CountUp.js实现数字滚动增值效果


Posted in Javascript onOctober 17, 2019

数据改动的时候,countUp.js进行数值滚动增加的动态效果,供大家参考,具体内容如下

这是js文件

// 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) {
 var self = this
 self.version = function () { return '1.9.3' }
 
 // default options
 self.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
 easingFn: easeOutExpo, // optional custom easing function, default is Robert Penner's easeOutExpo
 formattingFn: formatNumber, // optional custom formatting function, default is formatNumber above
 prefix: '', // optional text before the result
 suffix: '', // optional text after the result
 numerals: [] // optionally pass an array of custom numerals for 0-9
 }
 
 // extend default options with passed options object
 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 {
 // ensure the separator is a string (formatNumber assumes this)
 self.options.separator = '' + self.options.separator
 }
 
 // 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 tesult = currTime + timeToCall
 var id = window.setTimeout(function () { callback(tesult) }, timeToCall)
 lastTime = currTime + timeToCall
 return id
 }
 }
 if (!window.cancelAnimationFrame) {
 window.cancelAnimationFrame = function (id) {
 clearTimeout(id)
 }
 }
 
 function formatNumber (num) {
 var neg = (num < 0)
 var x, x1, x2, x3, i, len
 num = Math.abs(num).toFixed(self.decimals)
 num += ''
 x = num.split('.')
 x1 = x[0]
 x2 = x.length > 1 ? self.options.decimal + x[1] : ''
 if (self.options.useGrouping) {
 x3 = ''
 for (i = 0, len = x1.length; i < len; ++i) {
 if (i !== 0 && ((i % 3) === 0)) {
 x3 = self.options.separator + x3
 }
 x3 = x1[len - i - 1] + x3
 }
 x1 = x3
 }
 // optional numeral substitution
 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 (neg ? '-' : '') + self.options.prefix + x1 + x2 + self.options.suffix
 }
 // Robert Penner's easeOutExpo
 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)
 // error checks
 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
 }
 }
 
 // Print value to target
 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
 
 // to ease or not to ease
 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)
 }
 }
 
 // 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
 self.start = function (callback) {
 if (!self.initialize()) return
 self.callback = callback
 self.rAF = requestAnimationFrame(self.count)
 }
 // toggles pause/resume animation
 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)
 }
 }
 // reset to startVal so animation can be run again
 self.reset = function () {
 self.paused = false
 delete self.startTime
 self.initialized = false
 if (self.initialize()) {
 cancelAnimationFrame(self.rAF)
 self.printValue(self.startVal)
 }
 }
 // pass a new endVal and start animation
 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)
 }
 
 // format startVal on initialization
 if (self.initialize()) self.printValue(self.startVal)
}
module.exports = CountUp

index.html文件中需要进入该插件,和jq插件,再进行new实例化

var options = {
 useEasing: true, // 使用缓和效果
 useGrouping: true, // 使用分组效果
 separator: ',', // 分离器,数据够三位,例如100,000
 decimal: '.', // 小数点分割,例如:10.00
 prefix: '', // 第一位默认数字,例如:¥
 suffix: '' // 最后一位默认数字,例如:元,美元
 }
 // new CountUp(target, startVal, endVal, decimals, duration, options)
 // target = 目标元素的 ID
 // startVal = 开始值
 // endVal = 结束值
 // decimals = 小数位数 默认值是0
 // duration = 动画延迟秒数,默认值是2;
 // options = optional object of options (see below)
 
 var demo = new CountUp('extractionMoney', 0, data.balanceAmount, 2, 0.5, options)
 if (!demo.error) {
 demo.start()
 } else {
 console.error(demo.error)
 }

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持三水点靠木。

Javascript 相关文章推荐
Extjs列表详细信息窗口新建后自动加载解决方法
Apr 02 Javascript
js动态添加onload、onresize、onscroll事件(另类方法)
Dec 26 Javascript
原生javascript实现获取指定元素下所有后代元素的方法
Oct 28 Javascript
JQuery select(下拉框)操作方法汇总
Apr 15 Javascript
js的form表单提交url传参数(包含+等特殊字符)的两种解决方法
May 25 Javascript
详解JS几种变量交换方式以及性能分析对比
Nov 25 Javascript
Html5+jQuery+CSS制作相册小记录
Dec 30 Javascript
分分钟玩转Vue.js组件(二)
Mar 01 Javascript
AngularJS $http模块POST请求实现
Apr 08 Javascript
简单实现vue验证码60秒倒计时功能
Oct 11 Javascript
angularjs实现天气预报功能
Jun 16 Javascript
vue+element获取el-table某行的下标,根据下标操作数组对象方式
Aug 07 Javascript
countUp.js实现数字动态变化效果
Oct 17 #Javascript
jQuery/JS监听input输入框值变化实例
Oct 17 #jQuery
countup.js实现数字动态叠加效果
Oct 17 #Javascript
vue使用showdown并实现代码区域高亮的示例代码
Oct 17 #Javascript
vue-devtools的安装和使用步骤详解
Oct 17 #Javascript
express中static中间件的具体使用方法
Oct 17 #Javascript
在Express中提供静态文件的实现方法
Oct 17 #Javascript
You might like
我的群发邮件程序
2006/10/09 PHP
PHP的基本常识小结
2013/07/05 PHP
PHP+MySQL实现消息队列的方法分析
2018/05/09 PHP
PHP里的$_GET数组介绍
2019/03/22 PHP
删除重复数据的算法
2006/11/23 Javascript
javascript html 静态页面传参数
2009/04/10 Javascript
javascript 学习笔记(一)DOM基本操作
2011/04/08 Javascript
js定时器怎么写?就是在特定时间执行某段程序
2013/10/11 Javascript
javascript监听鼠标滚轮事件浅析
2014/06/05 Javascript
nodejs 实现模拟form表单上传文件
2014/07/14 NodeJs
jQuery中prepend()方法用法实例
2014/12/25 Javascript
Node.js编写组件的三种实现方式
2016/02/25 Javascript
Javascript实现前端简单的路由实例
2016/09/11 Javascript
原生js实现新闻列表展开/收起全文功能
2017/01/20 Javascript
微信小程序实现顶部选项卡(swiper)
2020/06/19 Javascript
浅析vue中常见循环遍历指令的使用 v-for
2018/04/18 Javascript
Vue.use源码学习小结
2018/06/20 Javascript
vue自动添加浏览器兼容前后缀操作
2020/08/13 Javascript
[04:32]DOTA2著名解说配音敌法师 现场专访海涛怒切假腿
2013/12/20 DOTA
[00:33]2016完美“圣”典风云人物:BurNIng宣传片
2016/12/10 DOTA
[59:44]2018DOTA2亚洲邀请赛 3.31 小组赛 B组 paiN vs iG
2018/03/31 DOTA
在 Python 应用中使用 MongoDB的方法
2017/01/05 Python
利用pandas向一个csv文件追加写入数据的实现示例
2020/04/23 Python
用CSS3实现瀑布流布局的示例代码
2017/11/10 HTML / CSS
size?德国官方网站:英国伦敦的球鞋精品店
2018/03/17 全球购物
用C语言实现文件读写操作
2013/10/27 面试题
Linux如何命名文件--使用文件名时应注意
2012/01/22 面试题
仓库管理制度
2014/01/21 职场文书
会务接待方案
2014/02/27 职场文书
可口可乐广告词
2014/03/20 职场文书
经典演讲稿开场白
2014/08/25 职场文书
大学感恩节活动策划方案
2014/10/11 职场文书
2015年生产部工作总结范文
2015/05/25 职场文书
学生会工作感言
2015/08/07 职场文书
WINDOWS 64位 下安装配置mysql8.0.25最详细的教程
2022/03/22 MySQL
JavaScript获取URL参数的方法分享
2022/04/07 Javascript