moment-timezone setDefault 未按预期运行

Question

使用以下代码：

console.log(moment().toJSON());
moment.tz.setDefault("Europe/Brussels");
console.log(moment().toJSON());

我得到以下结果：

2019-05-12T10:39:12.851Z
2019-05-12T10:39:12.863Z

但是，当我阅读 moment-timezone 的文档时，setDefault 应该将我的默认时区设置为 "Europe/Brussels"，因此输出应该是：

2019-05-12T10:39:12.851Z
2019-05-12T11:39:12.863Z

显然，setDefault 不能用于我想要的（生成新日期，就好像我在指定时区），那么最好的选择是什么？

Answer 1

setDefault works as expected, the issue is the way you are displaying the value of moment instances. toJSON() shows time for UTC (See also toISOString(): .toISOString() returns UTC 时间戳):

When serializing an object to JSON, if there is a Moment object, it will be represented as an ISO8601 string, adjusted to UTC.

If instead you would like an ISO8601 string that reflects the moment's utcOffset(), then you can modify the toJSON function like this:
moment.fn.toJSON = function() { return this.format(); }

所以你可以使用 format() 来代替，这里是一个活生生的例子：

console.log(moment().toJSON());
console.log(moment().format());
moment.tz.setDefault("Europe/Brussels");
console.log(moment().toJSON());
console.log(moment().format());

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment-timezone/0.5.23/moment-timezone-with-data-2012-2022.min.js"></script>

moment-timezone setDefault 未按预期运行

moment-timezone setDefault not behaving as expected

momentjs

moment-timezone