如何在js中將sting日期轉換為普通日期格式-有解無憂

我正在使用 MongoDB 存盤資料，在檢索它們時，我想獲取日期并將其轉換為如下所示的內容：

'2022-07-20T10:12:21.054Z'

現在我的約會看起來像這樣：

"Nov. 13, 2022 at 5:51 AM "

因為我是通過 createdAt 鍵直接從 mongo 獲取它的。我怎樣才能做到這一點？

uj5u.com熱心網友回復：

> Try this using moment library you can make any format you want.
<!DOCTYPE html>
        <html lang="en">
        <head>
            <meta charset="UTF-8">
            <title>Title</title>
            <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.3/moment.min.js"></script>
        </head>
        <body>
        
        <button type="button" onclick="clickHandler()">
            Get Today!
        </button>
        <script>
            function clickHandler() {
                alert(moment('2022-07-20T10:12:21.054Z')
                    .format('MMM. , DD YYYY at h:mm:ss a'))
            }
        </script>
        </body>
    </html>

uj5u.com熱心網友回復：

const datetostring = (oldDate) => {
    // let oldDate = "Nov. 13, 2022 at 5:51 AM "
    // console.log(oldDate);
    let oldDateArr = oldDate.toString().split(" ");

    let month = oldDateArr[0].replace('.', '')

    if (month == "Jan") { month = "01" } else if (month == "Feb") { month = "02" } else if (month == "Mar") { month = "03" } else if (month == "Apr") { month = "04" } else if (month == "May") { month = "05" } else if (month == "Jun") { month = "06" } else if (month == "Jul") { month = "07" } else if (month == "Aug") { month = "08" } else if (month == "Sep") { month = "09" } else if (month == "Oct") { month = "10" } else if (month == "Nov") { month = "11" } else if (month == "Dec") { month = "12" } else { month = "12" }

    let join = `${oldDateArr[2]}-${month}-${oldDateArr[1].replace(',', '')}T${oldDateArr[4]}:00.054Z`

    return (join);
}

這完美地作業

uj5u.com熱心網友回復：

試試這個：（您可能需要定義您的時區才能做到這一點）

const dateStr = 'Nov. 13, 2022 at 5:51 AM'
const regex = /\.|,|\s|:/g
const dateArray = dateStr.split(regex);
const ampmTo24hr = (hh,mm,ampm) => (
  ampm === 'AM' ?
    `${hh}:${mm}:00` :
    `${parseInt(hh,10)   12}:${mm}:00`
  );

const [mmm,,dd,,yyyy,,hh,mm,ampm] = dateArray;
const time = ampmTo24hr(hh,mm,ampm);
  
console.log(`${yyyy}-${mmm}-${dd} ${time}`)
console.log(new Date(`${yyyy}-${mmm}-${dd} ${time}`))

看起來new Date(`${yyyy}-${mmm}-${dd} ${time}`)可能不支持這種格式，為月份格式匹配構建一個陣列或添加一個開關函式可能是一個選擇：

    const dateStr = 'Nov. 13, 2022 at 5:51 AM'
    const regex = /\.|,|\s|:/g
    const dateArray = dateStr.split(regex);
    const getMonth = (str) => {
      switch(str.toUpperCase()) {
        case 'JAN': return '01';
        case 'FEB': return '02';
        case 'MAR': return '03';
        case 'APL': return '04';
        case 'MAY': return '05';
        case 'JUN': return '06';
        case 'JUL': return '07';
        case 'AUG': return '08';
        case 'SEP': return '09';
        case 'OCT': return '10';
        case 'NOV': return '11';
        case 'DEC': return '12';
      }
    }
    const ampmTo24hr = (hh,mm,ampm) => (
      ampm === 'AM' ?
        `${hh}:${mm}:00` :
        `${parseInt(hh,10)   12}:${mm}:00`
      );

    const [mmm,,dd,,yyyy,,hh,mm,ampm] = dateArray;
    const time = ampmTo24hr(hh,mm,ampm);
      
    console.log(new Date(`${yyyy}-${getMonth(mmm)}-${dd} ${time}`))

轉載請註明出處，本文鏈接：https://www.uj5u.com/qita/532265.html

標籤：javascriptmongodb日期

上一篇：如何使用python從YouTube時間戳中獲取開始時間、結束時間（以秒為單位）？

下一篇：Python子字串正則運算式提取