Moment.js moment().isoWeek() 方法
moment().isoWeek() 方法用于获取或设置 Moment 对象的 ISO 周。ISO 周编号系统中考虑了闰周。这使得它只有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。这使得该方法无论使用的语言环境如何,都会返回相同的日期。
语法:
moment().isoWeek( Number );
参数: 此方法接受一个参数,如上所述并在下方描述:
- Number(数字): 这是要设置给 Moment 对象的 ISO 周数,它是一个可选参数。
返回值: 此方法返回 Moment 的当前 ISO 周数。
注意: 这在普通的 Node.js 程序中不起作用,因为它需要在全局或项目目录中安装外部的 moment.js 库。
可以使用以下命令来安装 Moment.js:
安装 moment 模块:
npm install moment
下面的示例将演示 Moment.js moment().isoWeek() 方法 。
示例1:
const moment = require('moment');
console.log("Current Date:", moment().toString())
console.log("Current isoWeek is:", moment().isoWeek())
let isoWeek1 = moment().isoWeek(1);
console.log(
"Moment with isoWeek of 1 is:",
isoWeek1.toString()
)
let isoWeek40 = moment().isoWeek(40);
console.log(
"Moment with isoWeek of 40 is:",
isoWeek40.toString()
)
输出:
Current Date: Wed Jul 13 2022 01:12:39 GMT+0530
Current isoWeek is: 28
Moment with isoWeek of 1 is: Wed Jan 05 2022 01:12:39 GMT+0530
Moment with isoWeek of 40 is: Wed Oct 05 2022 01:12:39 GMT+0530
示例2: 在这个示例中,我们将看到ISO周对Moment的语言环境没有影响,因此一周内所有的日期都是相同的。
const moment = require('moment');
let isoWeek1en = moment().locale('en').isoWeek(1);
console.log(
"Moment with isoWeek of 1 with locale 'en' is:",
isoWeek1en.toString()
)
let isoWeek1br = moment().locale('br').isoWeek(1);
console.log(
"Moment with isoWeek of 1 with locale 'br' is:",
isoWeek1br.toString()
)
let isoWeek1in = moment().locale('in').isoWeek(52);
console.log(
"Moment with isoWeek of 52 with locale 'in' is:",
isoWeek1in.toString()
)
let isoWeek1fr = moment().locale('fr').isoWeek(52);
console.log(
"Moment with isoWeek of 52 with locale 'fr' is:",
isoWeek1fr.toString()
)
输出:
使用“en”语言环境的isoWeek为1的Moment对象是:Wed Jan 05 2022 01:12:39 GMT+0530
使用“br”语言环境的isoWeek为1的Moment对象是:Wed Jan 05 2022 01:12:39 GMT+0530
使用“in”语言环境的isoWeek为52的Moment对象是:Wed Dec 28 2022 01:12:39 GMT+0530
使用“fr”语言环境的isoWeek为52的Moment对象是:Wed Dec 28 2022 01:12:39 GMT+0530
参考: https://momentjs.com/docs/#/get-set/iso-week/