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25 lines
649 B
25 lines
649 B
var staticDayTime = require('./staticDayTime')
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var staticStrFirst = require('./staticStrFirst')
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var helperGetYMDTime = require('./helperGetYMDTime')
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var getWhatYear = require('./getWhatYear')
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var toStringDate = require('./toStringDate')
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var isValidDate = require('./isValidDate')
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/**
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* 返回某个年份的第几天
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*
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* @param {Date} date 日期或数字
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* @return {Number}
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*/
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function getYearDay (date) {
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date = toStringDate(date)
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if (isValidDate(date)) {
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return Math.floor((helperGetYMDTime(date) - helperGetYMDTime(getWhatYear(date, 0, staticStrFirst))) / staticDayTime) + 1
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}
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return NaN
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}
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module.exports = getYearDay
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