Javascript：.to().utcOffset()似乎不能在Parse上使用矩()

Question

在分析云代码中，我很难让矩()、.to()和矩().utcOffset()很好地放在一起。

我把它作为云代码运行在Parse.com上，它总是在UTC上。(简化)代码是

function cafeOpenState(cafe, utcOffset) {
    var returnString;

    var now = moment();
    now.utcOffset(utcOffset);
    var dayStr = now.format('ddd');

    // Get appropriate open and closing times
    var openTime = Number(cafe.get('OpenTime')); // stored as 3-4 digit integer e.g. 830
    var closeTime = Number(cafe.get('CloseTime')); // stored as 3-4 digit integer e.g. 2130

    // Figure out what time it is now, in 0-2400 format
    var timeNowStr = now.format('Hmm'); // need this later
    var timeNow = Number(timeNowStr);

    // Find out where it is currently in the time range
    if (openTime == 0 && closeTime == 0) {
        returnString = 'Closed today';
    } else if (timeNow < openTime) {
        var openTimeMoment = moment(openTime, 'Hmm');
        var opensIn = now.to(openTimeMoment);
        var opensInStr = openTimeMoment.format('H:mm');
        returnString = 'Not yet open, opens ' + opensIn + ' at ' + opensInStr;
    } else if (timeNow > openTime && timeNow < closeTime) {
        var closeTimeMoment = moment(closeTime, 'Hmm');
        var closesIn = now.to(closeTimeMoment);
        var closesInStr = closeTimeMoment.format('H:mm');
        returnString = 'Currently open , closes ' + closesIn + ' at ' + closesInStr;
    } else if (timeNow > closeTime) {
        returnString = 'Closed for today';
    } else {
        returnString = 'error';
    }

    // Return a human readable string
    return returnString;
}

问题是，即使“现在”、“openTimeMoment”和“closeTimeMoment”显示了正确的UTC调整时间，“to”函数似乎忽略了“现在”。例如，我得到的输出类似于(当时间是15:00，并且我已经检查now是正确的) 'Currently open, closes in 10 hours at 17:00'。

如果不包括8小时的世界协调时调整数，10小时是正确的。但很明显应该是两个小时。

无法在JSFiddle中复制此操作--工作正常。我在Parse上使用的moment.js版本与在小提琴上使用的版本相同。有什么想法吗？

Answer 1

我解决了-我用错了utcOffset。

我设法通过删除now.utcOffset(utcOffset);并将其替换为now.add(utcOffset - now.utcOffset(), 'minutes');来纠正我的函数。

如果有更好的答案，我想看看.