全局地更改语言环境

默认情况下，Day.js 仅提供英语语言环境。

¥By default, Day.js comes with English locale only.

如果你需要其他语言环境，可以按需加载。

¥If you need other locales, you can load them on demand.

require('dayjs/locale/de')

加载语言环境后，它就会成为活动语言环境。要更改活动区域设置，只需使用已加载区域设置的键调用 dayjs.locale 即可更改全局区域设置。

¥Once you load a locale, it becomes the active locale. To change active locales, simply call dayjs.locale with the key of a loaded locale to change global locale.

更改全局区域设置不会影响现有实例。

¥Changing the global locale doesn't affect existing instances.

dayjs.locale('de') // use loaded locale globally
dayjs.locale('en') // switch back to default English locale globally