[Javascript] moment.jsライブラリの使用方法

Intro

Install

npm install moment --save   # npm
yarn add moment             # Yarn
Install-Package Moment.js   # NuGet
spm install moment --save   # spm
meteor add momentjs:moment  # meteor
bower install moment --save # bower (deprecated)

How to use

Format Dates

moment().format('MMMM Do YYYY, h:mm:ss a'); // April 18th 2022, 8:56:48 am
moment().format('dddd');                    // Monday
moment().format("MMM Do YY");               // Apr 18th 22
moment().format('YYYY [escaped] YYYY');     // 2022 escaped 2022
moment().format();                         

Relative Time

moment("20111031", "YYYYMMDD").fromNow(); // 10 years ago
moment("20120620", "YYYYMMDD").fromNow(); // 10 years ago
moment().startOf('day').fromNow();        // 9 hours ago
moment().endOf('day').fromNow();          // in 15 hours
moment().startOf('hour').fromNow();      

Calendar Time

moment().subtract(10, 'days').calendar(); // 04/08/2022
moment().subtract(6, 'days').calendar();  // Last Tuesday at 8:57 AM
moment().subtract(3, 'days').calendar();  // Last Friday at 8:57 AM
moment().subtract(1, 'days').calendar();  // Yesterday at 8:57 AM
moment().calendar();                      // Today at 8:57 AM
moment().add(1, 'days').calendar();       // Tomorrow at 8:57 AM
moment().add(3, 'days').calendar();       // Thursday at 8:57 AM
moment().add(10, 'days').calendar();     

Multiple Locale Support

moment.locale();         // en
moment().format('LT');   // 8:57 AM
moment().format('LTS');  // 8:57:41 AM
moment().format('L');    // 04/18/2022
moment().format('l');    // 4/18/2022
moment().format('LL');   // April 18, 2022
moment().format('ll');   // Apr 18, 2022
moment().format('LLL');  // April 18, 2022 8:57 AM
moment().format('lll');  // Apr 18, 2022 8:57 AM
moment().format('LLLL'); // Monday, April 18, 2022 8:57 AM
moment().format('llll');