var CountUp = function (target, startVal, endVal, decimals, duration, options) {
  var self = this;
  self.version = function () {
    return "1.9.2";
  };
  self.options = {
    useEasing: true,
    useGrouping: true,
    separator: ",",
    decimal: ".",
    easingFn: easeOutExpo,
    formattingFn: formatNumber,
    prefix: "",
    suffix: "",
    numerals: [],
  };
  if (options && typeof options === "object") {
    for (var key in self.options) {
      if (options.hasOwnProperty(key) && options[key] !== null) {
        self.options[key] = options[key];
      }
    }
  }
  if (self.options.separator === "") {
    self.options.useGrouping = false;
  } else {
    self.options.separator = "" + self.options.separator;
  }
  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);
    };
  }
  function formatNumber(num) {
    num = num.toFixed(self.decimals);
    num += "";
    var x, x1, x2, x3, i, l;
    x = num.split(".");
    x1 = x[0];
    x2 = x.length > 1 ? self.options.decimal + x[1] : "";
    if (self.options.useGrouping) {
      x3 = "";
      for (i = 0, l = x1.length; i < l; ++i) {
        if (i !== 0 && i % 3 === 0) {
          x3 = self.options.separator + x3;
        }
        x3 = x1[l - i - 1] + x3;
      }
      x1 = x3;
    }
    if (self.options.numerals.length) {
      x1 = x1.replace(/[0-9]/g, function (w) {
        return self.options.numerals[+w];
      });
      x2 = x2.replace(/[0-9]/g, function (w) {
        return self.options.numerals[+w];
      });
    }
    return self.options.prefix + x1 + x2 + self.options.suffix;
  }
  function easeOutExpo(t, b, c, d) {
    return (c * (-Math.pow(2, (-10 * t) / d) + 1) * 1024) / 1023 + b;
  }
  function ensureNumber(n) {
    return typeof n === "number" && !isNaN(n);
  }
  self.initialize = function () {
    if (self.initialized) {
      return true;
    }
    self.error = "";
    self.d =
      typeof target === "string" ? document.getElementById(target) : target;
    if (!self.d) {
      self.error = "[CountUp] target is null or undefined";
      return false;
    }
    self.startVal = Number(startVal);
    self.endVal = Number(endVal);
    if (ensureNumber(self.startVal) && ensureNumber(self.endVal)) {
      self.decimals = Math.max(0, decimals || 0);
      self.dec = Math.pow(10, self.decimals);
      self.duration = Number(duration) * 1000 || 2000;
      self.countDown = self.startVal > self.endVal;
      self.frameVal = self.startVal;
      self.initialized = true;
      return true;
    } else {
      self.error =
        "[CountUp] startVal (" +
        startVal +
        ") or endVal (" +
        endVal +
        ") is not a number";
      return false;
    }
  };
  self.printValue = function (value) {
    var result = self.options.formattingFn(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;
      }
    }
  };
  self.count = function (timestamp) {
    if (!self.startTime) {
      self.startTime = timestamp;
    }
    self.timestamp = timestamp;
    var progress = timestamp - self.startTime;
    self.remaining = self.duration - progress;
    if (self.options.useEasing) {
      if (self.countDown) {
        self.frameVal =
          self.startVal -
          self.options.easingFn(
            progress,
            0,
            self.startVal - self.endVal,
            self.duration
          );
      } else {
        self.frameVal = self.options.easingFn(
          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);
      }
    }
    if (self.countDown) {
      self.frameVal = self.frameVal < self.endVal ? self.endVal : self.frameVal;
    } else {
      self.frameVal = self.frameVal > self.endVal ? self.endVal : self.frameVal;
    }
    self.frameVal = Math.round(self.frameVal * self.dec) / self.dec;
    self.printValue(self.frameVal);
    if (progress < self.duration) {
      self.rAF = requestAnimationFrame(self.count);
    } else {
      if (self.callback) {
        self.callback();
      }
    }
  };
  self.start = function (callback) {
    if (!self.initialize()) {
      return;
    }
    self.callback = callback;
    self.rAF = requestAnimationFrame(self.count);
  };
  self.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);
    }
  };
  self.reset = function () {
    self.paused = false;
    delete self.startTime;
    self.initialized = false;
    if (self.initialize()) {
      cancelAnimationFrame(self.rAF);
      self.printValue(self.startVal);
    }
  };
  self.update = function (newEndVal) {
    if (!self.initialize()) {
      return;
    }
    newEndVal = Number(newEndVal);
    if (!ensureNumber(newEndVal)) {
      self.error =
        "[CountUp] update() - new endVal is not a number: " + newEndVal;
      return;
    }
    self.error = "";
    if (newEndVal === self.frameVal) {
      return;
    }
    cancelAnimationFrame(self.rAF);
    self.paused = false;
    delete self.startTime;
    self.startVal = self.frameVal;
    self.endVal = newEndVal;
    self.countDown = self.startVal > self.endVal;
    self.rAF = requestAnimationFrame(self.count);
  };
  if (self.initialize()) {
    self.printValue(self.startVal);
  }
};