Moment js handles dates and times with ease, with example code

Mondo Technology Updated on 2024-01-29

Hello, I'm Berg Front-End Factory, and in this issue, I bring you a convenient JS library for dealing with dates and times: Momentjs, it will be very convenient to use this class library to deal with time, welcome to like and pay attention to the old iron, if you have front-end custom development needs, you can send us a private message.

moment.JS is a popular j**ascript date and time processing library. It provides a number of powerful methods for parsing, verifying, manipulating, and formatting dates and times.

moment.Some of the key features of JS include:

Parsing and validation：moment.js can parse strings into date objects and verify the validity of the date. It supports a wide range of date formats, such as ISO 8601, RFC 2822, and more.

Formatting and display：moment.JS can format date objects into specific string representations. It offers flexible formatting options to customize how the date and time are displayed.

Operations and calculations：moment.JS can perform various operations and calculations on dates and times. It supports operations such as adding, subtracting, comparing and differing, and can easily calculate dates and times.

Format parsing：moment.js can parse the date and time based on a specific format string. It supports custom formats and can parse a variety of different date and time representations.

Localization：moment.JS supports localization, and dates and times can be formatted and displayed according to different regional and language settings. It offers a wealth of localization options and language support.

moment.JS is widely used in web development to handle date and time-related tasks such as calendars, time pickers, countdowns, etc. Its ease of use and power make it easy for developers to handle a variety of date and time needs.

Use momentjs needs to be installed with momentjs library. You can use npm or yarn to install momentjs：

npm install moment
Or. 

yarn add moment
After the installation is complete, you can use the import statement to introduce momentjs library. 

import moment from 'moment'
You can then use momentVarious features of js.

Here are some examples of common usage:

Format date and time:

Format the current date let formatteddate = moment().format('yyyy-mm-dd');Formatting the specified datelet formatteddate = moment('2022-01-01').format('yyyy-mm-dd');Format the current timelet formattedtime = moment().format('hh:mm:ss');Format the specified time let formattedtime = moment('12:30:00', 'hh:mm:ss').format('hh:mm:ss');
Parse date and time:

parse date let date = moment('2022-01-01', 'yyyy-mm-dd');parse time let time = moment('12:30:00', 'hh:mm:ss');
Operation and calculation date and time:

Add a day let tomorrow = moment()add(1, 'day');Subtract the weeklet lastweek = moment()subtract(1, 'week');Compare datelet isafter = moment('2022-01-01').isafter('2021-12-31');Calculate the date difference let diff = moment('2022-01-01').diff('2021-12-31', 'days');
It should be noted that momentThe JS API is very rich, and you can consult the official documentation to learn more about the usage and options according to your specific needs. Also, if you use moment. frequently in vuejs, you can consider adding momentJS is encapsulated as a global filter or custom directive for more convenient use in templates.

Get the parts of the current date and time:

import moment from 'moment';Get the current year const year = moment()year();Get the current month const month = moment()month();Get the current date const date = moment()date();Get the current hour const hour = moment()hour();Get the current minute const minute = moment()minute();Get the current number of seconds const second = moment()second();
Parse the date and time according to the specified format:

import moment from 'moment';Parse date const date = moment('2022-01-01', 'yyyy-mm-dd');Parsing time const time = moment('12:30 pm', 'h:mm a');
Formatting Relative Time:

import moment from 'moment';Formatted as relative time const relativetime = moment('2022-01-01').fromnow();Formatted as relative time with the suffix const relativetimewithsuffix = moment('2022-01-01').fromnow(true);
Get all dates between two dates:

import moment from 'moment';Get all dates between two dates const startdate = moment('2022-01-01');const enddate = moment('2022-01-05');const alldates = while (startdate.issameorbefore(enddate))
, multi-language environment support

moment.locale();// zh-cnmoment().format('lt'); // 21:44moment().format('lts'); // 21:44:28moment().format('l'); // 2023/07/30moment().format('l'); // 2023/7/30moment().format('ll');July 30, 2023 moment().format('ll');July 30, 2023 moment().format('lll');July 30, 2023 9:44 p.m. moment().format('lll');July 30, 2023 21:44moment()format('llll');Sunday, July 30, 2023 at 9:44 p.m. moment().format('llll');
These are momentsA few other examples of common uses of JS, I hope it will be helpful to you!Don't forget to check out momentThe official documentation for js for more details.

moment.JS is a j**ascript library for parsing, manipulating, and formatting dates and times, and it provides a number of convenient methods and functions for handling dates and times. It can be used to create custom date pickers or integrate with other date picker libraries.

If you want to use momentjs to create custom date pickers, you can use momentJS API to get the current date, set the date, calculate the date difference, and so on. You can use HTML and j**ascript to create an interactive date picker that you can use when the user selects a datejs to handle the selected date.

Here's a use of momentExample of js creating a custom date picker:

select a date:
In the example above, we created a text input box in HTML as a date picker and used Momentjs sets the default value to the current date. We then use the AddEventListener method to listen for changes in the value of the date picker and use Momentjs parses the selected date. You can do other things in the event handler, such as calculating date differences, formatting dates, and so on.

If you want to use existing date picker libraries such as Bootstrap Datepicker, React Datepicker, etc., you can use Momentjs to parse and format dates. These date picker libraries are usually provided with momentJS integration options for more convenient handling of dates and times.

In short, momentJS can be used with custom date pickers or other date picker libraries to make it easier to work with dates and times. Whichever way you choose, momentJS provides a wealth of features and methods to meet your date processing needs.

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