Moment.js moment().isoWeek()用法及代碼示例

moment().isoWeek()方法用於獲取或設置Moment對象的ISO周。 ISO week-numbering 係統在其係統中考慮閏周。這使得它隻有 52 或 53 整周。這是通過將天數考慮為 364 或 371 天而不是 365 或 366 天來實現的。這使得該方法返回相同的日期，無論其區域設置如何。

用法:

moment().isoWeek( Number );

參數：該方法接受如上所述和如下所述的單個參數：

Number:這是必須為 Moment 對象設置的 ISO 周。它是一個可選參數。

返回值：此方法返回當前 ISO 周的時刻。

注意：這在普通的 Node.js 程序中不起作用，因為它需要全局安裝或在項目目錄中安裝外部moment.js 庫。

Moment.js 可以使用以下命令安裝：

moment模塊的安裝：

npm install moment

以下示例將演示 Moment.js moment().isoWeek() 方法。

示例 1：

Javascript


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() 
)

輸出：

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：在此示例中，我們將看到 ISO 周不受 Moment 區域設置的影響，因此一周的所有日期都是相同的。

Javascript


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() 
)

輸出：

Moment with isoWeek of 1 with locale ‘en’ is: Wed Jan 05 2022 01:12:39 GMT+0530
Moment with isoWeek of 1 with locale ‘br’ is: Wed Jan 05 2022 01:12:39 GMT+0530
Moment with isoWeek of 52 with locale ‘in’ is: Wed Dec 28 2022 01:12:39 GMT+0530
Moment with isoWeek of 52 with locale ‘fr’ is: Wed Dec 28 2022 01:12:39 GMT+0530

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

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注：本文由純淨天空篩選整理自sayantanm19大神的英文原創作品 Moment.js moment().isoWeek() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。