275 lines
10 KiB
JavaScript
275 lines
10 KiB
JavaScript
/**
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* 这是一个数字步进器的工具
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**/
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layui.define(['jquery'], function (exports) {
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var $ = layui.jquery;
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var CountUp = function (argums, startNum, endNum) {
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/**
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* 用法1.当argums是JSON对象
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* 方法的startNum,endNum这两个参数无效
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* eg: var Count = new CountUp({target:$(".box")});
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* Count.start();
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* argums{
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target ： 目标元素
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startVal ： 你想要开始的值，默认值为0
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endVal ： 你想要到达的值，默认值为元素的值
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decimals ： 小数位数，默认值为0
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duration ： 动画持续时间为秒，默认值为2
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options ：选项的可选对象
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* }
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* 用法2.当argums为字符串或者为jq元素（推荐是JQ元素哦,也可以是dom元素）
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* eg: var box = new CountUp(".box");
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* box.start();//开始执行
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* 为字符串一定是个元素的JQ选择器
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* startNum：默认值0
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* endNum：默认值为元素的值
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*/
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if ((typeof argums == "string") || (argums instanceof $) || (argums instanceof HTMLElement)) {
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var temp = argums;
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startNum = startNum || 0;
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endNum = endNum || $($(argums.target)[0]).text();
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argums = {
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target: $(argums)[0],
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startVal: startNum,
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endVal: endNum,
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}
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}
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argums.startVal = argums.startVal || 0;
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argums.target = $(argums.target)[0];
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argums.endVal = argums.endVal || $($(argums.target)[0]).text();
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/*var {
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target,
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startVal,
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endVal,
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decimals,
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duration,
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options
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} = argums;// 这里是ES6语法*/
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var target = argums.target,
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startVal = argums.startVal,
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endVal = argums.endVal,
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decimals = argums.decimals,
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duration = argums.duration,
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options = argums.options;
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var self = this;
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self.version = function () {
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return "1.9.2"
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};
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self.options = {
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useEasing: true,
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useGrouping: true,
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separator: ",",
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decimal: ".",
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easingFn: easeOutExpo,
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formattingFn: formatNumber,
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prefix: "",
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suffix: "",
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numerals: []
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};
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if (options && typeof options === "object") {
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for (var key in self.options) {
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if (options.hasOwnProperty(key) && options[key] !== null) {
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self.options[key] = options[key]
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}
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}
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}
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if (self.options.separator === "") {
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self.options.useGrouping = false
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} else {
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self.options.separator = "" + self.options.separator
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}
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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 = window[vendors[x] + "CancelAnimationFrame"] || window[vendors[x] +
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"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 () {
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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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function formatNumber(num) {
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num = num.toFixed(self.decimals);
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num += "";
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var x, x1, x2, x3, i, l;
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x = num.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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if (self.options.useGrouping) {
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x3 = "";
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for (i = 0, l = x1.length; i < l; ++i) {
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if (i !== 0 && ((i % 3) === 0)) {
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x3 = self.options.separator + x3
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}
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x3 = x1[l - i - 1] + x3
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}
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x1 = x3
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}
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if (self.options.numerals.length) {
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x1 = x1.replace(/[0-9]/g, function (w) {
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return self.options.numerals[+w]
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});
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x2 = x2.replace(/[0-9]/g, function (w) {
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return self.options.numerals[+w]
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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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function easeOutExpo(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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function ensureNumber(n) {
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return (typeof n === "number" && !isNaN(n))
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}
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self.initialize = function () {
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if (self.initialized) {
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return true
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}
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self.error = "";
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// self.d = (typeof target === "string") ? document.getElementById(target) : target;
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self.d = target;
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if (!self.d) {
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self.error = "[CountUp] target is null or undefined";
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return false
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}
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self.startVal = Number(startVal);
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self.endVal = Number(endVal);
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if (ensureNumber(self.startVal) && ensureNumber(self.endVal)) {
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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.countDown = (self.startVal > self.endVal);
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self.frameVal = self.startVal;
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self.initialized = true;
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return true
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} else {
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self.error = "[CountUp] startVal (" + startVal + ") or endVal (" + endVal + ") is not a number";
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return false
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}
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};
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self.printValue = function (value) {
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var result = self.options.formattingFn(value);
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if (self.d.tagName === "INPUT") {
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this.d.value = result
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} else {
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if (self.d.tagName === "text" || self.d.tagName === "tspan") {
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this.d.textContent = result
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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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};
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self.count = function (timestamp) {
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if (!self.startTime) {
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self.startTime = timestamp
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}
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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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if (self.options.useEasing) {
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if (self.countDown) {
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self.frameVal = self.startVal - self.options.easingFn(progress, 0, self.startVal - self.endVal,
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self.duration)
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} else {
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self.frameVal = self.options.easingFn(progress, self.startVal, self.endVal - self.startVal,
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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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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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self.frameVal = Math.round(self.frameVal * self.dec) / self.dec;
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self.printValue(self.frameVal);
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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) {
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self.callback()
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}
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}
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};
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self.start = function (callback) {
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if (!self.initialize()) {
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return
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}
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self.callback = callback;
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self.rAF = requestAnimationFrame(self.count)
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};
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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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self.reset = function () {
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self.paused = false;
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delete self.startTime;
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self.initialized = false;
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if (self.initialize()) {
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cancelAnimationFrame(self.rAF);
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self.printValue(self.startVal)
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}
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};
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self.update = function (newEndVal) {
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if (!self.initialize()) {
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return
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}
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newEndVal = Number(newEndVal);
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if (!ensureNumber(newEndVal)) {
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self.error = "[CountUp] update() - new endVal is not a number: " + newEndVal;
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return
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}
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self.error = "";
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if (newEndVal === self.frameVal) {
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return
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}
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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 = 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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if (self.initialize()) {
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self.printValue(self.startVal)
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}
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};
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exports('okCountUp', CountUp);
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});
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