www.gusucode.com > Catfish(鲶鱼) CMS系统 PHP版 v4.8.21源码程序 > Catfishcms_v4.8.21/public/common/html/404/js/countUp.js
/* countUp.js by @inorganik v 1.1.0 */ // target = id of html element or var of previously selected html element where counting occurs // startVal = the value you want to begin at // endVal = the value you want to arrive at // decimals = number of decimal places, default 0 // duration = duration of animation in seconds, default 2 // options = optional object of options (see below) function countUp(target, startVal, endVal, decimals, duration, options) { // default options this.options = options || { useEasing : true, // toggle easing useGrouping : true, // 1,000,000 vs 1000000 separator : ',', // character to use as a separator decimal : '.' // character to use as a decimal } // make sure requestAnimationFrame and cancelAnimationFrame are defined // polyfill for browsers without native support // by Opera engineer Erik Möller var lastTime = 0; var vendors = ['webkit', 'moz', 'ms']; for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) { window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame']; window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame']; } if (!window.requestAnimationFrame) { window.requestAnimationFrame = function(callback, element) { var currTime = new Date().getTime(); var timeToCall = Math.max(0, 16 - (currTime - lastTime)); var id = window.setTimeout(function() { callback(currTime + timeToCall); }, timeToCall); lastTime = currTime + timeToCall; return id; } } if (!window.cancelAnimationFrame) { window.cancelAnimationFrame = function(id) { clearTimeout(id); } } var self = this; this.d = (typeof target === 'string') ? document.getElementById(target) : target; this.startVal = Number(startVal); this.endVal = Number(endVal); this.countDown = (this.startVal > this.endVal) ? true : false; this.startTime = null; this.timestamp = null; this.remaining = null; this.frameVal = this.startVal; this.rAF = null; this.decimals = Math.max(0, decimals || 0); this.dec = Math.pow(10, this.decimals); this.duration = duration * 1000 || 2000; // Robert Penner's easeOutExpo this.easeOutExpo = function(t, b, c, d) { return c * (-Math.pow(2, -10 * t / d) + 1) * 1024 / 1023 + b; } this.count = function(timestamp) { if (self.startTime === null) self.startTime = timestamp; self.timestamp = timestamp; var progress = timestamp - self.startTime; self.remaining = self.duration - progress; // to ease or not to ease if (self.options.useEasing) { if (self.countDown) { var i = self.easeOutExpo(progress, 0, self.startVal - self.endVal, self.duration); self.frameVal = self.startVal - i; } else { self.frameVal = self.easeOutExpo(progress, self.startVal, self.endVal - self.startVal, self.duration); } } else { if (self.countDown) { var i = (self.startVal - self.endVal) * (progress / self.duration); self.frameVal = self.startVal - i; } else { self.frameVal = self.startVal + (self.endVal - self.startVal) * (progress / self.duration); } } // decimal self.frameVal = Math.round(self.frameVal*self.dec)/self.dec; // don't go past endVal since progress can exceed duration in the last frame if (self.countDown) { self.frameVal = (self.frameVal < self.endVal) ? self.endVal : self.frameVal; } else { self.frameVal = (self.frameVal > self.endVal) ? self.endVal : self.frameVal; } // format and print value self.d.innerHTML = self.formatNumber(self.frameVal.toFixed(self.decimals)); // whether to continue if (progress < self.duration) { self.rAF = requestAnimationFrame(self.count); } else { if (self.callback != null) self.callback(); } } this.start = function(callback) { self.callback = callback; // make sure values are valid if (!isNaN(self.endVal) && !isNaN(self.startVal)) { self.rAF = requestAnimationFrame(self.count); } else { console.log('countUp error: startVal or endVal is not a number'); self.d.innerHTML = '--'; } return false; } this.stop = function() { cancelAnimationFrame(self.rAF); } this.reset = function() { self.startTime = null; cancelAnimationFrame(self.rAF); self.d.innerHTML = self.formatNumber(self.startVal.toFixed(self.decimals)); } this.resume = function() { self.startTime = null; self.duration = self.remaining; self.startVal = self.frameVal; requestAnimationFrame(self.count); } this.formatNumber = function(nStr) { nStr += ''; var x, x1, x2, rgx; x = nStr.split('.'); x1 = x[0]; x2 = x.length > 1 ? self.options.decimal + x[1] : ''; rgx = /(\d+)(\d{3})/; if (self.options.useGrouping) { while (rgx.test(x1)) { x1 = x1.replace(rgx, '$1' + self.options.separator + '$2'); } } return x1 + x2; } // format startVal on initialization self.d.innerHTML = self.formatNumber(self.startVal.toFixed(self.decimals)); } // Example: // var numAnim = new countUp("SomeElementYouWantToAnimate", 0, 99.99, 2, 2.5); // numAnim.start(); // with optional callback: // numAnim.start(someMethodToCallOnComplete);