<template> 
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    <view class="uni-countdown"> 
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        <text v-if="showDay" :style="[timeStyle]" class="uni-countdown__number">{{ d }}</text> 
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        <text v-if="showDay" :style="[splitorStyle]" class="uni-countdown__splitor">{{dayText}}</text> 
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        <!-- <text :style="[timeStyle]" class="uni-countdown__number">{{ h }}</text> 
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        <text :style="[splitorStyle]" class="uni-countdown__splitor">{{ showColon ? ':' : hourText }}</text> --> 
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        <text :style="[timeStyle]" class="uni-countdown__number">{{ i }}</text> 
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        <text :style="[splitorStyle]" class="uni-countdown__splitor">{{ showColon ? ':' : minuteText }}</text> 
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        <text :style="[timeStyle]" class="uni-countdown__number">{{ s }}</text> 
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        <text v-if="!showColon" :style="[splitorStyle]" class="uni-countdown__splitor">{{secondText}}</text> 
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    </view> 
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</template> 
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<script> 
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    import { 
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        initVueI18n 
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    } from '@dcloudio/uni-i18n' 
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    import messages from './i18n/index.js' 
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    const { 
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        t 
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    } = initVueI18n(messages) 
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    /** 
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     * Countdown 倒计时 
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     * @description 倒计时组件 
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     * @tutorial https://ext.dcloud.net.cn/plugin?id=25 
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     * @property {String} backgroundColor 背景色 
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     * @property {String} color 文字颜色 
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     * @property {Number} day 天数 
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     * @property {Number} hour 小时 
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     * @property {Number} minute 分钟 
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     * @property {Number} second 秒 
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     * @property {Number} timestamp 时间戳 
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     * @property {Boolean} showDay = [true|false] 是否显示天数 
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     * @property {Boolean} show-colon = [true|false] 是否以冒号为分隔符 
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     * @property {String} splitorColor 分割符号颜色 
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     * @event {Function} timeup 倒计时时间到触发事件 
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     * @example <uni-countdown :day="1" :hour="1" :minute="12" :second="40"></uni-countdown> 
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     */ 
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    export default { 
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        name: 'UniCountdown', 
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        emits: ['timeup'], 
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        props: { 
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            showDay: { 
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                type: Boolean, 
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                default: true 
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            }, 
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            showColon: { 
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                type: Boolean, 
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                default: true 
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            }, 
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            start: { 
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                type: Boolean, 
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                default: true 
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            }, 
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            backgroundColor: { 
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                type: String, 
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                default: '' 
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            }, 
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            color: { 
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                type: String, 
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                default: '#333' 
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            }, 
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            fontSize: { 
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                type: Number, 
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                default: 14 
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            }, 
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            splitorColor: { 
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                type: String, 
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                default: '#333' 
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            }, 
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            day: { 
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                type: Number, 
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                default: 0 
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            }, 
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            hour: { 
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                type: Number, 
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                default: 0 
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            }, 
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            minute: { 
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                type: Number, 
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                default: 0 
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            }, 
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            second: { 
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                type: Number, 
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                default: 0 
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            }, 
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            timestamp: { 
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                type: Number, 
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                default: 0 
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            } 
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        }, 
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        data() { 
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            return { 
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                timer: null, 
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                syncFlag: false, 
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                d: '00', 
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                h: '00', 
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                i: '00', 
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                s: '00', 
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                leftTime: 0, 
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                seconds: 0 
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            } 
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        }, 
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        computed: { 
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            dayText() { 
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                return t("uni-countdown.day") 
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            }, 
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            hourText(val) { 
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                return t("uni-countdown.h") 
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            }, 
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            minuteText(val) { 
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                return t("uni-countdown.m") 
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            }, 
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            secondText(val) { 
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                return t("uni-countdown.s") 
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            }, 
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            timeStyle() { 
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                const { 
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                    color, 
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                    backgroundColor, 
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                    fontSize 
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                } = this 
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                return { 
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                    color, 
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                    backgroundColor, 
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                    fontSize: `${fontSize}px`, 
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                    width: `${fontSize * 22 / 14}px`, // 按字体大小为 14px 时的比例缩放 
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                     lineHeight: `${fontSize * 20 / 14}px`, 
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                    borderRadius: `${fontSize * 3 / 14}px`, 
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                } 
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            }, 
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            splitorStyle() { 
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                const { splitorColor, fontSize, backgroundColor } = this 
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                return { 
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                    color: splitorColor, 
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                    fontSize: `${fontSize * 12 / 14}px`, 
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                    margin: backgroundColor ? `${fontSize * 4 / 14}px` : '' 
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                } 
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            } 
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        }, 
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        watch: { 
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            day(val) { 
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                this.changeFlag() 
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            }, 
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            hour(val) { 
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                this.changeFlag() 
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            }, 
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            minute(val) { 
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                this.changeFlag() 
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            }, 
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            second(val) { 
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                this.changeFlag() 
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            }, 
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            start: { 
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                immediate: true, 
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                handler(newVal, oldVal) { 
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                    if (newVal) { 
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                        this.startData(); 
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                    } else { 
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                        if (!oldVal) return 
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                        clearInterval(this.timer) 
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                    } 
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                } 
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            } 
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        }, 
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        created: function(e) { 
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            this.seconds = this.toSeconds(this.timestamp, this.day, this.hour, this.minute, this.second) 
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            this.countDown() 
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        }, 
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        // #ifndef VUE3 
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        destroyed() { 
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            clearInterval(this.timer) 
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        }, 
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        // #endif 
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        // #ifdef VUE3 
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        unmounted() { 
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            clearInterval(this.timer) 
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        }, 
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        // #endif 
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        methods: { 
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            toSeconds(timestamp, day, hours, minutes, seconds) { 
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                if (timestamp) { 
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                    return timestamp - parseInt(new Date().getTime() / 1000, 10) 
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                } 
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                return day * 60 * 60 * 24 + hours * 60 * 60 + minutes * 60 + seconds 
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            }, 
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            timeUp() { 
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                clearInterval(this.timer) 
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                this.$emit('timeup') 
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            }, 
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            countDown() { 
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                let seconds = this.seconds 
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                let [day, hour, minute, second] = [0, 0, 0, 0] 
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                if (seconds > 0) { 
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                    day = Math.floor(seconds / (60 * 60 * 24)) 
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                    hour = Math.floor(seconds / (60 * 60)) - (day * 24) 
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                    minute = Math.floor(seconds / 60) - (day * 24 * 60) - (hour * 60) 
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                    second = Math.floor(seconds) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60) 
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                } else { 
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                    this.timeUp() 
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                } 
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                if (day < 10) { 
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                    day = '0' + day 
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                } 
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                if (hour < 10) { 
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                    hour = '0' + hour 
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                } 
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                if (minute < 10) { 
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                    minute = '0' + minute 
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                } 
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                if (second < 10) { 
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                    second = '0' + second 
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                } 
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                this.d = day 
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                this.h = hour 
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                this.i = minute 
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                this.s = second 
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            }, 
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            startData() { 
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                this.seconds = this.toSeconds(this.timestamp, this.day, this.hour, this.minute, this.second) 
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                if (this.seconds <= 0) { 
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                    this.seconds = this.toSeconds(0, 0, 0, 0, 0) 
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                    this.countDown() 
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                    return 
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                } 
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                clearInterval(this.timer) 
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                this.countDown() 
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                this.timer = setInterval(() => { 
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                    this.seconds-- 
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                    if (this.seconds < 0) { 
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                        this.timeUp() 
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                        return 
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                    } 
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                    this.countDown() 
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                }, 1000) 
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            }, 
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            update(){ 
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                this.startData(); 
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            }, 
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            changeFlag() { 
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                if (!this.syncFlag) { 
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                    this.seconds = this.toSeconds(this.timestamp, this.day, this.hour, this.minute, this.second) 
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                    this.startData(); 
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                    this.syncFlag = true; 
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                } 
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            } 
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        } 
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    } 
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</script> 
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<style scoped> 
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    .uni-countdown__number { 
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        font-size: 27.5rpx !important; 
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        line-height: 26rpx !important; 
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    } 
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    .uni-countdown__splitor { 
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        font-size: 27.5rpx !important; 
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        line-height: 26rpx !important; 
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    } 
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</style> 
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<style lang="scss" scoped> 
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    $font-size: 14px; 
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    .uni-countdown { 
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        display: flex; 
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        flex-direction: row; 
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        justify-content: flex-start; 
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        align-items: center; 
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        &__splitor { 
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            margin: 0 2px; 
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            font-size: $font-size; 
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            color: #333; 
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        } 
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        &__number { 
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            border-radius: 3px; 
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            text-align: center; 
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            font-size: $font-size; 
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        } 
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    } 
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</style> 
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