Javascript Date 笔记

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let nowDate = new Date();
console.log('1.1 从 date 初始化：', nowDate, moment(nowDate));

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let nowMoment = moment();
console.log('1.2 直接初始化：', nowMoment);

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const ISO8601_String = (new Date(1987, 8, 15 , 16, 15, 45)).toISOString();
console.log('1.3 从字符串初始化：', ISO8601_String, moment(ISO8601_String), new Date(Date.parse(ISO8601_String)))

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console.log('2.1 Format 格式化输出：', nowMoment.format())

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moment.defaultFormat = 'YYYY-MM-DD HH:mm:ss:SSSS'
console.log('2.2 Format 默认格式化输出：', nowMoment.format())

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console.log('2.3 Format 格式化输出：', nowMoment.utc().format())

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moment.defaultFormatUtc = 'YYYY-MM-DD HH:mm:ss:SSSS'
console.log('2.4 UTC Format 默认格式化输出：', nowMoment.utc().format())

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console.log('3.1 原生获取时间戳：', nowDate.getTime(), new Date(nowDate.getTime()))

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console.log('3.1 moment 获取时间戳：', nowMoment.unix(), moment.unix(nowMoment.unix()), moment(nowDate.getTime()))

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console.log('4.1 获取当前时区：', moment.tz.guess(), moment.utc())

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console.log('5.1 获取当天最后一刻', moment().endOf('day'))

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console.log('5.2 获取本周最后一刻', moment().endOf('week').startOf('day'))

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console.log('5.3 获取本月第一天', moment().startOf('month'))

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console.log('5.4 获取明年第一天', moment().year(moment().year() + 1).startOf('year'))

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const d1 = new Date(1987, 8, 15, 16, 15, 45)
const d2 = new Date(1987, 8, 15, 17, 13, 45)
console.log('6.1 原生时长差值（单位 ms）：', d2.getTime() - d1.getTime(), d1.getTime() - d2.getTime())

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console.log('6.3 moment 时长差值减：', duration.subtract(moment.duration(5, 'minute')).asMinutes())