www.gusucode.com > 高端教育培训门户+论坛网站源码程序 > 整站安装/整站源码/template/wfdsoft_dmegc_160717/deancss/js/index.js
jQuery.fn.countTo = function (options) { options = options || {}; return jQuery(this).each(function () { // set options for current element var settings = jQuery.extend({}, jQuery.fn.countTo.defaults, { from: jQuery(this).data('from'), to: jQuery(this).data('to'), speed: jQuery(this).data('speed'), refreshInterval: jQuery(this).data('refresh-interval'), decimals: jQuery(this).data('decimals') }, options); // how many times to update the value, and how much to increment the value on each update var loops = Math.ceil(settings.speed / settings.refreshInterval), increment = (settings.to - settings.from) / loops; // references & variables that will change with each update var self = this, jQueryself = jQuery(this), loopCount = 0, value = settings.from, data = jQueryself.data('countTo') || {}; jQueryself.data('countTo', data); // if an existing interval can be found, clear it first if (data.interval) { clearInterval(data.interval); } data.interval = setInterval(updateTimer, settings.refreshInterval); // initialize the element with the starting value render(value); function updateTimer() { value += increment; loopCount++; render(value); if (typeof(settings.onUpdate) == 'function') { settings.onUpdate.call(self, value); } if (loopCount >= loops) { // remove the interval jQueryself.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); jQueryself.html(formattedValue); } }); }; jQuery.fn.countTo.defaults = { from: 0, // the number the element should start at to: 0, // the number the element should end at speed: 1000, // how long it should take to count between the target numbers refreshInterval: 100, // how often the element should be updated decimals: 0, // the number of decimal places to show formatter: formatter, // handler for formatting the value before rendering onUpdate: null, // callback method for every time the element is updated onComplete: null // callback method for when the element finishes updating }; function formatter(value, settings) { return value.toFixed(settings.decimals); } // custom formatting example jQuery('#count-number').data('countToOptions', { formatter: function (value, options) { return value.toFixed(options.decimals).replace(/\B(?=(?:\d{3})+(?!\d))/g, ','); } }); // start all the timers jQuery('.timer').each(count); function count(options) { var jQuerythis = jQuery(this); options = jQuery.extend({}, options || {}, jQuerythis.data('countToOptions') || {}); jQuerythis.countTo(options); }