從星期日開始工作日 - javascript

Question

我想通過提供特定周的天數來檢索日期

例如

當我說

day: 1

它應該為我提供：

2023-01-15

到目前為止我嘗試過的是：

 function calculatedDate (day){ let date = new Date(); let dayAtDate = date.getDay(); let dayDiff = day - dayAtDate; if(dayDiff < 0){ dayDiff = 7 + dayDiff; } let desiredDate = date.setDate(date.getDate() + dayDiff); return new Date(desiredDate); } console.log(calculatedDate(1));

現在上面代碼的問題是它認為day: 1是星期一，但我希望day: 1在這里是星期日。

任何人都可以在這里以最好的方式幫助我嗎？

Answer 1

周日為 0，周一為 1：

 function calculatedDate (day) { let date = new Date(); let dayAtDate = date.getDay(); let dayDiff = day - (dayAtDate + 1); // change here if (dayDiff < 0) { dayDiff = 7 + dayDiff; } let desiredDate = date.setDate(date.getDate() + dayDiff); return new Date(desiredDate); } console.log(calculatedDate(1));

Answer 2

在提供的那一天只 -1 怎么樣？ 那應該解決它：

 function calculatedDate (day){ let date = new Date(); let dayAtDate = date.getDay(); day = day - 1; let dayDiff = day - dayAtDate; if(dayDiff < 0){ dayDiff = 7 + dayDiff; } let desiredDate = date.setDate(date.getDate() + dayDiff); return new Date(desiredDate); } console.log(calculatedDate(1));

您可能希望在輸入參數day上添加一些驗證，確保它是一個數字且大於或等於 1。

Answer 3

當前日期將為 0，通過進行以下更改來說明這一點。

if(dayDiff < 0){
    dayDiff = 6 + dayDiff;
}