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;
在需要的组件里面引入改js
import {FragmentBanner} from '../../../static/js/banner.js'
使用方式如下