206 lines
8.1 KiB
JavaScript
206 lines
8.1 KiB
JavaScript
/*
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* countUp.js
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* by @inorganik
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* @author @inorganik
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* @copyright Jamie Perkins
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* @license The MIT License (MIT)
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*
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*/
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// target = id of html element or var of previously selected html element where counting occurs
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// startVal = the value you want to begin at
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// endVal = the value you want to arrive at
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// decimals = number of decimal places, default 0
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// duration = duration of animation in seconds, default 2
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// options = optional object of options (see below)
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var CountUp = function(target, startVal, endVal, decimals, duration, options) {
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// make sure requestAnimationFrame and cancelAnimationFrame are defined
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// polyfill for browsers without native support
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// by Opera engineer Erik Möller
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var lastTime = 0;
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var vendors = ['webkit', 'moz', 'ms', 'o'];
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for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
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window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
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window.cancelAnimationFrame =
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window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
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}
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if (!window.requestAnimationFrame) {
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window.requestAnimationFrame = function(callback, element) {
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var currTime = new Date().getTime();
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var timeToCall = Math.max(0, 16 - (currTime - lastTime));
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var id = window.setTimeout(function() { callback(currTime + timeToCall); },
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timeToCall);
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lastTime = currTime + timeToCall;
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return id;
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};
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}
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if (!window.cancelAnimationFrame) {
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window.cancelAnimationFrame = function(id) {
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clearTimeout(id);
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};
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}
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var self = this;
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// default options
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self.options = {
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useEasing : true, // toggle easing
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useGrouping : true, // 1,000,000 vs 1000000
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separator : ',', // character to use as a separator
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decimal : '.', // character to use as a decimal
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easingFn: null, // optional custom easing closure function, default is Robert Penner's easeOutExpo
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formattingFn: null // optional custom formatting function, default is self.formatNumber below
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};
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// extend default options with passed options object
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for (var key in options) {
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if (options.hasOwnProperty(key)) {
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self.options[key] = options[key];
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}
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}
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if (self.options.separator === '') { self.options.useGrouping = false; }
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if (!self.options.prefix) self.options.prefix = '';
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if (!self.options.suffix) self.options.suffix = '';
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self.d = (typeof target === 'string') ? document.getElementById(target) : target;
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self.startVal = Number(startVal);
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self.endVal = Number(endVal);
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self.countDown = (self.startVal > self.endVal);
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self.frameVal = self.startVal;
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self.decimals = Math.max(0, decimals || 0);
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self.dec = Math.pow(10, self.decimals);
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self.duration = Number(duration) * 1000 || 2000;
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self.formatNumber = function(nStr) {
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nStr = nStr.toFixed(self.decimals);
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nStr += '';
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var x, x1, x2, rgx;
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x = nStr.split('.');
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x1 = x[0];
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x2 = x.length > 1 ? self.options.decimal + x[1] : '';
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rgx = /(\d+)(\d{3})/;
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if (self.options.useGrouping) {
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while (rgx.test(x1)) {
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x1 = x1.replace(rgx, '$1' + self.options.separator + '$2');
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}
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}
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return self.options.prefix + x1 + x2 + self.options.suffix;
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};
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// Robert Penner's easeOutExpo
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self.easeOutExpo = function(t, b, c, d) {
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return c * (-Math.pow(2, -10 * t / d) + 1) * 1024 / 1023 + b;
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};
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self.easingFn = self.options.easingFn ? self.options.easingFn : self.easeOutExpo;
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self.formattingFn = self.options.formattingFn ? self.options.formattingFn : self.formatNumber;
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self.version = function () { return '1.7.1'; };
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// Print value to target
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self.printValue = function(value) {
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var result = self.formattingFn(value);
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if (self.d.tagName === 'INPUT') {
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this.d.value = result;
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}
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else if (self.d.tagName === 'text' || self.d.tagName === 'tspan') {
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this.d.textContent = result;
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}
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else {
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this.d.innerHTML = result;
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}
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};
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self.count = function(timestamp) {
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if (!self.startTime) { self.startTime = timestamp; }
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self.timestamp = timestamp;
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var progress = timestamp - self.startTime;
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self.remaining = self.duration - progress;
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// to ease or not to ease
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if (self.options.useEasing) {
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if (self.countDown) {
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self.frameVal = self.startVal - self.easingFn(progress, 0, self.startVal - self.endVal, self.duration);
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} else {
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self.frameVal = self.easingFn(progress, self.startVal, self.endVal - self.startVal, self.duration);
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}
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} else {
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if (self.countDown) {
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self.frameVal = self.startVal - ((self.startVal - self.endVal) * (progress / self.duration));
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} else {
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self.frameVal = self.startVal + (self.endVal - self.startVal) * (progress / self.duration);
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}
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}
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// don't go past endVal since progress can exceed duration in the last frame
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if (self.countDown) {
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self.frameVal = (self.frameVal < self.endVal) ? self.endVal : self.frameVal;
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} else {
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self.frameVal = (self.frameVal > self.endVal) ? self.endVal : self.frameVal;
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}
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// decimal
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self.frameVal = Math.round(self.frameVal*self.dec)/self.dec;
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// format and print value
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self.printValue(self.frameVal);
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// whether to continue
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if (progress < self.duration) {
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self.rAF = requestAnimationFrame(self.count);
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} else {
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if (self.callback) { self.callback(); }
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}
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};
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// start your animation
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self.start = function(callback) {
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self.callback = callback;
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self.rAF = requestAnimationFrame(self.count);
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return false;
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};
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// toggles pause/resume animation
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self.pauseResume = function() {
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if (!self.paused) {
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self.paused = true;
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cancelAnimationFrame(self.rAF);
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} else {
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self.paused = false;
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delete self.startTime;
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self.duration = self.remaining;
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self.startVal = self.frameVal;
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requestAnimationFrame(self.count);
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}
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};
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// reset to startVal so animation can be run again
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self.reset = function() {
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self.paused = false;
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delete self.startTime;
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self.startVal = startVal;
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cancelAnimationFrame(self.rAF);
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self.printValue(self.startVal);
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};
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// pass a new endVal and start animation
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self.update = function (newEndVal) {
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cancelAnimationFrame(self.rAF);
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self.paused = false;
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delete self.startTime;
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self.startVal = self.frameVal;
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self.endVal = Number(newEndVal);
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self.countDown = (self.startVal > self.endVal);
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self.rAF = requestAnimationFrame(self.count);
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};
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// format startVal on initialization
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self.printValue(self.startVal);
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};
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