84 lines
2.0 KiB
Markdown
84 lines
2.0 KiB
Markdown
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# Getting Started
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## Table of Contents
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- [Introduction](#introduction)
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- [Submodules](#submodules)
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- [Installation](#installation)
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## Introduction
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**date-fns** provides the most comprehensive, yet simple and consistent toolset
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for manipulating **JavaScript dates** in **a browser** & **Node.js**.
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**date-fns** is like [lodash](https://lodash.com) for dates. It has
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[**140+ functions** for all occasions](https://date-fns.org/docs/).
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```js
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import { format, compareAsc } from 'date-fns'
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format(new Date(2014, 1, 11), 'MM/dd/yyyy')
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//=> '02/11/2014'
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const dates = [new Date(1995, 6, 2), new Date(1987, 1, 11), new Date(1989, 6, 10)]
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dates.sort(compareAsc)
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//=> [
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// Wed Feb 11 1987 00:00:00,
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// Mon Jul 10 1989 00:00:00,
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// Sun Jul 02 1995 00:00:00
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// ]
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```
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## Submodules
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**date-fns** includes some optional features as submodules in the npm package.
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Here is the list of them, in order of nesting:
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- FP — functional programming-friendly variations of the functions. See [FP Guide](https://date-fns.org/docs/FP-Guide);
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- UTC (in development) — variations of the functions which calculate dates in UTC±00:00 timezone.
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The later submodules are also included inside the former if you want to use multiple features from the list.
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To use submodule features, [install the npm package](#npm) and then import a function from a submodule:
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```js
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// The main submodule:
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import addDays from 'date-fns/addDays'
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// FP variation:
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import addDays from 'date-fns/fp/addDays'
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// UTC variation:
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import addDays from 'date-fns/utc/addDays'
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// Both FP and UTC:
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import addDays from 'date-fns/fp/utc/addDays'
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// With tree-shaking enabled:
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import { addDays, format } from 'date-fns/fp'
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```
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## Installation
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The library is available as an [npm package](https://www.npmjs.com/package/date-fns).
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To install the package, run:
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```bash
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npm install date-fns --save
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# or
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yarn add date-fns
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```
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Start using:
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```js
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import { formatDistance, subDays } from 'date-fns'
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formatDistance(subDays(new Date(), 3), new Date())
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//=> "3 days ago"
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```
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