You don't (may not) need Moment.js
Moment.js is a fantastic date library with lots of great features and utilities. However, when you are working on a performance sensitive web application, it might have a huge performance overhead because of the complex API and large bundle size.
Problems with Moment.js:
- Highly based on OOP API, which makes it won't work with tree-shaking, thus leading to a huge bundle size and performance issue.
- Moment.js is mutable due to OOP API and non-pure function, which causes bugs: https://github.com/moment/moment/blob/develop/src/test/moment/add_subtract.js#L244-L286
Only use some simple functions from moment.js might be considered overkill, date-fns can be a good replacement in this case. see moment/moment#2373 for more ideas of why and how people switch from moment.js to date-fns.
Voice of Developers
Removed moment.js to replace with date-fns - build output reduced by 40%
—Jared Farago from webnode project.
—Dan Abramov, Author of Co-author of Redux and Create React App. Building tools for humans.
—Matija Marohnić, a design-savvy frontend developer from Croatia.
—Sergey Petushkov, a javaScript developer from Moscow, Russia • Currently in Berlin, Germany.
ESLint Plugin
If you're using ESLint, you can install a plugin that will help you identify places in your codebase where you don't (may not) need Moment.js.
Install the plugin...
npm install --save-dev eslint-plugin-you-dont-need-momentjs...then update your config
"extends" : ["plugin:you-dont-need-momentjs/recommended"],Quick Links
- Millisecond/Second/Minute/Hour
- Date of Month
- Day of Week
- Day of Year
- Week of Year
- Days in Month
- Weeks in Year
- Maximum of the given dates
- Minimum of the given dates
Parse
String + Date Format
Return the date parsed from date string using the given format string.
// Moment.js
moment("12-25-1995", "MM-DD-YYYY");
// => "1995-12-24T13:00:00.000Z"
// date-fns
import parse from "date-fns/parse";
parse("12-25-1995", "MM-dd-yyyy", new Date());
// => "1995-12-24T13:00:00.000Z"String + Time Format
Return the date parsed from time string using the given format string.
// Moment.js
moment("2010-10-20 4:30", "YYYY-MM-DD HH:mm");
// => "2010-10-19T17:30:00.000Z"
// date-fns
import parse from "date-fns/parse";
parse("2010-10-20 4:30", "yyyy-MM-dd H:mm", new Date());
// => "2010-10-19T17:30:00.000Z"String + Format + locale
Return the date parsed from string using the given format string and locale.
// Moment.js
moment("2012 mars", "YYYY MMM", "fr");
// => "2012-02-29T13:00:00.000Z"
// date-fns
import parse from "date-fns/parse";
import fr from "date-fns/locale/fr";
parse("2012 mars", "yyyy MMMM", new Date(), { locale: fr });
// => "2012-02-29T13:00:00.000Z"Get + Set
Millisecond / Second / Minute / Hour
Get the Millisecond/Second/Minute/Hour of the given date.
// Moment.js
moment().seconds();
// => 49
moment().hours();
// => 19
// Native
new Date().getSeconds();
// => 49
new Date().getHours();
// => 19Set the Millisecond/Second/Minute/Hour of the given date.
// Moment.js
moment().seconds(30);
// => "2018-09-09T09:12:30.695Z"
moment().hours(13);
// => "2018-09-09T03:12:49.695Z"
// Native
new Date(new Date().setSeconds(30));
// => "2018-09-09T09:12:30.695Z"
new Date(new Date().getHours(13));
// => "2018-09-09T03:12:49.695Z"Date of Month
Gets or sets the day of the month.
// Moment.js
moment().date();
// => 9
moment().date(4);
// => "2018-09-04T09:12:49.695Z"
// Native
new Date().getDate();
// => 9
new Date().setDate(4);
// => "2018-09-04T09:12:49.695Z"Day of Week
Gets or sets the day of the week.
// Moment.js
moment().day();
// => 0
moment().day(-14);
// => "2018-08-26T09:12:49.695Z"
// Native
new Date().getDay();
// => 0
new Date().setDate(new Date().getDate() - 14);
// => "2018-08-26T09:12:49.695Z"Day of Year
Gets or sets the day of the year.
// Moment.js
moment().dayOfYear();
// => 252
moment().dayOfYear(256);
// => "2018-09-13T09:12:49.695Z"
// date-fns
import getDayOfYear from "date-fns/getDayOfYear";
getDayOfYear(new Date());
// => 252
import setDayOfYear from "date-fns/setDayOfYear";
setDayOfYear(new Date(), 256);
// => "2018-09-13T09:12:49.695Z"Week of Year
Gets or sets the week of the year.
// Moment.js
moment().week();
// => 37
moment().week(24);
// => "2018-06-10T09:12:49.695Z"
// date-fns
import getWeek from "date-fns/getWeek";
getWeek(new Date());
// => 37
import setWeek from "date-fns/setWeek";
setWeek(new Date(), 24);
// => "2018-06-10T09:12:49.695Z"Days in Month
Get the number of days in the current month.
// Moment.js
moment("2012-02", "YYYY-MM").daysInMonth();
// => 29
// date-fns
import getDaysInMonth from "date-fns/getDaysInMonth";
getDaysInMonth(new Date(2012, 1));
// => 29Weeks in Year
Gets the number of weeks in the current year, according to ISO weeks.
// Moment.js
moment().isoWeeksInYear();
// => 52
// date-fns
import getISOWeeksInYear from "date-fns/getISOWeeksInYear";
getISOWeeksInYear(new Date());
// => 52Maximum of the given dates
Returns the maximum (most distant future) of the given date.
const array = [
new Date(2017, 4, 13),
new Date(2018, 2, 12),
new Date(2016, 0, 10),
new Date(2016, 0, 9)
];
// Moment.js
moment.max(array.map(a => moment(a)));
// => "2018-03-11T13:00:00.000Z"
// date-fns
import max from "date-fns/max";
max(array);
// => "2018-03-11T13:00:00.000Z"Minimum of the given dates
Returns the minimum (most distant future) of the given date.
const array = [
new Date(2017, 4, 13),
new Date(2018, 2, 12),
new Date(2016, 0, 10),
new Date(2016, 0, 9)
];
// Moment.js
moment.min(array.map(a => moment(a)));
// => "2016-01-08T13:00:00.000Z"
// date-fns
import min from "date-fns/min";
min(array);
// => "2016-01-08T13:00:00.000Z"Manipulate
Add
Add the specified number of days to the given date.
// Moment.js
moment().add(7, "days");
// => "2018-09-16T09:12:49.695Z"
// date-fns
import addDays from "date-fns/addDays";
addDays(new Date(), 7);
// => "2018-09-16T09:12:49.695Z"Subtract
Subtract the specified number of days from the given date.
// Moment.js
moment().subtract(7, "days");
// => "2018-09-02T09:12:49.695Z"
// date-fns
import subDays from "date-fns/subDays";
subDays(new Date(), 7);
// => "2018-09-02T09:12:49.695Z"Start of Time
Return the start of a unit of time for the given date.
// Moment.js
moment().startOf('month');
// => "2018-08-31T14:00:00.000Z"
// date-fns
import startOfMonth from 'date-fns/startOfMonth';
startOfMonth(new Date();
// => "2018-08-31T14:00:00.000Z"End of Time
Return the end of a unit of time for the given date.
// Moment.js
moment().endOf('day');
// => "2018-09-09T13:59:59.999Z"
// date-fns
import endOfDay from 'date-fns/endOfDay';
endOfDay(new Date();
// => "2018-09-09T13:59:59.999Z"Display
Format
Return the formatted date string in the given format.
// Moment.js
moment().format("dddd, MMMM Do YYYY, h:mm:ss A");
// => "Sunday, September 9th 2018, 7:12:49 PM"
moment().format("ddd, hA");
// => "Sun, 7PM"
// date-fns
import format from "date-fns/format";
format(new Date(), "eeee, MMMM do YYYY, h:mm:ss aa");
// => "Sunday, September 9th 2018, 7:12:49 PM"
format(new Date(), "eee, ha");
// => "Sun, 7PM"Time from now
Return time from now.
// Moment.js
moment([2018, 8, 9]).fromNow();
// => "about 4 hours ago"
// date-fns
import formatDistance from "date-fns/formatDistance";
formatDistance(new Date(2018, 8, 9), new Date(), { addSuffix: true });
// => "4 hours ago"Time from x
Return time from x.
// Moment.js
moment([2007, 0, 27]).to(moment([2007, 0, 29]));
// => "in 2 days"
// date-fns
import formatDistance from "date-fns/formatDistance";
formatDistance(new Date(2007, 0, 27), new Date(2007, 0, 29));
// => "2 days"Difference
Get the unit of time between the given dates.
// Moment.js
moment([2007, 0, 27]).diff(moment([2007, 0, 29]));
// => -172800000
moment([2007, 0, 27]).diff(moment([2007, 0, 29]), "days");
// => -2
// date-fns
import differenceInMilliseconds from "date-fns/differenceInMilliseconds";
differenceInMilliseconds(new Date(2007, 0, 27), new Date(2007, 0, 29));
// => -172800000
import differenceInDays from "date-fns/differenceInDays";
differenceInDays(new Date(2007, 0, 27), new Date(2007, 0, 29));
// => -2Query
Is Before
Check if a date is before another date.
// Moment.js
moment("2010-10-20").isBefore("2010-10-21");
// => true
// date-fns
import isBefore from "date-fns/isBefore";
isBefore(new Date(2010, 9, 20), new Date(2010, 9, 21));
// => trueIs Same
Check if a date is same another date.
// Moment.js
moment("2010-10-20").isSame("2010-10-21");
// => false
moment("2010-10-20").isSame("2010-10-20");
// => true
// date-fns
import isSameDay from "date-fns/isSameDay";
isSameDay(new Date(2010, 9, 20), new Date(2010, 9, 21));
// => false
isSameDay(new Date(2010, 9, 20), new Date(2010, 9, 20));
// => trueIs After
Check if a date is after another date.
// Moment.js
moment("2010-10-20").isAfter("2010-10-19");
// => true
// date-fns
import isAfter from "date-fns/isAfter";
isAfter(new Date(2010, 9, 20), new Date(2010, 9, 19));
// => trueIs Between
Check if a date is between two other dates.
// Moment.js
moment("2010-10-20").isBetween("2010-10-19", "2010-10-25");
// => true
// date-fns
import isWithinInterval from "date-fns/isWithinInterval";
isWithinInterval(new Date(2010, 9, 20), {
start: new Date(2010, 9, 19),
end: new Date(2010, 9, 25)
});
// => trueIs Leap Year
Check if a year is a leap year.
// Moment.js
moment([2000]).isLeapYear();
// => true
// date-fns
import isLeapYear from "date-fns/isLeapYear";
isLeapYear(new Date(2000, 0, 1));
// => trueIs a Date
Check if a variable is a native js Date object.
// Moment.js
moment.isDate(new Date());
// => true
// date-fns
import isDate from "date-fns/isDate";
isDate(new Date());
// => true
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent