Moment.js isAfter() Function

Moment.js isBefore() Function

Last Updated : 17 Mar, 2023

It is used to check whether a date is before a particular date in Node.js using the isBefore() function that checks if a moment is before another moment. The first argument will be parsed as a moment, if not already so.

Syntax:

moment().isBefore(Moment|String|Number|Date|Array);
moment().isBefore(Moment|String|Number|Date|Array, String);

Parameter: It can hold either Moment|String|Number|Date|Array.

Returns: True or False

Installation of moment module:

You can visit the link to the Install moment module. You can install this package by using this command.

npm install moment

After installing the moment module, you can check your moment version in the command prompt using the command.

npm version moment

After that, you can just create a folder and add a file, for example, index.js. To run this file you need to run the following command.

node index.js

Project Structure:

Example 1: Filename: index.js

javascript

// Requiring module
const moment = require('moment');
 
let  bool1 = moment('2010-10-20')
    .isBefore('2010-10-21'); // true
console.log(bool1);
 
let  bool2 = moment('2010-10-20')
    .isBefore('2010-12-31', 'year'); // false
console.log(bool2);

Steps to run the program:

Make sure you have installed the moment module using the following command:

npm install moment

Run the index.js file using the below command:

node index.js

Output:

true
false

Example 2: Filename: index.js

javascript

// Requiring module
const moment = require('moment');
 
function checkIsBefore(date1, date2) {
    return moment(date1).isBefore(date2); 
}
 
let  bool = checkIsBefore('2010-10-20', '2010-10-21');
console.log(bool);

Steps to run the program:

Run the index.js file using the below command:

node index.js

Output:

true

Reference: https://momentjs.com/docs/#/query/is-before/

Moment.js isAfter() Function

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