如何使用 Microsoft 时区和时刻 js 获取 UTC 日期字符串

Question

我有以下时区数据列表，我想使用时刻 js 将 Samoa Standard Time 的时间转换为 utc 时间。

   var timezones = [
                    {
                      "alias":"Dateline Standard Time",
                      "displayName":"(UTC-12:00) International Date Line West"
                    },
                    {
                      "alias":"Samoa Standard Time",
                      "displayName":"(UTC+13:00) Samoa"
                    },
                    {
                       "alias":"UTC-11",
                       "displayName":"(UTC-11:00) Coordinated Universal Time-11"
                    },
                    {
                      "alias":"Aleutian Standard Time",
                      "displayName":"(UTC-10:00) Aleutian Islands"
                    }   
    ] 

这是获取 2020-02-25T19:30:00 萨摩亚标准时间的 UTC 时间的正确方法吗？

   var m = moment().utcOffset('+13:00');
    m.toISOString();

Answer 1

如果这是你想要的，请告诉我

沙盒：https://codesandbox.io/s/compassionate-bas-fg1c2

var moment = require("moment-timezone");
var input = "05/30/2014 11:21:37 AM";
var format = "MM/DD/YYYY h:mm:ss A";
var zone = "Pacific/Samoa";
// construct a moment object
var momentObj = moment.tz(input, format, zone);
// convert it to utc
momentObj.utc();
var finalVal = momentObj.format(format);
console.log(finalVal);