249 lines
9.2 KiB
JavaScript
249 lines
9.2 KiB
JavaScript
var __assign = (this && this.__assign) || function () {
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__assign = Object.assign || function(t) {
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for (var s, i = 1, n = arguments.length; i < n; i++) {
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s = arguments[i];
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for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
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t[p] = s[p];
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}
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return t;
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};
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return __assign.apply(this, arguments);
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};
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// playground: stackblitz.com/edit/countup-typescript
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var CountUp = /** @class */ (function () {
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function CountUp(target, endVal, options) {
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var _this = this;
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this.target = target;
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this.endVal = endVal;
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this.options = options;
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this.version = '2.0.4';
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this.defaults = {
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startVal: 0,
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decimalPlaces: 0,
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duration: 2,
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useEasing: true,
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useGrouping: true,
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smartEasingThreshold: 999,
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smartEasingAmount: 333,
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separator: ',',
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decimal: '.',
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prefix: '',
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suffix: ''
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};
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this.finalEndVal = null; // for smart easing
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this.useEasing = true;
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this.countDown = false;
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this.error = '';
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this.startVal = 0;
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this.paused = true;
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this.count = function (timestamp) {
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if (!_this.startTime) {
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_this.startTime = timestamp;
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}
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var progress = timestamp - _this.startTime;
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_this.remaining = _this.duration - progress;
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// to ease or not to ease
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if (_this.useEasing) {
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if (_this.countDown) {
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_this.frameVal = _this.startVal - _this.easingFn(progress, 0, _this.startVal - _this.endVal, _this.duration);
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}
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else {
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_this.frameVal = _this.easingFn(progress, _this.startVal, _this.endVal - _this.startVal, _this.duration);
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}
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}
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else {
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if (_this.countDown) {
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_this.frameVal = _this.startVal - ((_this.startVal - _this.endVal) * (progress / _this.duration));
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}
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else {
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_this.frameVal = _this.startVal + (_this.endVal - _this.startVal) * (progress / _this.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 (_this.countDown) {
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_this.frameVal = (_this.frameVal < _this.endVal) ? _this.endVal : _this.frameVal;
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}
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else {
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_this.frameVal = (_this.frameVal > _this.endVal) ? _this.endVal : _this.frameVal;
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}
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// decimal
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_this.frameVal = Math.round(_this.frameVal * _this.decimalMult) / _this.decimalMult;
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// format and print value
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_this.printValue(_this.frameVal);
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// whether to continue
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if (progress < _this.duration) {
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_this.rAF = requestAnimationFrame(_this.count);
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}
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else if (_this.finalEndVal !== null) {
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// smart easing
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_this.update(_this.finalEndVal);
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}
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else {
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if (_this.callback) {
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_this.callback();
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}
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}
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};
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// default format and easing functions
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this.formatNumber = function (num) {
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var neg = (num < 0) ? '-' : '';
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var result, x, x1, x2, x3;
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result = Math.abs(num).toFixed(_this.options.decimalPlaces);
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result += '';
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x = result.split('.');
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x1 = x[0];
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x2 = x.length > 1 ? _this.options.decimal + x[1] : '';
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if (_this.options.useGrouping) {
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x3 = '';
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for (var i = 0, len = x1.length; i < len; ++i) {
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if (i !== 0 && (i % 3) === 0) {
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x3 = _this.options.separator + x3;
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}
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x3 = x1[len - i - 1] + x3;
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}
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x1 = x3;
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}
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// optional numeral substitution
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if (_this.options.numerals && _this.options.numerals.length) {
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x1 = x1.replace(/[0-9]/g, function (w) { return _this.options.numerals[+w]; });
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x2 = x2.replace(/[0-9]/g, function (w) { return _this.options.numerals[+w]; });
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}
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return neg + _this.options.prefix + x1 + x2 + _this.options.suffix;
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};
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this.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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this.options = __assign({}, this.defaults, options);
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this.formattingFn = (this.options.formattingFn) ?
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this.options.formattingFn : this.formatNumber;
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this.easingFn = (this.options.easingFn) ?
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this.options.easingFn : this.easeOutExpo;
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this.startVal = this.validateValue(this.options.startVal);
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this.frameVal = this.startVal;
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this.endVal = this.validateValue(endVal);
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this.options.decimalPlaces = Math.max(0 || this.options.decimalPlaces);
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this.decimalMult = Math.pow(10, this.options.decimalPlaces);
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this.resetDuration();
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this.options.separator = String(this.options.separator);
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this.useEasing = this.options.useEasing;
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if (this.options.separator === '') {
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this.options.useGrouping = false;
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}
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this.el = (typeof target === 'string') ? document.getElementById(target) : target;
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if (this.el) {
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this.printValue(this.startVal);
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}
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else {
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this.error = '[CountUp] target is null or undefined';
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}
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}
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// determines where easing starts and whether to count down or up
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CountUp.prototype.determineDirectionAndSmartEasing = function () {
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var end = (this.finalEndVal) ? this.finalEndVal : this.endVal;
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this.countDown = (this.startVal > end);
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var animateAmount = end - this.startVal;
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if (Math.abs(animateAmount) > this.options.smartEasingThreshold) {
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this.finalEndVal = end;
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var up = (this.countDown) ? 1 : -1;
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this.endVal = end + (up * this.options.smartEasingAmount);
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this.duration = this.duration / 2;
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}
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else {
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this.endVal = end;
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this.finalEndVal = null;
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}
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if (this.finalEndVal) {
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this.useEasing = false;
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}
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else {
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this.useEasing = this.options.useEasing;
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}
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};
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// start animation
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CountUp.prototype.start = function (callback) {
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if (this.error) {
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return;
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}
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this.callback = callback;
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if (this.duration > 0) {
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this.determineDirectionAndSmartEasing();
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this.paused = false;
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this.rAF = requestAnimationFrame(this.count);
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}
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else {
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this.printValue(this.endVal);
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}
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};
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// pause/resume animation
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CountUp.prototype.pauseResume = function () {
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if (!this.paused) {
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cancelAnimationFrame(this.rAF);
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}
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else {
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this.startTime = null;
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this.duration = this.remaining;
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this.startVal = this.frameVal;
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this.determineDirectionAndSmartEasing();
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this.rAF = requestAnimationFrame(this.count);
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}
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this.paused = !this.paused;
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};
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// reset to startVal so animation can be run again
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CountUp.prototype.reset = function () {
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cancelAnimationFrame(this.rAF);
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this.paused = true;
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this.resetDuration();
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this.startVal = this.validateValue(this.options.startVal);
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this.frameVal = this.startVal;
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this.printValue(this.startVal);
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};
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// pass a new endVal and start animation
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CountUp.prototype.update = function (newEndVal) {
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cancelAnimationFrame(this.rAF);
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this.startTime = null;
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this.endVal = this.validateValue(newEndVal);
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if (this.endVal === this.frameVal) {
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return;
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}
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this.startVal = this.frameVal;
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if (!this.finalEndVal) {
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this.resetDuration();
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}
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this.determineDirectionAndSmartEasing();
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this.rAF = requestAnimationFrame(this.count);
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};
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CountUp.prototype.printValue = function (val) {
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var result = this.formattingFn(val);
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if (this.el.tagName === 'INPUT') {
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var input = this.el;
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input.value = result;
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}
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else if (this.el.tagName === 'text' || this.el.tagName === 'tspan') {
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this.el.textContent = result;
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}
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else {
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this.el.innerHTML = result;
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}
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};
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CountUp.prototype.ensureNumber = function (n) {
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return (typeof n === 'number' && !isNaN(n));
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};
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CountUp.prototype.validateValue = function (value) {
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var newValue = Number(value);
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if (!this.ensureNumber(newValue)) {
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this.error = "[CountUp] invalid start or end value: " + value;
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return null;
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}
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else {
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return newValue;
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}
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};
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CountUp.prototype.resetDuration = function () {
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this.startTime = null;
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this.duration = Number(this.options.duration) * 1000;
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this.remaining = this.duration;
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};
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return CountUp;
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}());
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export { CountUp };
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