Get a valid list of years down to seconds for a date and min and max date.
You ever wanted to create a simple date time picker or wanted to show the user available dates or only the days?
It is a zero dependecy lib for browser and node environments.
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npm install datetime-periodsyarn add datetime-periods
If you want to use datetime-periods via script tag, you should use the datetime-periods.umd.js. After the script is loaded you can access the methods through the global datetimePeriods.
<html>
<head>
<script src="../lib/datetime-periods.umd.js"></script>
<script>
// functions are stored globally on the window object
console.log('window.datetimePeriods:', window.datetimePeriods)
</script>
</head>
<body>
</body>
</html>Just import the methods you need from the package.
import { getDateTimeObject } from 'datetime-periods'
import * as dateTimePeriods from 'datetime-periods'Just require the methods you need from the package.
const getDateTimeObject = require('datetime-periods').getDateTimeObject
const dateTimePeriods = require('datetime-periods')Some simple and easy to use examples can be found in the example folder in the repo.
There is also a plain JavaScript example page.
Or use RunKit to try it out!
Transforms a date in an object respresentation.
Result value:
// DateTimeObject interface
{
year: number
month: number // (1-12)
day: number
hour: number
minute: number
second: number
tzOffset: number
}Example:
import { getDateTimeObject } from 'datetime-periods'
const dateTimeObject = getDateTimeObject(new Date())
console.log(dateTimeObject)Output:
{
"day": 14,
"hour": 13,
"minute": 15,
"month": 3,
"second": 15,
"tzOffset": -60,
"year": 2019
}Returns the day count of a month and year. The month is based on numbers from 1 (january) to 12 (december).
Example:
import { getDaysInMonth } from 'datetime-periods'
const daysInFebruary2019 = getDaysInMonth(2, 2019)
console.log(daysInFebruary2019)Output:
28getDateTimePeriods(value: Date, min: Date (optional), max: Date (optional), needed: NeededPeriods (optional))
This method contains the main functionality of the lib. The other methods are only internally used, but maybe someone finds them useful :).
It generates a data structure of valid years, months, days, hours, minutes and seconds for a given date and an optional min and max date. In addition to that it returns all the calculation dates as object representation.
If only some period values are interesting, it is possible to only retrieve, years, months, ... . Therefore use the needed parameter and pass an object of the values you do not need. This periods keys will be an empty array.
getDateTimePeriods(new Date(), undefined, undefined, {
days: false
years: false
})Result value
{
value: DateTimeObject // validated value as object
originalValue: DateTimeObject // original value as object
originalValueChanged: boolean // indicator if original has changed
max: DateTimeObject // max date as object
min: DateTimeObject // min date as object
periods: {
days: number[] // available days
hours: number[] // available hours
minutes: number[] // available minutes
months: number[] // available months
seconds: number[] // available seconds
years: number[] // available years
}
}Example:
import { getDateTimePeriods } from 'datetime-periods'
const value = new Date()
const min = new Date()
min.setFullYear(value.getFullYear() - 5)
const max = new Date()
max.setFullYear(value.getFullYear() + 5)
const result = getDateTimePeriods(value, min, max)
console.log(result)Output:
{
"value": {
"year": 2019,
"month": 3,
"day": 14,
"hour": 14,
"minute": 40,
"second": 21,
"tzOffset": -60
},
"originalValue": {
"year": 2019,
"month": 3,
"day": 14,
"hour": 14,
"minute": 40,
"second": 21,
"tzOffset": -60
},
"originalValueChanged": false,
"max": {
"year": 2024,
"month": 1,
"day": 1,
"hour": 1,
"minute": 0,
"second": 2,
"tzOffset": -60
},
"min": {
"year": 2014,
"month": 3,
"day": 14,
"hour": 14,
"minute": 40,
"second": 21,
"tzOffset": -60
},
"periods": {
"days": [
1,
2,
3,
...
28,
29,
30,
31
],
"hours": [
0,
1,
2,
...
21,
22,
23
],
"minutes": [
0,
1,
2,
3,
...
56,
57,
58,
59
],
"months": [
1,
2,
3,
...
10,
11,
12
],
"seconds": [
0,
1,
2,
...
57,
58,
59
],
"years": [
2014,
2015,
2016,
...
2022,
2023,
2024
]
}
}- min:
value - 100 years - max:
value + 100 years
Leading to a console.warn!
min > max: min and max are fall back to the defaultvalue < min: value is set to min, setsoriginalValueChangedtotruevalue > max: value is set to max, setsoriginalValueChangedtotrue