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https://github.com/zapier/intl-dateformat
Format a date using Intl.DateTimeFormat goodness.
https://github.com/zapier/intl-dateformat
date format i18n intl-dateformat javascript l10n library module small timezone
Last synced: 15 days ago
JSON representation
Format a date using Intl.DateTimeFormat goodness.
- Host: GitHub
- URL: https://github.com/zapier/intl-dateformat
- Owner: zapier
- License: mit
- Created: 2018-12-26T17:53:46.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2023-09-12T16:21:26.000Z (about 1 year ago)
- Last Synced: 2024-10-28T15:57:22.328Z (about 1 month ago)
- Topics: date, format, i18n, intl-dateformat, javascript, l10n, library, module, small, timezone
- Language: TypeScript
- Size: 10.2 MB
- Stars: 62
- Watchers: 19
- Forks: 8
- Open Issues: 2
-
Metadata Files:
- Readme: readme.md
- License: license
Awesome Lists containing this project
- awesome - intl-dateformat - Format a date using Intl.DateTimeFormat goodness. (TypeScript)
README
Format a date using Intl.DateTimeFormat goodness.
Features •
Installation •
Example •
Usage
**intl-dateformat** is a simple date formatting library that leverage the [Intl.DateTimeFormat](https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/DateTimeFormat) API to format dates in different languages and timezones without having to clutter your JavaScript bundles.
## Features
- ✌ **Small**: As it directly leverages `Intl.DateTimeFormat`, there is no need to bundle additional locales or a timezones database. It's already in your Browser!
- 👌**Simple**: It supports a subset of ISO 8601 formats, discarding very rarely used date parts.
- 🤟 **Extensible**: That said, if you want to customize things you can pass [custom formatters](#custom-formatters).
## Installation
```js
$ npm install intl-dateformat
```
## Example
```js
import formatDate from 'intl-dateformat'
const date = new Date(Date.UTC(1984, 0, 17, 16, 13, 37, 0))
formatDate(date, 'YYYY-MM-DD hh:mm:ss A')
// → 1984-01-17 04:13:37 PM
formatDate(date, 'YYYY-MM-DD hh:mm:ss A', { timezone: 'Asia/Singapore' })
// → 1984-01-18 00:13:37 AM
formatDate(date, 'YYYY, MMMM dddd DD')
// → 1984, January Tuesday 17
formatDate(date, '[It is] dddd [today!]')
// → It is Tuesday today!
formatDate(date, 'YYYY, MMMM dddd DD', { locale: 'fr' })
// → 1984, Janvier Mardi 17
```
## Usage
```js
import formatDate from 'intl-dateformat'
const date = new Date(Date.UTC(1984, 0, 17, 16, 13, 37, 0))
formatDate(date, 'YYYY-MM-DD hh:mm:ss A')
// → 1984-01-17 04:13:37 PM
```
| Argument | Description | Type |
| --------- | ------------------------- | ----------------------- |
| `date` | The date to format | `Date`, `number` |
| `format` | The format to use | See [Format](#format) |
| `options` | Custom locale or timezone | See [Options](#options) |
### Format
The format is a combination of the following masks:
| Mask | Description | Example |
| ------ | --------------------- | ---------- |
| `YYYY` | 4-digits year | `1984` |
| `YY` | 2-digits year | `84` |
| `MMMM` | Month name | `January` |
| `MMM` | Short month name | `Jan` |
| `DD` | 2-digits day | `17` |
| `dddd` | Day of the week | `Tuesday` |
| `ddd` | Short day of the week | `Tue` |
| `A` | Day period | `AM`, `PM` |
| `a` | Lowercased day period | `am`, `pm` |
| `HH` | 24-hours hour | `16` |
| `hh` | 12-hours hour | `04` |
| `mm` | 2-digit minute | `13` |
| `ss` | 2-digit second | `37` |
Masks will be replaced by their associated date part.
You can also pass string literals in the format by surrouding them with a `[]`:
```js
formatDate(date, '[It is] dddd [today!]')
// → It is Tuesday today!
```
### Options
- `locale` - A [BCP 47](https://tools.ietf.org/html/bcp47) tag to identify the output language
- Type: `string`
- Default: The system locale
- Example: `fr`, `fr-FR`
- `timezone` - A [IANA timezone](https://www.iana.org/time-zones)
- Type: `string`
- Default: The system timezone
- Example: `Europe/Paris`, `America/Chicago`
## Custom formatters
If you find yourself missing some date parts, no problem we got you covered. You can create your own `dateFormat` function and add your custom formatters:
```js
import { createDateFormatter } from 'intl-dateformat'
const formatDate = createDateFormatter({
// numeric hour
h: ({ hour }) => hour[0] === '0' ? hour[1] : hour
// milliseconds
SSS: (parts, date) => String(date.getTime()).slice(-3)
})
const date = new Date(Date.UTC(1984, 0, 17, 16, 13, 37, 0))
formatDate(date, 'YYYY-MM-DD h:mm:ss.SSS')
// → 1984-01-17 4:13:37.505
```
| Argument | Description | Type |
| ------------ | ----------------- | ----------------------------- |
| `formatters` | Custom formatters | See [Formatters](#formatters) |
### Formatters
Formatters are represented as a dictionary of functions, where the key represents the mask that is to be matched in the `format` and the value is the function that will format the date.
The formatter function takes the following arguments:
- `parts` - An object containing all the date parts provided by `Intl.DateTimeFormat`. You can inspect the [DatePartName](./src/types.ts) type for an exhaustive list of all the date parts
- `date` - The original date passed to the `formatDate` function.