Question

我正在使用moment设置/更改我的日期对象的时区，而不是其他任何日期/时间值

这就是我目前正在做的事情：

const moment = require("moment-timezone");
const dateNew = moment.tz(accountDate, "US/Pacific");

这是accountDate值：Mon Jul 08 2019 06:05:22 GMT-0400 (Eastern Daylight Time)

我想将其更改为：Mon Jul 08 2019 06:05:22 GMT-0700 (Pacific Daylight Time)

，但是dateNew仍处于EDT时区。

the output of `console.log(dateNew)` is :


Moment {_isAMomentObject: true, _i: Mon Jul 08 2019 06:05:22 GMT-0400 (Eastern Daylight Time), _isUTC: true, _pf: {…}, _locale: Locale, …}
_d: Sun Jul 07 2019 23:05:22 GMT-0400 (Eastern Daylight Time) {}
_i: Mon Jul 08 2019 06:05:22 GMT-0400 (Eastern Daylight Time) {}
_isAMomentObject: true
_isUTC: true
_isValid: true
_locale: Locale {_calendar: {…}, _longDateFormat: {…}, _invalidDate: "Invalid date", ordinal: ƒ, _dayOfMonthOrdinalParse: /\d{1,2}(th|st|nd|rd)/, …}
_offset: -420
_pf: {empty: false, unusedTokens: Array(0), unusedInput: Array(0), overflow: -2, charsLeftOver: 0, …}
_z: Zone {name: "US/Pacific", abbrs: Array(186), untils: Array(186), offsets: Array(186), population: 15000000}
__proto__: Object

但是console.log(new Date(dateNew))提供以下输出。

Mon Jul 08 2019 06:05:22 GMT-0400 (Eastern Daylight Time)

请帮助。谢谢

Answer 1

您确实在更改时区，一切正常，仅添加format（），我还没有足够的声誉对此发表评论，大声笑，但是为什么要使用Date（），请坚持一下矩（）

 const dateNew = moment.tz(accountDate, "US/Pacific").format();
 console.log(dateNew)

Answer 2

因为您包含了reactjs标签。我会以react.js的方式给你一个答案。您可以安装名为moment-timezone的npm软件包来解决此问题。也请查看他们的docs。这是React中的完整示例

import React, { Component } from "react";
import ReactDOM from "react-dom";
import moment from "moment-timezone";
import "./styles.css";

class App extends Component {
  render() {
    const _date = "Mon Jul 08 2019 06:05:22 GMT-0400 (Eastern Daylight Time)";
    const result = moment.tz(_date, "US/Pacific");
    return (
      <div>
        <p>Origin Date : {_date}</p>
        <p>
          Converted Date : {result.format()} {result.tz()}
        </p>
      </div>
    );
  }
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

上面的代码将得到这样的结果

Answer 3

我将其发布为另一个答案，所以我可以将其添加为代码@Tanu

class TestClassTest {
    var testInstance = TestClass()

    @Test
    fun `Test with default dispatchers should fail`() = runBlocking {
        val valueToModify = testInstance.runAsync().await()
        assertTrue(valueToModify)
    }

    @Test
    fun `Test with dispatchers replaced by Unconfined should pass`() = runBlocking {
        testInstance.DefaultDispatcher = Dispatchers.Unconfined
        testInstance.IODispatcher = Dispatchers.Unconfined
        val valueToModify = testInstance.runAsync().await()
        assertTrue(valueToModify)
    }

    @Test
    fun `I need to also test some functions that use suspend coroutine - How can I do that?`() = runBlocking {
        testInstance.DefaultDispatcher = Dispatchers.Unconfined
        testInstance.IODispatcher = Dispatchers.Unconfined
        val valueToModify = testInstance.runSuspendCoroutine().await()
        assertTrue(valueToModify)//fails
    }
}

class TestClass {
    var DefaultDispatcher: CoroutineContext = Dispatchers.Default
    var IODispatcher: CoroutineContext = Dispatchers.IO
    val viewModelScope = CoroutineScope(DefaultDispatcher)

    fun runAsync(): Deferred<Boolean> {
        return viewModelScope.async(DefaultDispatcher) {
            withContext(IODispatcher) {
                sleep(1000)
                true
            }
        }
    }

    fun runSuspendCoroutine(): Deferred<Boolean> {
        return viewModelScope.async(DefaultDispatcher) {
            suspendCoroutine<Boolean> {
                Thread {
                    sleep(1000)
                    //long running operation calls listener from background thread
                    it.resume(true)
                }.start()
            }
        }
    }
}

此外，您可以像这样添加更改缩写，并在括号中添加一些其他方括号：

const accountDate = 'Mon Jul 08 2019 06:05:22 GMT-0400 (Eastern Daylight Time)' 
const dateNew = moment(accountDate).tz('US/Pacific') 
console.log(dateNew.format('ddd MMM DD YYYY HH:mm:ss [GMT]ZZ zz')) 


//OUTPUT: Mon Jul 08 2019 03:05:22 GMT-0700 PDT

因此输出现在为：

var abbrs = {
    EST : 'Eastern Standard Time',
    EDT : 'Eastern Daylight Time',
    CST : 'Central Standard Time',
    CDT : 'Central Daylight Time',
    MST : 'Mountain Standard Time',
    MDT : 'Mountain Daylight Time',
    PST : 'Pacific Standard Time',
    PDT : 'Pacific Daylight Time',
};

moment.fn.zoneName = function () {
    var abbr = this.zoneAbbr();
    return abbrs[abbr] || abbr;
}

如何更改日期对象的时区

3 个答案: