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34 lines
1.1 KiB
34 lines
1.1 KiB
5 months ago
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var staticStrFirst = require('./staticStrFirst')
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var staticStrLast = require('./staticStrLast')
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var staticParseInt = require('./staticParseInt')
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var helperGetDateFullYear = require('./helperGetDateFullYear')
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var helperGetDateMonth = require('./helperGetDateMonth')
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var helperGetDateTime = require('./helperGetDateTime')
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var toStringDate = require('./toStringDate')
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var isValidDate = require('./isValidDate')
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/**
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* 返回前几天或后几天的日期
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*
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* @param {Date} date 日期或数字
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* @param {Number} offset 天(默认当天)、前几天、后几天
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* @param {String} mode 获取时分秒(null默认当前时分秒)、日初(first)、日末(last)
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* @return {Date}
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*/
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function getWhatDay (date, offset, mode) {
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date = toStringDate(date)
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if (isValidDate(date) && !isNaN(offset)) {
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date.setDate(date.getDate() + staticParseInt(offset))
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if (mode === staticStrFirst) {
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return new Date(helperGetDateFullYear(date), helperGetDateMonth(date), date.getDate())
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} else if (mode === staticStrLast) {
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return new Date(helperGetDateTime(getWhatDay(date, 1, staticStrFirst)) - 1)
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}
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}
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return date
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}
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module.exports = getWhatDay
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