date-format-deno

import { dateToString } from "https://deno.land/x/date_format_deno/mod.ts"

// use current date
dateToString("dd-MM-yyyy"); // return : "06-07-2020"
dateToString("hh:mm:ss");   // return : "12-11-10"
...

const myDate = new Date("2020-12-11T10:09:54.321");
dateToString("yyyy-MM-dd hh:mm:ss", myDate); // return : "2020-12-11 10:09:54"
dateToString("hh:mm:ss.SSS", myDate);        // return : "10:09:54.321"
...

// all formats
dateToString("dd-MM-y-yy-yyy-yyyy hh:mm:ss:SSS O P", new Date("2020-12-11T10:09:54.321"));
// return : "11-12-20-20-20-2020 10:09:54:321 +0300 +03:00"
...

// use predefined format
const date = new Date("2020-12-11T10:09:54.321");
dateToString("ISO8601", date);                // return : "2020-12-11T10:09:54.321"
dateToString("ISO8601_WITH_TZ_OFFSET", date); // return : "2020-12-11T10:09:54.321+0300"
dateToString("DATE", date);                   // return : "2020-12-11"
dateToString("TIME", date);                   // return : "10:09:54"
dateToString("DATETIME", date);               // return : "2020-12-11 10:09:54"
dateToString("ABSOLUTETIME", date);           // return : "10:09:54.321"

// use default format
dateToString(date);                           // return : "2020-12-11 10:09:54.321"
...

import {
  dateToString,
  registerFormat,
} from "https://deno.land/x/date_format_deno/mod.ts";

// new format
registerFormat({ myFormat: "yyyy/MM/dd hh-mm-ss" });
...

dateToString("MYFORMAT"); // return : "2020/07/06 05-04-03"
...

// redefine format
registerFormat({ default: "hh:mm:ss dd.MM.yyyy", time: "hh:mm" });
...

const date = new Date("2020-12-11T10:09:54.321");
dateToString(date);         // return : "10:09:54 11.12.2020"
dateToString("TIME", date); // return : "09:54"
...

import {
  dateToString,
  utcDate,
} from "https://deno.land/x/date_format_deno/mod.ts";

const nowDate = new Date();
const utcNowDate = utcDate();

dateToString(nowDate);    // return : "2020-07-30 16:19:14.395"
dateToString(utcNowDate); // return : "2020-07-30 13:19:14.395"
...

const tmpDate = new Date("2020-12-11T10:09:54.321");
const tmpUtcDate = utcDate(tmpDate);

dateToString(nowDate);    // return : "2020-12-11 10:09:54.321"
dateToString(utcNowDate); // return : "2020-12-11 07:09:54.321"
...

import { getGMTOffset } from "https://deno.land/x/date_format_deno/mod.ts";

const nowDate = new Date();

getGMTOffset(nowDate.getTimezoneOffset());       // return : "+0300"

// use delimiter
getGMTOffset(nowDate.getTimezoneOffset(), true); // return : "+03:00"
...

let offset = 345;

getGMTOffset(offset);       // return : "-0545"
getGMTOffset(offset, true); // return : "-05:45"
...

offset = -570;

getGMTOffset(offset);       // return : "+0930"
getGMTOffset(offset, true); // return : "+09:30"
...