TypeScript

Day.js 在 NPM 包中附带了 TypeScript 的官方类型声明，开箱即用。

¥Day.js ships with official type declarations for TypeScript in NPM package out of the box.

通过 NPM 安装

¥Install via NPM

npm install dayjs

在 TypeScript 文件中导入并使用

¥Import and use in your TypeScript file

import * as dayjs from 'dayjs'
dayjs().format()

导入 Day.js 时遇到问题？

¥Have trouble importing Day.js?

如果你的 tsconfig.json 包含以下配置，则必须执行默认导入工作流程 import dayjs from 'dayjs'：

¥If your tsconfig.json contains the following config, you must do the default import workflow import dayjs from 'dayjs':

{ //tsconfig.json
  "compilerOptions": {
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
  }
}

如果你没有上面的这些配置，默认导入将不起作用，你将继续使用 import * as dayjs from 'dayjs'

¥If you don't have these config above, the default import won't work, and you'll continue to have to use import * as dayjs from 'dayjs'

区域设置和插件导入

¥Locale and plugin import

要使用语言环境和插件，你首先需要导入目标语言和插件。

¥To use locale and plugin, you first need to import the targeting language and plugin.

import * as dayjs from 'dayjs'
import * as isLeapYear from 'dayjs/plugin/isLeapYear' // import plugin
import 'dayjs/locale/zh-cn' // import locale

dayjs.extend(isLeapYear) // use plugin
dayjs.locale('zh-cn') // use locale