原生JS实现按数据源均分时间点幻灯效果
腾讯新闻详情页有一个事件进展效果, 觉得挺有意思. 于是, 就有了本文的效果: 按数据源均分时间点幻灯. 花了三个多小时写的, 当然, 包括样式与调试. 兼容主流, 建议在Chrom,Firefox,Opera,Safari等标准浏览器中查看. IE下没有阴影及圆角.
实现了根据源数据(样例中是一个JSON数据组)总条数, 均分出时间点以平滑向右动画方式显示在时间线上, 当鼠标划过时间点时, 显示对应的日期及标题. 鼠标划过事件, 充分考虑了用户体验, 当用户快速(无意识移动)从时间点上划过时, 并不触发相应事件.
var JSONData=[{...},{...},...];//数据源,一切皆因它而生,因它而灭 function iTimePoint(iTimeSlideId, dateId, timeLineId, titleTop, titleId, defaultShow){ /* 传入参数说明: * iTimeSlideId: 外围ID名. 本样例DOM中#itimeslide; * dateId: 日期ID名. 本样例DOM中#date; * timeLineId: 时间点分布ID名. 本样例DOM中#timeline; * titleTop: 标题容器上方小三角ID名. 本样例DOM中#titletop; * titleId: 标题容器ID名. 本样例DOM中#title; * defaultShow: 设定初始显示的时间点, 默认为0, 可不传值 */ //参数判断,测试用,成功运行后可删除 if (arguments.length < 5 || arguments.length>6) { alert('参数传入错误,请传入5或6个值! :)'); return false; } //通用方法 var iBase = { //document.getElementById Id: function(name){ return document.getElementById(name); }, //时间点动画显示 PointSlide: function(elem, val){ //可通过修改i+=5中的5控制滑动速度 for (var i = 0; i <= 100; i += 5) { (function(){ //这个pos定义很重要,若直接使用闭包获取到的不是上面的i var pos = i; //平滑移动 setTimeout(function(){ elem.style.left = pos * val / 100 + 'px'; }, (pos + 1) * 10); })(); } }, //为元素添加样式 AddClass: function(elem, val){ //若元素无class,直接赋值 if (!elem.className) { elem.className = val; }else { //否则通过添加空格新增一个class var oVal = elem.className; oVal += ' '; oVal += val; elem.className = val; } }, //获取元素索引 Index: function(cur, obj){ for (var i = 0; i < obj.length; i++) { if (obj[i] == cur) { return i; } } } } //整个函数变量定义区 var dataLen = JSONData.length; var iTimeSilde = iBase.Id(iTimeSlideId); var date = iBase.Id(dateId); var timeLine = iBase.Id(timeLineId); var titletop = iBase.Id(titleTop); var title = iBase.Id(titleId); var iTimeSildeW = iTimeSilde.offsetWidth;//幻灯区实际宽度 var timePoint = document.createElement('ul');//用来存储时间点的ul var timePointLeft = null;//时间点相对于父元素左边距离 var timePointLeftCur = null;//每两个时间点间距 var pointIndex = 0;//时间点在队列中的索引值 var defaultShow = defaultShow || 0;//默认显示的时间 var clearFun=null;//当用户无意识的划过时中止执行 var that=null; //根据数据条数生成对应的时间点html for (var i = 0; i < dataLen; i++) { timePoint.innerHTML += '<li></li>'; } //将时间点插入到时间线DIV中 timeLine.appendChild(timePoint) var timePoints = timeLine.getElementsByTagName('li'); //时间点平滑显示 for (var i = 0; i < timePoints.length; i++) { //每两个时间点间间距 timePointLeftCur = parseInt(iTimeSildeW / (dataLen + 1)); //计算对应时间点左边距 timePointLeft = (i + 1) * timePointLeftCur; //时间点动画形式初始化 iBase.PointSlide(timePoints[i], timePointLeft); //初始显示时间点 setTimeout(function(){ timePoints[defaultShow].onmouseover(); }, 1200); //获取时间点默认class值,为鼠标事件做准备 timePoints[i].oldClassName = timePoints[i].className; timePoints[i].onmouseover = function(){ that = this;//确保clearFun中的this是当前的this //提升用户体验,当用户无意识地划过时不执行函数 clearFun=setTimeout(function(){ //计算出当前时间点索引值,为鼠标划出做准备 pointIndex = iBase.Index(that, timePoints); //去除上一个时间点高亮样式 for (var m = 0; m < timePoints.length; m++) { if (m != pointIndex) { timePoints[m].className = timePoints[m].oldClassName } } //为当前时间点加载高亮样式 iBase.AddClass(that, 'hover'); //切换日期及标题值 date.innerHTML = '<span>' + (JSONData[pointIndex]['date'] || '') + '</span><EM></EM>'; title.innerHTML = '<a href="' + (JSONData[pointIndex]['href'] || '') + '">' + (JSONData[pointIndex]['title'] || '') + '</a>'; //改变日期及标题的位置,此处减去的数字,可根据实际样式调整 date.style.left = ((pointIndex + 1) * timePointLeftCur - 25) + 'px'; titletop.style.left = ((pointIndex + 1) * timePointLeftCur + 6) + 'px'; //当标题框左边距与标题框宽度之和大于外围宽度时,以右边为绝对点 if ((title.offsetWidth + (pointIndex + 1) * timePointLeftCur) < iTimeSildeW) { title.style.left = ((pointIndex + 1) * timePointLeftCur - timePointLeftCur) + 'px'; }else { title.style.left = (iTimeSildeW - title.offsetWidth) + 'px'; } //显示日期/时间点/标题 date.style.display = 'block'; titletop.style.display = 'block'; title.style.display = 'block'; },200);//200为认定无意识划过的时间,可自行调节 } timePoints[i].onmouseout = function(){ //若停留时间低于200ms,认定为无意识划过,中止函数 clearTimeout(clearFun); } } }
var JSONData=[ {'date':'2010-12-25','title':'原生JS实现按数据源均分时间点幻灯片','href':'http://mrthink.net/'}, {'date':'2010-11-01','title':'原生JS获取元素样式属性值的方法','href':'http://mrthink.net/'}, {'date':'2010-10-22','title':'纯CSS实现列表鼠标划过变色','href':'http://mrthink.net/'}, {'date':'2010-09-23','title':'实现checkbox的全选/全不选/点选/行内点选','href':'http://mrthink.net/'}, {'date':'2010-09-05','title':'JS计时器setTimeout()与setInterval()方法的区别','href':'http://mrthink.net/'}, {'date':'2010-06-07','title':'加载xml文档的函数(原生JavaScript版及jQuery版)','href':'http://mrthink.net/'}, {'date':'2010-05-09','title':'限制字符输入数功能(jQ版和原生JS版)','href':'http://mrthink.net/'}, {'date':'2010-04-13','title':'奇或偶数行高亮显示及鼠标划过高亮显示类','href':'http://mrthink.net/'}, {'date':'2010-03-01','title':'结构/表现/行为完全分离的选项卡(jQ版和原生JS版)','href':'http://mrthink.net/'}, {'date':'2010-02-22','title':'简易的点击展开/关闭效果(原生JS版和JQ版)','href':'http://mrthink.net/'}, {'date':'2010-02-01','title':'网站基本优化:php的gzip压缩方法','href':'http://mrthink.net/'}, {'date':'2010-01-20','title':'基于jQuery的渐隐渐显图片轮换幻灯片','href':'http://mrthink.net/'} ];
window.onload = function(){ iTimePoint('itimeslide', 'date', 'timeline', 'titletop','title'); }
相关推荐
luvhl 2020-08-17
liaoxuewu 2020-06-26
北京老苏 2020-06-25
Lophole 2020-06-14
SIMONDOMAIN 2020-06-14
firstboy0 2020-06-14
星星有所不知 2020-10-12
zuncle 2020-09-28
huaoa 2020-09-14
北京老苏 2020-08-17
Kakoola 2020-07-29
drdrsky 2020-07-29
书虫媛 2020-07-08
liaoxuewu 2020-07-08
SIMONDOMAIN 2020-07-08
爱读书的旅行者 2020-07-07
tianzyc 2020-07-04