# dayjs-jp-era

## 目的

dayjsのformatにて日本の元号を表示するプラグインです。<br>
<https://github.com/hyakt/dayjs-jp-format> さんをフォークしてます。<br>
理由：平成30年のときに「平成30」、令和4年のとき「令和4年」と表記されてしまっていたため。

Usage
---

1. Install the repository

```bash
npm install --save dayjs-jp-format
npm install --save dayjs # peer dependency
```

or

```bash
yarn add dayjs-jp-format
yarn add dayjs # peer dependency
```

2. Import the jp format

```javascript
import { jpFormat } from 'dayjs-jp-era'
dayjs.extend(jpFormat) // use plugin

const date = '2020-06-24'
const result = dayjs(date).format('rrrr')
console.log(result); //-> 令和2

const result = dayjs(date).format('rrrr年')
console.log(result); //-> 令和2年

const result = dayjs(date).format('rrr')
console.log(result); //-> 令和2年

const result = dayjs(date).format('rr')
console.log(result); //-> 令和
```

Format
---

| Format | Output           | Description                           |
| ------ | ---------------- | ------------------------------------- |
| `rrrr` | 令和2            | 日付に応じた和暦(年は除く)                 |
| `rrr`  | 令和2年          | 年あり
| `rr`   | 令和              | 日付に応じた元号                         |


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dayjs-jp-era

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Format	Output	Description
`rrrr`	令和2	日付に応じた和暦(年は除く)
`rrr`	令和2年	年あり
`rr`	令和	日付に応じた元号

dayjs-jp-era

dayjs-jp-era

目的

Usage

Format

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