原生JS轮播图插件

代码分两个部分：1、HTML部分，根据注释处理即可；2、play.js插件部分，引到HTML里面即可。

1、HTML部分：

rush:xhtml;"> <Meta charset="UTF-8">

Box">

2、play.js插件部分

rush:js;"> function Banner(width,height) {/*类*/ /*以下最外层div*/ var that = this; this.width = width; this.height = height; this.oBox = document.getElementById("Box"); this.oBox.style.width = width; this.oBox.style.height = height; this.oBox.style.margin = "0 auto"; this.oBox.style.overflow = "hidden"; this.oBox.style.position = "relative"; /*以下轮播区的div*/ this.oBoxInner = this.oBox.getElementsByTagName('div')[0]; this.oBoxInner.style.height = height; this.oBoxInner.style.position = "absolute"; this.oBoxInner.style.left = 0; this.oBoxInner.style.right = 0; this.aDiv = this.oBoxInner.getElementsByTagName('div');//单个轮播图 this.oBoxInner.innerHTML/* 轮播区的内部后面*/ += this.aDiv[0].outerHTML/*第一个轮播图片的外部*/; this.oBoxInner.style.width = parseFloat(width) * this.aDiv.length + "px";//轮播区的宽度 for (var i = 0; i < this.aDiv.length; i++) {/*遍历轮播区的每个div及其内部的图片*/ this.aDiv[i].style.width = width; this.aDiv[i].style.height = height; this.aDiv[i].style.float = "left"; this.aDiv[i].aimg = this.aDiv[i].getElementsByTagName('img')[0]; this.aDiv[i].aimg.style.width = "100%"; this.aDiv[i].aimg.style.height = "100%"; } /*以下是焦点区部分（定位在轮播区的右下方）*/ var oUl=document.createElement('ul'); for(i=0; i'; } this.oBox.appendChild(oUl); this.oUl = this.oBox.getElementsByTagName('ul')[0]; this.oUl.style.position = "absolute"; this.oUl.style.right = "10px"; this.oUl.style.bottom = "10px"; this.aLi = this.oUl.getElementsByTagName('li'); for (i = 0; i < this.aLi.length; i++) {/*遍历焦点区的每个焦点*/ this.aLi[i].style.width = "18px"; this.aLi[i].style.height = "18px"; this.aLi[i].style.float = "left"; this.aLi[i].style.listStyle = "none"; this.aLi[i].style.background = "green"; this.aLi[i].style.borderRadius = "50%"; this.aLi[i].style.marginLeft = "10px"; this.aLi[i].style.cursor = "pointer"; } /*以下是向左向右两个箭头式按钮*/ for(i=0; i<2; i++){ var oA=document.createElement('a'); oA.href="javascript:;" rel="external nofollow" this.oBox.appendChild(oA); } /*以下是左按钮（点击它，图片向左运动）*/ this.oBtnL = this.oBox.getElementsByTagName('a')[0]; this.oBtnL.style.width = "30px"; this.oBtnL.style.height = "30px"; this.oBtnL.style.position = "absolute"; this.oBtnL.style.top = (parseFloat(this.height) / 2 - 15) + "px"; this.oBtnL.style.left = "30px"; this.oBtnL.style.border = "10px solid red"; this.oBtnL.style.borderLeft = "none"; this.oBtnL.style.borderBottom = "none"; this.oBtnL.style.opacity = "0.3"; this.oBtnL.style.filter = "alpha(opacity=30)"; this.oBtnL.style.display = "none"; this.oBtnL.style.transform = "rotate(-135deg)"; this.oBtnL.onclick = function () { if (that.step <= 0) { that.step = that.aDiv.length - 1; that.css(that.oBoxInner,'left',-that.step * parseFloat(that.width)); } that.step--; that.animate(that.oBoxInner,{left: -that.step * parseFloat(that.width)}); that.bannerTip(); }; /*以下是右按钮（点击它，图片向右运动）*/ this.oBtnR = this.oBox.getElementsByTagName('a')[1]; this.oBtnR.style.width = "30px"; this.oBtnR.style.height = "30px"; this.oBtnR.style.position = "absolute"; this.oBtnR.style.top = (parseFloat(this.height) / 2 - 15) + "px"; this.oBtnR.style.right = "30px"; this.oBtnR.style.border = "10px solid red"; this.oBtnR.style.borderLeft = "none"; this.oBtnR.style.borderBottom = "none"; this.oBtnR.style.opacity = "0.3"; this.oBtnR.style.filter = "alpha(opacity=30)"; this.oBtnR.style.display = "none"; this.oBtnR.style.transform = "rotate(45deg)"; this.oBtnR.onclick = function () { if (that.step >= that.aDiv.length - 1) { that.step = 0; that.css(that.oBoxInner,0) } that.step++; that.animate(that.oBoxInner,{left: -that.step * parseFloat(that.width)},1000); that.bannerTip(); }; /*以下是其它*/ this.step = 0;//记录每次运动 this.timer = null;//定时器 this.init();//初始化轮播图 } Banner.prototype = {//类的原型 constructor: Banner,/*getCss：获取元素的属性值*/ getCss: function (curEle,attr) { var val = null; var reg = null; if (getComputedStyle) {//标准浏览器 val = getComputedStyle(curEle,false)[attr]; } else {//非标准浏览器 if (attr === 'opacity') { val = curEle.currentStyle.filter; //'alpha(opacity=10)' reg = /^alpha$opacity[=:](\d+)$$/i; return reg.test(val) ? reg.exec(val)[1] / 100 : 1; } val = curEle.currentStyle[attr]; } reg = /^[+-]?((\d|([1-9]\d+))(\.\d+)?)(px|pt|rem|em)$/i; return reg.test(val) ? parseInt(val) : val; },/*setCss：设置元素的属性值*/ setCss: function (curEle,attr,value) { if (attr === 'float') { curEle.style.cssFloat = value; curEle.style.styleFloat = value; return; } if (attr === 'opacity') { curEle.style.opacity = value; curEle.style.filter = 'alpha(opacity=' + (value * 100) + ')'; return; } var reg = /^(width|height|top|right|bottom|left|((margin|padding)(top|right|bottom|left)?))$/i; if (reg.test(attr)) { if (!(value === 'auto' || value.toString().indexOf('%') !== -1)) { value = parseFloat(value) + 'px'; } } curEle.style[attr] = value; },/*setGroupCss：设置元素的一组属性值*/ setGroupCss: function (curEle,options) { if (options.toString() !== '[object Object]') return; for (var attr in options) { this.setCss(curEle,options[attr]); } },/*css：getCss、setCss、setGroupCss的合写*/ css: function () { if (typeof arguments[1] === 'string') { if (typeof arguments[2] === 'undefined') { return this.getCss(arguments[0],arguments[1]);//当第三个参数不存在，是获取； } else { this.setCss(arguments[0],arguments[1],arguments[2]);//当第三个参数存在时，是设置； } } if (arguments[1].toString() === '[object Object]') { this.setGroupCss(arguments[0],arguments[1]);//设置元素的一组属性值 } },/*animate：轮播图动画函数*/ animate: function (curEle,target,duration) { /*1.定义动画的运行轨迹*/ function tmpEffect(t,b,c,d) { return b + c / d * t;//开始时的位置+总变化/总时间*已经过去的时间 } /*2.为公式的每个参数做准备*/ var begin = {}; var change = {}; for (var attr in target) { begin[attr] = this.css(curEle,attr); change[attr] = target[attr] - begin[attr]; } duration = duration || 700; var time = 0; var that = this; /*3.开启一个定时器，让时间不断累加；根据时间和公式，求出最新的位置；*/ clearInterval(curEle.timer); //开起一个定时器前，先关闭没用的定时器 curEle.timer = setInterval(function () { time += 10; /*4.定时器停止运动的条件（time>=duration）*/ if (time >= duration) { that.css(curEle,target); clearInterval(curEle.timer); return; } /*5.拿到每个属性的最新值，并且赋值给元素对应的属性；*/ for (var attr in target) { var curPos = tmpEffect(time,begin[attr],change[attr],duration); that.css(curEle,curPos); } },10) },/*初始化轮播图*/ init: function () { var _this = this; /*1.开启自动轮播*/ this.timer = setInterval(function () { _this.autoMove(); },2000); /*2.开启焦点，每个焦点与每张轮播图对应*/ this.bannerTip(); /*3.鼠标移入轮播区，轮播暂停；鼠标移出轮播区，轮播恢复*/ this.over_out(); /*4.点击焦点，响应对应的轮播图片*/ this.handleChange(); },handleChange: function () { for (var i = 0; i < this.aLi.length; i++) { this.aLi[i].index = i; var that = this; this.aLi[i].onclick = function () { that.step = this.index; that.animate(that.oBoxInner,{left: -that.step * parseFloat(that.width)}); that.bannerTip(); } } },autoMove: function () { if (this.step >= this.aDiv.length - 1) { this.step = 0; this.css(this.oBoxInner,0) } this.step++; this.animate(this.oBoxInner,{left: -this.step * parseFloat(this.width)},1000); this.bannerTip(); },bannerTip: function () { var tmpStep = this.step >= this.aLi.length ? 0 : this.step; for (var i = 0; i < this.aLi.length; i++) { this.aLi[i].className = i === tmpStep ? 'on' : null; if (this.aLi[i].className === "on") { this.aLi[i].style.background = "red"; } else { this.aLi[i].style.background = "green"; } } },over_out: function () { var _this = this; _this.oBox.onmouSEOver = function () { clearInterval(_this.timer); _this.oBtnL.style.display = 'block'; _this.oBtnR.style.display = 'block'; }; _this.oBox.onmouSEOut = function () { _this.timer = setInterval(function () { _this.autoMove() },2000); _this.oBtnL.style.display = 'none'; _this.oBtnR.style.display = 'none'; } } };

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