@Adorojan的回答几乎是正确的。但是添加偏移量是不正确的，因为如果浏览器日期在GMT之前，偏移量值将为负，反之亦然。 下面是我的解决方案，对我来说是完美的:

// Input time in UTC var inputInUtc = "6/29/2011 4:52:48"; var dateInUtc = new Date(Date.parse(inputInUtc+" UTC")); //Print date in UTC time document.write("Date in UTC : " + dateInUtc.toISOString()+"<br>"); var dateInLocalTz = convertUtcToLocalTz(dateInUtc); //Print date in local time document.write("Date in Local : " + dateInLocalTz.toISOString()); function convertUtcToLocalTz(dateInUtc) { //Convert to local timezone return new Date(dateInUtc.getTime() - dateInUtc.getTimezoneOffset()*60*1000); }

@Adorojan的回答几乎是正确的。但是添加偏移量是不正确的，因为如果浏览器日期在GMT之前，偏移量值将为负，反之亦然。 下面是我的解决方案，对我来说是完美的:

// Input time in UTC var inputInUtc = "6/29/2011 4:52:48"; var dateInUtc = new Date(Date.parse(inputInUtc+" UTC")); //Print date in UTC time document.write("Date in UTC : " + dateInUtc.toISOString()+"<br>"); var dateInLocalTz = convertUtcToLocalTz(dateInUtc); //Print date in local time document.write("Date in Local : " + dateInLocalTz.toISOString()); function convertUtcToLocalTz(dateInUtc) { //Convert to local timezone return new Date(dateInUtc.getTime() - dateInUtc.getTimezoneOffset()*60*1000); }

Matt的回答忽略了一个事实，即Date()和它需要转换的日期时间之间的夏令时可能不同-这是我的解决方案:

    function ConvertUTCTimeToLocalTime(UTCDateString)
    {
        var convertdLocalTime = new Date(UTCDateString);

        var hourOffset = convertdLocalTime.getTimezoneOffset() / 60;

        convertdLocalTime.setHours( convertdLocalTime.getHours() + hourOffset ); 

        return convertdLocalTime;
    }

调试器中的结果:

UTCDateString: "2014-02-26T00:00:00"
convertdLocalTime: Wed Feb 26 2014 00:00:00 GMT-0800 (Pacific Standard Time)

对我来说，这很有效

if (typeof date === "number") {
  time = new Date(date).toLocaleString();
  } else if (typeof date === "string"){
  time = new Date(`${date} UTC`).toLocaleString();
}

在我的例子中，我必须在几秒钟内找出日期的差异。日期是UTC日期字符串，因此我将其转换为本地日期对象。这就是我所做的:

let utc1 = new Date();
let utc2 = null;
const dateForCompare = new Date(valueFromServer);
dateForCompare.setTime(dateForCompare.getTime() - dateForCompare.getTimezoneOffset() * 
 60000);
utc2 = dateForCompare;

const seconds = Math.floor(utc1 - utc2) / 1000;

我创建了一个函数，将所有时区转换为本地时间。

我没有使用getTimezoneOffset()，因为它没有返回适当的偏移值

要求:

1. npm i moment-timezone

function utcToLocal(utcdateTime, tz) {
    var zone = moment.tz(tz).format("Z") // Actual zone value e:g +5:30
    var zoneValue = zone.replace(/[^0-9: ]/g, "") // Zone value without + - chars
    var operator = zone && zone.split("") && zone.split("")[0] === "-" ? "-" : "+" // operator for addition subtraction
    var localDateTime
    var hours = zoneValue.split(":")[0]
    var minutes = zoneValue.split(":")[1]
    if (operator === "-") {
        localDateTime = moment(utcdateTime).subtract(hours, "hours").subtract(minutes, "minutes").format("YYYY-MM-DD HH:mm:ss")
    } else if (operator) {
        localDateTime = moment(utcdateTime).add(hours, "hours").add(minutes, "minutes").format("YYYY-MM-DD HH:mm:ss")
    } else {
        localDateTime = "Invalid Timezone Operator"
    }
    return localDateTime
}

utcToLocal("2019-11-14 07:15:37", "Asia/Kolkata")

//Returns "2019-11-14 12:45:37"