class Countdown {constructor(options = {}) {Object.assign(this, {options, })this.__init()}/*** 初始化*/__init() {this.page = getCurrentPages()[getCurrentPages().length - 1]this.setData = this.page.setData.bind(this.page)this.restart(this.options)}/*** 默認參數*/setDefaults() {return {date: `June 7, 2087 15:03:25`, refresh: 1000, offset: 0, onEnd() {}, render(date) {}, }}/*** 合并參數*/mergeOptions(options) {const defaultOptions = this.setDefaults()for (let i in defaultOptions) {if (defaultOptions.hasOwnProperty(i)) {this.options[i] = typeof options[i] !== `undefined` ? options[i] : defaultOptions[i]if (i === `date` && typeof this.options.date !== `object`) {this.options.date = new Date(this.options.date)}if (typeof this.options[i] === `function`) {this.options[i] = this.options[i].bind(this)}}}if (typeof this.options.date !== `object`) {this.options.date = new Date(this.options.date)}}/*** 計算日期差*/getDiffDate() {let diff = (this.options.date.getTime() - Date.now() + this.options.offset) / 1000let dateData = {years: 0,days: 0,hours: 0,min: 0,sec: 0,millisec: 0,}if (diff <= 0) {if (this.interval) {this.stop()this.options.onEnd()}return dateData}if (diff >= (365.25 * 86400)) {dateData.years = Math.floor(diff / (365.25 * 86400))diff -= dateData.years * 365.25 * 86400}if (diff >= 86400) {dateData.days = Math.floor(diff / 86400)diff -= dateData.days * 86400}if (diff >= 3600) {dateData.hours = Math.floor(diff / 3600)diff -= dateData.hours * 3600}if (diff >= 60) {dateData.min = Math.floor(diff / 60)diff -= dateData.min * 60}dateData.sec = Math.round(diff)dateData.millisec = diff % 1 * 1000return dateData}/*** 補零*/leadingZeros(num, length = 2) {num = String(num)if (num.length > length) return numreturn (Array(length + 1).join(`0`) + num).substr(-length)}/*** 更新組件*/update(newDate) {this.options.date = typeof newDate !== `object` ? new Date(newDate) : newDatethis.render()return this}/*** 停止倒計時*/stop() {if (this.interval) {clearInterval(this.interval)this.interval = !1}return this}/*** 渲染組件*/render() {this.options.render(this.getDiffDate())return this}/*** 啟動倒計時*/start() {if (this.interval) return !1this.render()if (this.options.refresh) {this.interval = setInterval(() => {this.render()}, this.options.refresh)}return this}/*** 更新offset*/updateOffset(offset) {this.options.offset = offsetreturn this}/*** 重啟倒計時*/restart(options = {}) {this.mergeOptions(options)this.interval = !1this.start()return this}}

<view class="weui-cell__ft"> <view class="weui-vcode-btn" bindtap="vcode">{{ c2 || '獲取驗證碼' }}</view></view>

import $wuxCountDown from 'countdown/countdown'export { $wuxCountDown, }import { $wuxCountDown } from '../../components/wux' vcode: function () { if (this.c2 && this.c2.interval) return !1 this.c2 = new $wuxCountDown({ date: +(new Date) + 60000, onEnd() { this.setData({  c2: '重新獲取驗證碼', }) }, render(date) { const sec = this.leadingZeros(date.sec, 2) + ' 秒后重發 ' date.sec !== 0 && this.setData({  c2: sec, }) }, }) }