What is moment?
The moment npm package is a JavaScript library for parsing, validating, manipulating, and formatting dates. It is widely used for handling dates and times in Node.js and browser applications.
What are moment's main functionalities?
Parsing
Parse a date string into a moment object.
moment('2023-04-05')
Validation
Check if a date is valid.
moment('2023-04-05').isValid()
Manipulation
Manipulate dates by adding time to the current date.
moment().add(7, 'days')
Formatting
Format a moment date object into a string in a specified format.
moment().format('YYYY-MM-DD')
Query
Query dates to compare them.
moment().isBefore('2023-12-25')
Other packages similar to moment
date-fns
Provides a collection of simple, pure functions for manipulating JavaScript dates. It is modular, allowing you to pick and choose which functions you need, and is generally considered to be a lighter-weight alternative to moment.
luxon
Created by one of the original Moment.js team members, Luxon is a modern library for working with dates and times. It offers a fluent API and aims to have a smaller footprint than moment.
dayjs
Day.js is a minimalist JavaScript library that parses, validates, manipulates, and displays dates and times for modern browsers with a largely Moment.js-compatible API. It is lightweight and its API is designed to be familiar to Moment.js users.
A lightweight JavaScript date library for parsing, validating, manipulating, and formatting dates.
Port to ECMAScript 6 (version 2.10.0)
Moment 2.10.0 does not bring any new features, but the code is now written in
ECMAScript 6 modules and placed inside src/
. Previously moment.js
, locale/*.js
and
test/moment/*.js
, test/locale/*.js
contained the source of the project. Now
the source is in src/
, temporary build (ECMAScript 5) files are placed under
build/umd/
(for running tests during development), and the moment.js
and
locale/*.js
files are updated only on release.
If you want to use a particular revision of the code, make sure to run
grunt transpile update-index
, so moment.js
and locales/*.js
are synced
with src/*
. We might place that in a commit hook in the future.
Upgrading to 2.0.0
There are a number of small backwards incompatible changes with version 2.0.0. See the full descriptions here
-
Changed language ordinal method to return the number + ordinal instead of just the ordinal.
-
Changed two digit year parsing cutoff to match strptime.
-
Removed moment#sod
and moment#eod
in favor of moment#startOf
and moment#endOf
.
-
Removed moment.humanizeDuration()
in favor of moment.duration().humanize()
.
-
Removed the lang data objects from the top level namespace.
-
Duplicate Date
passed to moment()
instead of referencing it.
We're looking for co-maintainers! If you want to become a master of time please
write to ichernev.
License
Moment.js is freely distributable under the terms of the MIT license.