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eufy-security-client-dz/node_modules/date-and-time/README.md
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# date-and-time
[![Circle CI](https://circleci.com/gh/knowledgecode/date-and-time.svg?style=shield)](https://circleci.com/gh/knowledgecode/date-and-time)
This JS library is just a collection of functions for manipulating date and time. It's small, simple, and easy to learn.
## Why
Nowadays, JS modules have become larger, more complex, and dependent on many other modules. It is important to strive for simplicity and smallness, especially for modules that are at the bottom of the dependency chain, such as those that handle date and time.
## Features
- Minimalist. Approximately 2k. (minified and gzipped)
- Extensible. Plugin system support.
- Multi language support.
- Universal / Isomorphic. Works anywhere.
- TypeScript support.
- Older browser support. Even works on IE6. :)
## Install
```shell
npm i date-and-time
```
## Recent Changes
- 3.6.0
- In `parseTZ()`, enabled parsing of the missing hour during the transition from standard time to daylight saving time into a Date type.
- In `format()` with the `z` token, fixed an issue where some short time zone names were incorrect.
- 3.5.0
- Added `addYearsTZ()`, `addMonthsTZ()`, and `addDaysTZ()` to the `timezone` plugin.
- Revised the approach to adding time and removed the third parameter from `addHours()`, `addMinutes()`, `addSeconds()`, and `addMilliseconds()`.
- 3.4.1
- Fixed an issue where `formatTZ()` would output 0:00 as 24:00 in 24-hour format in Node.js.
## Usage
- ES Modules:
```javascript
import date from 'date-and-time';
```
- CommonJS:
```javascript
const date = require('date-and-time');
```
- ES Modules for the browser:
```html
<script type="module">
import date from '/path/to/date-and-time.es.min.js';
</script>
```
- Older browser:
```html
<script src="/path/to/date-and-time.min.js">
// You will be able to access the global variable `date`.
</script>
```
### Note
- If you want to use ES Modules in Node.js without the transpiler, you need to add `"type": "module"` in your `package.json` or change your file extension from `.js` to `.mjs`.
- If you are using TypeScript and having trouble building, please ensure that the following settings in the `compilerOptions` of your `tsconfig.json` are set to `true`.
```json
{
"compilerOptions": {
"allowSyntheticDefaultImports": true,
"esModuleInterop": true
}
}
```
## API
- [format](#formatdateobj-arg-utc)
- Formatting date and time objects (Date -> String)
- [parse](#parsedatestring-arg-utc)
- Parsing date and time strings (String -> Date)
- [compile](#compileformatstring)
- Compiling format strings
- [preparse](#preparsedatestring-arg)
- Pre-parsing date and time strings
- [isValid](#isvalidarg1-arg2)
- Date and time string validation
- [transform](#transformdatestring-arg1-arg2-utc)
- Format transformation of date and time strings (String -> String)
- [addYears](#addyearsdateobj-years-utc)
- Adding years
- [addMonths](#addmonthsdateobj-months-utc)
- Adding months
- [addDays](#adddaysdateobj-days-utc)
- Adding days
- [addHours](#addhoursdateobj-hours)
- Adding hours
- [addMinutes](#addminutesdateobj-minutes)
- Adding minutes
- [addSeconds](#addsecondsdateobj-seconds)
- Adding seconds
- [addMilliseconds](#addmillisecondsdateobj-milliseconds)
- Adding milliseconds
- [subtract](#subtractdate1-date2)
- Subtracting two dates (date1 - date2)
- [isLeapYear](#isleapyeary)
- Whether a year is a leap year
- [isSameDay](#issamedaydate1-date2)
- Comparison of two dates
- [locale](#localelocale)
- Changing locales
- [extend](#extendextension)
- Functional extension
- [plugin](#pluginplugin)
- Importing plugins
### format(dateObj, arg[, utc])
- @param {**Date**} dateObj - A Date object
- @param {**string|Array.\<string\>**} arg - A format string or its compiled object
- @param {**boolean**} [utc] - Output as UTC
- @returns {**string**} A formatted string
```javascript
const now = new Date();
date.format(now, 'YYYY/MM/DD HH:mm:ss'); // => '2015/01/02 23:14:05'
date.format(now, 'ddd, MMM DD YYYY'); // => 'Fri, Jan 02 2015'
date.format(now, 'hh:mm A [GMT]Z'); // => '11:14 PM GMT-0800'
date.format(now, 'hh:mm A [GMT]Z', true); // => '07:14 AM GMT+0000'
const pattern = date.compile('ddd, MMM DD YYYY');
date.format(now, pattern); // => 'Fri, Jan 02 2015'
```
Available tokens and their meanings are as follows:
| token | meaning | examples of output |
|:------|:-------------------------------------|:-------------------|
| YYYY | four-digit year | 0999, 2015 |
| YY | two-digit year | 99, 01, 15 |
| Y | four-digit year without zero-padding | 2, 44, 888, 2015 |
| MMMM | month name (long) | January, December |
| MMM | month name (short) | Jan, Dec |
| MM | month with zero-padding | 01, 12 |
| M | month | 1, 12 |
| DD | date with zero-padding | 02, 31 |
| D | date | 2, 31 |
| dddd | day of week (long) | Friday, Sunday |
| ddd | day of week (short) | Fri, Sun |
| dd | day of week (very short) | Fr, Su |
| HH | 24-hour with zero-padding | 23, 08 |
| H | 24-hour | 23, 8 |
| hh | 12-hour with zero-padding | 11, 08 |
| h | 12-hour | 11, 8 |
| A | meridiem (uppercase) | AM, PM |
| mm | minute with zero-padding | 14, 07 |
| m | minute | 14, 7 |
| ss | second with zero-padding | 05, 10 |
| s | second | 5, 10 |
| SSS | millisecond (high accuracy) | 753, 022 |
| SS | millisecond (middle accuracy) | 75, 02 |
| S | millisecond (low accuracy) | 7, 0 |
| Z | time zone offset value | +0100, -0800 |
| ZZ | time zone offset value with colon | +01:00, -08:00 |
You can also use the following tokens by importing plugins. See [PLUGINS.md](./PLUGINS.md) for details.
| token | meaning | examples of output |
|:------|:-------------------------------------|:----------------------|
| DDD | ordinal notation of date | 1st, 2nd, 3rd |
| AA | meridiem (uppercase with ellipsis) | A.M., P.M. |
| a | meridiem (lowercase) | am, pm |
| aa | meridiem (lowercase with ellipsis) | a.m., p.m. |
| z | time zone name abbreviation | PST, EST |
| zz | time zone name | Pacific Standard Time |
#### Note 1. Comments
Parts of the given format string enclosed in square brackets are considered comments and are output as is, regardless of whether they are tokens or not.
```javascript
date.format(new Date(), 'DD-[MM]-YYYY'); // => '02-MM-2015'
date.format(new Date(), '[DD-[MM]-YYYY]'); // => 'DD-[MM]-YYYY'
```
#### Note 2. Output as UTC
This function outputs the date and time in the local time zone of the execution environment by default. If you want to output in UTC, set the UTC option (the third argument) to true. To output in any other time zone, you will need [a plugin](./PLUGINS.md).
```javascript
date.format(new Date(), 'hh:mm A [GMT]Z'); // => '11:14 PM GMT-0800'
date.format(new Date(), 'hh:mm A [GMT]Z', true); // => '07:14 AM GMT+0000'
```
#### Note 3. More Tokens
You can also define your own tokens. See [EXTEND.md](./EXTEND.md) for details.
### parse(dateString, arg[, utc])
- @param {**string**} dateString - A date and time string
- @param {**string|Array.\<string\>**} arg - A format string or its compiled object
- @param {**boolean**} [utc] - Input as UTC
- @returns {**Date**} A Date object
```javascript
date.parse('2015/01/02 23:14:05', 'YYYY/MM/DD HH:mm:ss'); // => Jan 2 2015 23:14:05 GMT-0800
date.parse('02-01-2015', 'DD-MM-YYYY'); // => Jan 2 2015 00:00:00 GMT-0800
date.parse('11:14:05 PM', 'hh:mm:ss A'); // => Jan 1 1970 23:14:05 GMT-0800
date.parse('11:14:05 PM', 'hh:mm:ss A', true); // => Jan 1 1970 23:14:05 GMT+0000 (Jan 1 1970 15:14:05 GMT-0800)
date.parse('23:14:05 GMT+0900', 'HH:mm:ss [GMT]Z'); // => Jan 1 1970 23:14:05 GMT+0900 (Jan 1 1970 06:14:05 GMT-0800)
date.parse('Jam 1 2017', 'MMM D YYYY'); // => Invalid Date
date.parse('Feb 29 2017', 'MMM D YYYY'); // => Invalid Date
```
Available tokens and their meanings are as follows:
| token | meaning | examples of acceptable form |
|:-------|:-------------------------------------|:----------------------------|
| YYYY | four-digit year | 0999, 2015 |
| Y | four-digit year without zero-padding | 2, 44, 88, 2015 |
| MMMM | month name (long) | January, December |
| MMM | month name (short) | Jan, Dec |
| MM | month with zero-padding | 01, 12 |
| M | month | 1, 12 |
| DD | date with zero-padding | 02, 31 |
| D | date | 2, 31 |
| HH | 24-hour with zero-padding | 23, 08 |
| H | 24-hour | 23, 8 |
| hh | 12-hour with zero-padding | 11, 08 |
| h | 12-hour | 11, 8 |
| A | meridiem (uppercase) | AM, PM |
| mm | minute with zero-padding | 14, 07 |
| m | minute | 14, 7 |
| ss | second with zero-padding | 05, 10 |
| s | second | 5, 10 |
| SSS | millisecond (high accuracy) | 753, 022 |
| SS | millisecond (middle accuracy) | 75, 02 |
| S | millisecond (low accuracy) | 7, 0 |
| Z | time zone offset value | +0100, -0800 |
| ZZ | time zone offset value with colon | +01:00, -08:00 |
You can also use the following tokens by importing plugins. See [PLUGINS.md](./PLUGINS.md) for details.
| token | meaning | examples of acceptable form |
|:-------|:-------------------------------------|:----------------------------|
| YY | two-digit year | 90, 00, 08, 19 |
| AA | meridiem (uppercase with ellipsis) | A.M., P.M. |
| a | meridiem (lowercase) | am, pm |
| aa | meridiem (lowercase with ellipsis) | a.m., p.m. |
| dddd | day of week (long) | Friday, Sunday |
| ddd | day of week (short) | Fri, Sun |
| dd | day of week (very short) | Fr, Su |
| SSSSSS | microsecond (high accuracy) | 123456, 000001 |
| SSSSS | microsecond (middle accuracy) | 12345, 00001 |
| SSSS | microsecond (low accuracy) | 1234, 0001 |
#### Note 1. Invalid Date
If this function fails to parse, it will return `Invalid Date`. Notice that the `Invalid Date` is a Date object, not `NaN` or `null`. You can tell whether the Date object is invalid as follows:
```javascript
const today = date.parse('Jam 1 2017', 'MMM D YYYY');
if (isNaN(today.getTime())) {
// Failure
}
```
#### Note 2. Input as UTC
This function uses the local time zone offset value of the execution environment by default if the given string does not contain a time zone offset value. To make it use UTC instead, set the UTC option (the third argument) to true. If you want it to use any other time zone, you will need [a plugin](./PLUGINS.md).
```javascript
date.parse('11:14:05 PM', 'hh:mm:ss A'); // => Jan 1 1970 23:14:05 GMT-0800
date.parse('11:14:05 PM', 'hh:mm:ss A', true); // => Jan 1 1970 23:14:05 GMT+0000 (Jan 1 1970 15:14:05 GMT-0800)
```
#### Note 3. Default Date Time
Default date is `January 1, 1970`, time is `00:00:00.000`. Values not passed will be complemented with them:
```javascript
date.parse('11:14:05 PM', 'hh:mm:ss A'); // => Jan 1 1970 23:14:05 GMT-0800
date.parse('Feb 2000', 'MMM YYYY'); // => Feb 1 2000 00:00:00 GMT-0800
```
#### Note 4. Max Date / Min Date
Parsable maximum date is `December 31, 9999`, minimum date is `January 1, 0001`.
```javascript
date.parse('Dec 31 9999', 'MMM D YYYY'); // => Dec 31 9999 00:00:00 GMT-0800
date.parse('Dec 31 10000', 'MMM D YYYY'); // => Invalid Date
date.parse('Jan 1 0001', 'MMM D YYYY'); // => Jan 1 0001 00:00:00 GMT-0800
date.parse('Jan 1 0000', 'MMM D YYYY'); // => Invalid Date
```
#### Note 5. 12-hour notation and Meridiem
If use `hh` or `h` (12-hour) token, use together `A` (meridiem) token to get the right value.
```javascript
date.parse('11:14:05', 'hh:mm:ss'); // => Jan 1 1970 11:14:05 GMT-0800
date.parse('11:14:05 PM', 'hh:mm:ss A'); // => Jan 1 1970 23:14:05 GMT-0800
```
#### Note 6. Token invalidation
Any part of the given format string that you do not want to be recognized as a token should be enclosed in square brackets. They are considered comments and will not be parsed.
```javascript
date.parse('12 hours 34 minutes', 'HH hours mm minutes'); // => Invalid Date
date.parse('12 hours 34 minutes', 'HH [hours] mm [minutes]'); // => Jan 1 1970 12:34:00 GMT-0800
```
#### Note 7. Wildcard
Whitespace acts as a wildcard token. This token will not parse the corresponding parts of the date and time strings. This behavior is similar to enclosing part of a format string in square brackets (Token invalidation), but with the flexibility that the contents do not have to match, as long as the number of characters in the corresponding parts match.
```javascript
// This will be an error.
date.parse('2015/01/02 11:14:05', 'YYYY/MM/DD'); // => Invalid Date
// Adjust the length of the format string by appending white spaces of the same length as a part to ignore to the end of it.
date.parse('2015/01/02 11:14:05', 'YYYY/MM/DD '); // => Jan 2 2015 00:00:00 GMT-0800
```
#### Note 8. Ellipsis
`...` token ignores subsequent corresponding date and time strings. Use this token only at the end of a format string. The above example can be also written like this:
```javascript
date.parse('2015/01/02 11:14:05', 'YYYY/MM/DD...'); // => Jan 2 2015 00:00:00 GMT-0800
```
### compile(formatString)
- @param {**string**} formatString - A format string
- @returns {**Array.\<string\>**} A compiled object
If you are going to execute the `format()`, the `parse()` or the `isValid()` so many times with one string format, recommended to precompile and reuse it for performance.
```javascript
const pattern = date.compile('MMM D YYYY h:m:s A');
date.parse('Mar 22 2019 2:54:21 PM', pattern);
date.parse('Jul 27 2019 4:15:24 AM', pattern);
date.parse('Dec 25 2019 3:51:11 AM', pattern);
date.format(new Date(), pattern); // => Mar 16 2020 6:24:56 PM
```
### preparse(dateString, arg)
- @param {**string**} dateString - A date and time string
- @param {**string|Array.\<string\>**} arg - A format string or its compiled object
- @returns {**Object**} A pre-parsed result object
This function takes exactly the same parameters with the `parse()`, but returns a date structure as follows unlike that:
```javascript
date.preparse('Fri Jan 2015 02 23:14:05 GMT-0800', ' MMM YYYY DD HH:mm:ss [GMT]Z');
{
Y: 2015, // Year
M: 1, // Month
D: 2, // Day
H: 23, // 24-hour
A: 0, // Meridiem
h: 0, // 12-hour
m: 14, // Minute
s: 5, // Second
S: 0, // Millisecond
Z: 480, // Timsezone offset
_index: 33, // Pointer offset
_length: 33, // Length of the date string
_match: 7 // Token matching count
}
```
This date structure provides a parsing result. You will be able to tell from it how the date string was parsed(, or why the parsing was failed).
### isValid(arg1[, arg2])
- @param {**Object|string**} arg1 - A pre-parsed result object or a date and time string
- @param {**string|Array.\<string\>**} [arg2] - A format string or its compiled object
- @returns {**boolean**} Whether the date and time string is a valid date and time
This function takes either exactly the same parameters with the `parse()` or a date structure which the `preparse()` returns, evaluates the validity of them.
```javascript
date.isValid('2015/01/02 23:14:05', 'YYYY/MM/DD HH:mm:ss'); // => true
date.isValid('29-02-2015', 'DD-MM-YYYY'); // => false
```
```javascript
const result = date.preparse('2015/01/02 23:14:05', 'YYYY/MM/DD HH:mm:ss');
date.isValid(result); // => true
```
### transform(dateString, arg1, arg2[, utc])
- @param {**string**} dateString - A date and time string
- @param {**string|Array.\<string\>**} arg1 - A format string or its compiled object before transformation
- @param {**string|Array.\<string\>**} arg2 - A format string or its compiled object after transformation
- @param {**boolean**} [utc] - Output as UTC
- @returns {**string**} A formatted string
This function transforms the format of a date string. The 2nd parameter, `arg1`, is the format string of it. Available token list is equal to the `parse()`'s. The 3rd parameter, `arg2`, is the transformed format string. Available token list is equal to the `format()`'s.
```javascript
// 3/8/2020 => 8/3/2020
date.transform('3/8/2020', 'D/M/YYYY', 'M/D/YYYY');
// 13:05 => 01:05 PM
date.transform('13:05', 'HH:mm', 'hh:mm A');
```
### addYears(dateObj, years[, utc])
- @param {**Date**} dateObj - A Date object
- @param {**number**} years - The number of years to add
- @param {**boolean**} [utc] - If true, calculates the date in UTC `Added in: v3.0.0`
- @returns {**Date**} The Date object after adding the specified number of years
Adds years to a date object. Subtraction is also possible by specifying a negative value. If the third parameter is false or omitted, this function calculates based on the system's default time zone. If you need to obtain calculation results based on a specific time zone regardless of the execution system, consider using the `addYearsTZ()`, which allows you to specify a time zone name as the third parameter. See [PLUGINS.md](./PLUGINS.md) for details.
```javascript
const now = new Date();
const next_year = date.addYears(now, 1);
```
Exceptional behavior of the calculation for the last day of the month:
```javascript
const now = new Date(Date.UTC(2020, 1, 29)); // => Feb 29 2020
const next_year = date.addYears(now, 1, true); // => Feb 28 2021
const next_next_year = date.addYears(next_year, 1, true); // => Feb 28 2022
```
### addMonths(dateObj, months[, utc])
- @param {**Date**} dateObj - A Date object
- @param {**number**} months - The number of months to add
- @param {**boolean**} [utc] - If true, calculates the date in UTC `Added in: v3.0.0`
- @returns {**Date**} The Date object after adding the specified number of months
Adds months to a date object. Subtraction is also possible by specifying a negative value. If the third parameter is false or omitted, this function calculates based on the system's default time zone. If you need to obtain calculation results based on a specific time zone regardless of the execution system, consider using the `addMonthsTZ()`, which allows you to specify a time zone name as the third parameter. See [PLUGINS.md](./PLUGINS.md) for details.
```javascript
const now = new Date();
const next_month = date.addMonths(now, 1);
```
Exceptional behavior of the calculation for the last day of the month:
```javascript
const now = new Date(Date.UTC(2023, 0, 31)); // => Jan 31 2023
const next_month = date.addMonths(now, 1, true); // => Feb 28 2023
const next_next_month = date.addMonths(next_month, 1, true); // => Mar 28 2023
```
### addDays(dateObj, days[, utc])
- @param {**Date**} dateObj - A Date object
- @param {**number**} days - The number of days to add
- @param {**boolean**} [utc] - If true, calculates the date in UTC `Added in: v3.0.0`
- @returns {**Date**} The Date object after adding the specified number of days
Adds days to a date object. Subtraction is also possible by specifying a negative value. If the third parameter is false or omitted, this function calculates based on the system's default time zone. If you need to obtain calculation results based on a specific time zone regardless of the execution system, consider using the `addDaysTZ()`, which allows you to specify a time zone name as the third parameter. See [PLUGINS.md](./PLUGINS.md) for details.
```javascript
const now = new Date();
const yesterday = date.addDays(now, -1);
```
### addHours(dateObj, hours)
- @param {**Date**} dateObj - A Date object
- @param {**number**} hours - The number of hours to add
- ~~@param {**boolean**} [utc] - If true, calculates the date in UTC `Added in: v3.0.0`~~ `Removed in: v3.5.0`
- @returns {**Date**} The Date object after adding the specified number of hours
Adds hours to a date object. Subtraction is also possible by specifying a negative value. The third parameter was deprecated in version 3.5.0. Regardless of what is specified for this parameter, the calculation results will not change.
```javascript
const now = new Date();
const an_hour_ago = date.addHours(now, -1);
```
### addMinutes(dateObj, minutes)
- @param {**Date**} dateObj - A Date object
- @param {**number**} minutes - The number of minutes to add
- ~~@param {**boolean**} [utc] - If true, calculates the date in UTC `Added in: v3.0.0`~~ `Removed in: v3.5.0`
- @returns {**Date**} The Date object after adding the specified number of minutes
Adds minutes to a date object. Subtraction is also possible by specifying a negative value. The third parameter was deprecated in version 3.5.0. Regardless of what is specified for this parameter, the calculation results will not change.
```javascript
const now = new Date();
const two_minutes_later = date.addMinutes(now, 2);
```
### addSeconds(dateObj, seconds)
- @param {**Date**} dateObj - A Date object
- @param {**number**} seconds - The number of seconds to add
- ~~@param {**boolean**} [utc] - If true, calculates the date in UTC `Added in: v3.0.0`~~ `Removed in: v3.5.0`
- @returns {**Date**} The Date object after adding the specified number of seconds
Adds seconds to a date object. Subtraction is also possible by specifying a negative value. The third parameter was deprecated in version 3.5.0. Regardless of what is specified for this parameter, the calculation results will not change.
```javascript
const now = new Date();
const three_seconds_ago = date.addSeconds(now, -3);
```
### addMilliseconds(dateObj, milliseconds)
- @param {**Date**} dateObj - A Date object
- @param {**number**} milliseconds - The number of milliseconds to add
- ~~@param {**boolean**} [utc] - If true, calculates the date in UTC `Added in: v3.0.0`~~ `Removed in: v3.5.0`
- @returns {**Date**} The Date object after adding the specified number of milliseconds
Adds milliseconds to a date object. Subtraction is also possible by specifying a negative value. The third parameter was deprecated in version 3.5.0. Regardless of what is specified for this parameter, the calculation results will not change.
```javascript
const now = new Date();
const a_millisecond_later = date.addMilliseconds(now, 1);
```
### subtract(date1, date2)
- @param {**Date**} date1 - A Date object
- @param {**Date**} date2 - A Date object
- @returns {**Object**} The result object of subtracting date2 from date1
```javascript
const today = new Date(2015, 0, 2);
const yesterday = new Date(2015, 0, 1);
date.subtract(today, yesterday).toDays(); // => 1 = today - yesterday
date.subtract(today, yesterday).toHours(); // => 24
date.subtract(today, yesterday).toMinutes(); // => 1440
date.subtract(today, yesterday).toSeconds(); // => 86400
date.subtract(today, yesterday).toMilliseconds(); // => 86400000
```
### isLeapYear(y)
- @param {**number**} y - A year to check
- @returns {**boolean**} Whether the year is a leap year
```javascript
date.isLeapYear(2015); // => false
date.isLeapYear(2012); // => true
```
### isSameDay(date1, date2)
- @param {**Date**} date1 - A Date object
- @param {**Date**} date2 - A Date object
- @returns {**boolean**} Whether the two dates are the same day (time is ignored)
```javascript
const date1 = new Date(2017, 0, 2, 0); // Jan 2 2017 00:00:00
const date2 = new Date(2017, 0, 2, 23, 59); // Jan 2 2017 23:59:00
const date3 = new Date(2017, 0, 1, 23, 59); // Jan 1 2017 23:59:00
date.isSameDay(date1, date2); // => true
date.isSameDay(date1, date3); // => false
```
### locale([locale])
- @param {**Function|string**} [locale] - A locale installer or language code
- @returns {**string**} The current language code
It returns the current language code if called without any parameters.
```javascript
date.locale(); // => "en"
```
To switch to any other language, call it with a locale installer or a language code.
```javascript
import es from 'date-and-time/locale/es';
date.locale(es); // Switch to Spanish
```
See [LOCALE.md](./LOCALE.md) for details.
### extend(extension)
- @param {**Object**} extension - An extension object
- @returns {**void**}
It extends this library. See [EXTEND.md](./EXTEND.md) for details.
### plugin(plugin)
- @param {**Function|string**} plugin - A plugin installer or plugin name
- @returns {**void**}
Plugin is a named extension object. By installing predefined plugins, you can easily extend this library. See [PLUGINS.md](./PLUGINS.md) for details.
## Browser Support
Chrome, Firefox, Safari, Edge, and Internet Explorer 6+.
## License
MIT
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