栅格每次运动时间  this.boxTime = 2000;  //栅格运动结束的时间  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('获取banner容器失败');  }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('获取'+e+'容器');    }  }  //栅格  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);    }  }  //按钮动作  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);  }  //数量  for(var n = 0,nL = this.imgs.length; n < nL;n++){    var oI = document.createElement('i');    oI.setIndex = n;    oI.onclick = function(obj){      //显示动画      show({        switch : true,        change : obj.setIndex      });    }.bind(this,oI)    this.elem.num.appendChild(oI);  }  this.elem.numFind = this.elem.num.querySelectorAll('i');  //进度条  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);  }  //显示动画  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 = '';    // 下次播放动画时候的进度条    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));    }    //栅格结束运动的时间    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;  //设置初始属性值和结束属性值  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;