IsoWeeksInYear

IsoWeeksInYear 添加了 .isoWeeksInYear() API 以返回 number，以根据 ISO 周获取一年中的周数。

This requires the IsLeapYear plugin to work 

var isoWeeksInYear = require('dayjs/plugin/isoWeeksInYear')
var isLeapYear = require('dayjs/plugin/isLeapYear') // dependent on isLeapYear plugin
dayjs.extend(isoWeeksInYear)
dayjs.extend(isLeapYear)

dayjs('2004-01-01').isoWeeksInYear() // 53
dayjs('2005-01-01').isoWeeksInYear() // 52
← IsoWeekLocaleData →