Moment.js moment().isoWeekYear() 方法

moment().isoWeekYear() 方法 用于获取或设置 Moment 对象的 ISO 周年份。ISO 周编号系统在其系统中考虑了闰周。这使其只能有 52 或 53 个完整周。这是通过将天数视为 364 或 371 天而不是 365 或 366 天来实现的。这使得该方法无论地区如何返回相同的日期。

语法：

moment().isoWeekYear( Number );

参数： 此方法接受一个参数，如上所述并以下所述：

Number： 这是要设置为Moment对象的ISO周年份。它是一个可选参数。

返回值： 此方法返回Moment的当前ISO周。

注意： 这在普通Node.js程序中不起作用，因为它需要全局或项目目录中安装外部moment.js库。

Moment.js可以使用以下命令安装：

moment模块的安装：

npm install moment

下面的示例将演示 Moment.js 的 moment().isoWeekYear() 方法 。

示例1：

const moment = require('moment'); 
  
console.log("Current Date:", moment().toString()) 
console.log("Current isoWeekYear is:", moment().isoWeekYear()) 
  
let isoWeekYear1 = moment().isoWeekYear(1); 
console.log( 
    "Moment with isoWeekYear of 1 is:", 
    isoWeekYear1.toString() 
) 
  
let isoWeekYear2 = moment().isoWeekYear(2); 
console.log( 
    "Moment with isoWeekYear of 2 is:", 
    isoWeekYear2.toString() 
) 
  
let isoWeekYear2010 = moment().isoWeekYear(2010); 
console.log( 
    "Moment with isoWeekYear of 2010 is:", 
    isoWeekYear2010.toString() 
) 
  
let isoWeekYear2024 = moment().isoWeekYear(2024); 
console.log( 
    "Moment with isoWeekYear of 2024 is:", 
    isoWeekYear2024.toString() 
)

输出:

当前日期: Mon Jul 18 2022 01:04:05 GMT+0530
当前 isoWeekYear 是: 2022
isoWeekYear 为 1 的 Moment 是: Mon Jul 16 0001 01:04:05 GMT+0553
isoWeekYear 为 2 的 Moment 是: Mon Jul 15 0002 01:04:05 GMT+0553
isoWeekYear 为 2010 的 Moment 是: Mon Jul 19 2010 01:04:05 GMT+0530
isoWeekYear 为 2024 的 Moment 是: Mon Jul 15 2024 01:04:05 GMT+0530

示例2:

const moment = require('moment'); 
  
console.log("Current Date:", moment().toString()) 
console.log( 
    "Current isoWeekYear is:", 
    moment().isoWeekYear() 
) 
  
let isoWeekYearDecember = moment().isoWeekYear(-100); 
console.log( 
    "Moment with isoWeekYear of -100 is:", 
    isoWeekYearDecember.toString() 
) 
  
let isoWeekYearFeb = moment().isoWeekYear(-2020); 
console.log( 
    "Moment with isoWeekYear of -2020 is:", 
    isoWeekYearFeb.toString() 
)

输出：

Current Date:Mon Jul 18 2022 01:04:05 GMT+0530   
Current isoWeekYear is:2022   
Moment with isoWeekYear of -100 is:Mon Jul 16 -0100 01:04:05 GMT+0553   
Moment with isoWeekYear of -2020 is:Mon Jul 14 -2020 01:04:05 GMT+0553

参考： https://momentjs.com/docs/#/get-set/iso-week-year/