// 引用基本的jquery.js
<!-- 数字变化 -->
<div class="list1">
<div class="content f-cb">
<div>
<p class="p1 timer" data-to="2006" data-speed="1500">2006</p>
<p class="p2">06年开始“小组合作学习”研究</p>
</div>
<span></span>
<div>
<p class="p1 timer" data-to="2011" data-speed="1500">2011</p>
<p class="p2">1年成立教育课改中心</p>
</div>
<span></span>
<div>
<p class="p1 timer" data-to="57" data-speed="1500">57</p>
<p class="p2">目前已经有57所实验学校</p>
</div>
<span></span>
<div>
<p class="p1 timer" data-to="506" data-speed="1500">506</p>
<p class="p2">506家课改联盟学校</p>
</div>
</div>
</div>
<script type="text/javascript">
var istrue = true;
$(window).on("scroll",
function() {
var s = $(window).scrollTop();
$(".timer").each(count);
function count(a) {
var b = $(this);
a = $.extend({},
a || {},
b.data("countToOptions") || {});
b.countTo(a)
};
istrue = false;
$(".timer").removeClass("timer")
})
//设置计数
$.fn.countTo = function (options) {
options = options || {};
return $(this).each(function () {
//当前元素的选项
var settings = $.extend({}, $.fn.countTo.defaults, {
from: $(this).data('from'),
to: $(this).data('to'),
speed: $(this).data('speed'),
refreshInterval: $(this).data('refresh-interval'),
decimals: $(this).data('decimals')
}, options);
//更新值
var loops = Math.ceil(settings.speed / settings.refreshInterval),
increment = (settings.to - settings.from) / loops;
//更改应用和变量
var self = this,
$self = $(this),
loopCount = 0,
value = settings.from,
data = $self.data('countTo') || {};
$self.data('countTo', data);
//如果有间断，找到并清除
if (data.interval) {
clearInterval(data.interval);
};
data.interval = setInterval(updateTimer, settings.refreshInterval);
//初始化起始值
render(value);
function updateTimer() {
value += increment;
loopCount++;
render(value);
if (typeof(settings.onUpdate) == 'function') {
settings.onUpdate.call(self, value);
}
if (loopCount >= loops) {
//移出间隔
$self.removeData('countTo');
clearInterval(data.interval);
value = settings.to;
if (typeof(settings.onComplete) == 'function') {
settings.onComplete.call(self, value);
}
}
}
function render(value) {
var formattedValue = settings.formatter.call(self, value, settings);
$self.html(formattedValue);
}
});
};
$.fn.countTo.defaults={
from:0, //数字开始的值
to:0, //数字结束的值
speed:1000, //设置步长的时间
refreshInterval:100, //隔间值
decimals:0, //显示小位数
formatter: formatter, //渲染之前格式化
onUpdate:null, //每次更新前的回调方法
onComplete:null //完成更新的回调方法
};
function formatter(value, settings){
return value.toFixed(settings.decimals);
}
//自定义格式
$('#count-number').data('countToOptions',{
formmatter:function(value, options){
return value.toFixed(options.decimals).replace(/\B(?=(?:\d{3})+(?!\d))/g, ',');
}
});
//定时器
$('.timer').each(count);
function count(options){
var $this=$(this);
options=$.extend({}, options||{}, $this.data('countToOptions')||{});
$this.countTo(options);
}
</script>
