Moment.js moment.duration().weeks() 方法
moment().duration().weeks() 方法用于获取持续时间的周数。这个周数是根据天数计算出来的,因此其值在 0和4之间 。用于计算每周的天数是7天。
这个方法与 asWeeks() 方法 不同,后者返回给定持续时间的周数长度。
语法:
moment().duration().weeks();
参数: 该方法不接受任何参数。
返回值: 该方法返回持续时间的周数(0-4)。
注意: 在普通的Node.js程序中,这不起作用,因为它需要全局或项目目录中安装外部的moment.js库。
可以使用以下命令安装Moment.js库:
安装moment模块:
npm install moment
以下示例将演示 Moment.js moment.duration().weeks() 方法。
示例1:
const moment = require('moment');
let durationOne = moment.duration(3, 'weeks');
let durationTwo = moment.duration(6, 'weeks');
// This returns 3 as it would be the 3rd week
// in the first month of the duration
console.log(
"durationOne Weeks is:", durationOne.weeks()
)
// This returns 1 as it would be the 1st week
// in the second month of the duration
console.log(
"durationTwo Weeks is:", durationTwo.weeks()
)
输出:
durationOne Weeks is: 3
durationTwo Weeks is: 1
示例2: 这个示例将帮助理解这种方法与asWeeks()的区别,以便更好地理解。
const moment = require('moment');
let durationA = moment.duration(30, 'days');
let durationB = moment.duration(38, 'days');
// The asWeeks() method will return a value
// of the actual number of weeks of the duration
console.log(
"Length of durationA in weeks is:",
durationA.asWeeks()
)
// The weeks() method will return
// the week of the duration
// It can be denoted as floor(numberOfWeeks % 4)
console.log(
"durationA Weeks is:", durationA.weeks()
)
console.log(
"Length of durationB in weeks is:",
durationB.asWeeks()
)
console.log(
"durationB Weeks is:", durationB.weeks()
)
结果:
Length of durationA in weeks is: 4.285714285714286
durationA Weeks is: 4
Length of durationB in weeks is: 5.428571428571429
durationB Weeks is: 1
参考: https://momentjs.com/docs/#/durations/weeks/