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PATH: home / letacommog / letaweb / scripts / libraries

/*
    countUp.js
    (c) 2014-2015 @inorganik
    Licensed under the MIT license.
*/

// 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)

var CountUp = function(target, startVal, endVal, decimals, duration, options) {

// 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', 'o'];
    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);
        };
    }

// default options
    this.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
    };
    // extend default options with passed options object
    for (var key in options) {
        if (options.hasOwnProperty(key)) {
            this.options[key] = options[key];
        }
    }
    if (this.options.separator === '') this.options.useGrouping = false;
    if (!this.options.prefix) this.options.prefix = '';
    if (!this.options.suffix) this.options.suffix = '';

this.d = (typeof target === 'string') ? document.getElementById(target) : target;
    this.startVal = Number(startVal);
    this.endVal = Number(endVal);
    this.countDown = (this.startVal > this.endVal);
    this.frameVal = this.startVal;
    this.decimals = Math.max(0, decimals || 0);
    this.dec = Math.pow(10, this.decimals);
    this.duration = Number(duration) * 1000 || 2000;
    var self = this;

this.version = function () { return '1.6.0'; };

// Print value to target
    this.printValue = function(value) {
        var result = (!isNaN(value)) ? self.formatNumber(value) : '--';
        if (self.d.tagName == 'INPUT') {
            this.d.value = result;
        }
        else if (self.d.tagName == 'text' || self.d.tagName == 'tspan') {
            this.d.textContent = result;
        }
        else {
            this.d.innerHTML = result;
        }
    };

// 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) 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) {
                self.frameVal = self.startVal - self.easeOutExpo(progress, 0, self.startVal - self.endVal, self.duration);
            } else {
                self.frameVal = self.easeOutExpo(progress, self.startVal, self.endVal - self.startVal, self.duration);
            }
        } else {
            if (self.countDown) {
                self.frameVal = self.startVal - ((self.startVal - self.endVal) * (progress / self.duration));
            } else {
                self.frameVal = self.startVal + (self.endVal - self.startVal) * (progress / self.duration);
            }
        }

// 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;
        }

// decimal
        self.frameVal = Math.round(self.frameVal*self.dec)/self.dec;

// format and print value
        self.printValue(self.frameVal);

// whether to continue
        if (progress < self.duration) {
            self.rAF = requestAnimationFrame(self.count);
        } else {
            if (self.callback) self.callback();
        }
    };
    // start your animation
    this.start = function(callback) {
        self.callback = callback;
        self.rAF = requestAnimationFrame(self.count);
        return false;
    };
    // toggles pause/resume animation
    this.pauseResume = function() {
        if (!self.paused) {
            self.paused = true;
            cancelAnimationFrame(self.rAF);
        } else {
            self.paused = false;
            delete self.startTime;
            self.duration = self.remaining;
            self.startVal = self.frameVal;
            requestAnimationFrame(self.count);
        }
    };
    // reset to startVal so animation can be run again
    this.reset = function() {
        self.paused = false;
        delete self.startTime;
        self.startVal = startVal;
        cancelAnimationFrame(self.rAF);
        self.printValue(self.startVal);
    };
    // pass a new endVal and start animation
    this.update = function (newEndVal) {
        cancelAnimationFrame(self.rAF);
        self.paused = false;
        delete self.startTime;
        self.startVal = self.frameVal;
        self.endVal = Number(newEndVal);
        self.countDown = (self.startVal > self.endVal);
        self.rAF = requestAnimationFrame(self.count);
    };
    this.formatNumber = function(nStr) {
        nStr = nStr.toFixed(self.decimals);
        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 self.options.prefix + x1 + x2 + self.options.suffix;
    };

// format startVal on initialization
    self.printValue(self.startVal);
};

// Example:
// var numAnim = new countUp("SomeElementYouWantToAnimate", 0, 99.99, 2, 2.5);
// numAnim.start();
// numAnim.update(135);
// with optional callback:
// numAnim.start(someMethodToCallOnComplete);

return CountUp;

}));

[+] ..
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[+] bootstrap
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