@jkinfeng/datetime-helper

Datetime helper for JavaScript

JavaScript Date objects represent a single moment in time in a platform-independent format.
Date objects contain a Number that represents milliseconds since 1 January 1970 UTC.
The getTime() method returns the number of milliseconds since the Unix Epoch.
JavaScript uses milliseconds as the unit of measurement, whereas Unix Time is in seconds.
getTime() always uses UTC for time representation.
For example, a client browser in one timezone,
getTime() will be the same as a client browser in any other timezone.
So use the dateObj.getUnixTimeSec() uniform standard in seconds
save the time(integer number) to database or any storage
You don't need to think about timezone

Installation

npm i datetime-helper

Basic usage:

// node.js
// const dth = require('datetime-helper');

// web browser
// <script src='___js_path___/datetime-helper/index.js'></script>
// __DateTime.getUnixTimeSec(...)

API Reference

Syntax

dth.getUnixTimeSec($dateTime, $ms = false)

The getUnixTimeSec() method returns the number of seconds since the Unix Epoch.

Example:

const dth = require('datetime-helper');
dth.getUnixTimeSec(new Date());
dth.getUnixTimeSec(1592494318);
dth.getUnixTimeSec(1592494318856, true);
dth.getUnixTimeSec(Date.now(), true);
dth.getUnixTimeSec('1592494318');
dth.getUnixTimeSec('1592494318856', true);
dth.getUnixTimeSec('1970-01-01');  // A string in RFC2822 or ISO 8601 date format
dth.getUnixTimeSec('1970-01-01T00:00:00.000Z');

dth.getDateZeroTime($dateTime, $ms = false)

The getUnixTimeSec() method returns the number of seconds since the Unix Epoch.

Example:

const dth = require('datetime-helper');
dth.getDateZeroTime(new Date());
dth.getDateZeroTime(1592494318);
dth.getDateZeroTime(1592494318856, true);
dth.getDateZeroTime(Date.now(), true);
dth.getDateZeroTime('1592494318');
dth.getDateZeroTime('1592494318856', true);
dth.getDateZeroTime('1970-01-01');  // A string in RFC2822 or ISO 8601 date format
dth.getDateZeroTime('1970-01-01T00:00:00.000Z');

dth.dateAdd($date, $days)

The dateAdd() method returns a Date Object of JavaScript.

Example:

const dth = require('datetime-helper');
dth.dateAdd(new Date(), 100);
dth.dateAdd(new Date(), -100);

dth.dateDiff($start_date, $end_date)

The dateDiff() method returns an Object of JavaScript.
when 'Invalid Date' then returns 'Invalid Start Date' or 'Invalid End Date'

Return an Object

// {
//    pof: boolean,  // pass or future, 
//                      false: $start_date >= $end_date,
//                      true $start_date < $end_date
//    val: integer (in sec), // the number of seconds between two date
//    days: string(float.toFix(2)),  // about how many days
//    day: integer, // specific days
//    hour: integer,  // specific hour
//    min: integer,  // specific min
//    sec: integer  // specific sec
// }

Example:

const dth = require('datetime-helper');
dth.dateDiff(new Date('1970-01-01'), new Date('1971-01-01'));
dth.dateDiff(Date.now() / 1000, new Date('1971-01-01'));
dth.dateDiff(1592494318, 1602494318);
dth.dateDiff('1592494318', '1582494318');

dth.format($date, $pattern = 'YYYY-MM-DD HH:mm:ss')

The format() method return format a Date instance to string.

Example:

const dth = require('datetime-helper');
dth.format(new Date());
dth.format(new Date(), 'YYYY/MM/DD HH/mm/ss/ms');
dth.format(new Date(), 'YYYY年MM年DD日HH小时mm分ss秒ms毫秒');
dth.format(new Date(), 'MM @ DD @ YYYY @ what the fun~~ HH ~~ mm ~~ ss ~~ ms');

Contributing

Please submit all issues and pull requests to the jkinfeng/datetime-helper repository!

Support

If you have any problem or suggestion please open an issue here.

License

MIT

1.0.0 / 2020-07-01

• rewrite code, not modify the date prototype of javascript

0.0.3 / ~

• not described in this