bc518174
 王天杨
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"use strict";
exports.constructFrom = constructFrom;
/**
* @name constructFrom
* @category Generic Helpers
* @summary Constructs a date using the reference date and the value
*
* @description
* The function constructs a new date using the constructor from the reference
* date and the given value. It helps to build generic functions that accept
* date extensions.
*
* It defaults to `Date` if the passed reference date is a number or a string.
*
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
*
* @param date - The reference date to take constructor from
* @param value - The value to create the date
*
* @returns Date initialized using the given date and value
*
* @example
* import { constructFrom } from 'date-fns'
*
* // A function that clones a date preserving the original type
* function cloneDate<DateType extends Date(date: DateType): DateType {
* return constructFrom(
* date, // Use contrustor from the given date
* date.getTime() // Use the date value to create a new date
* )
* }
*/
function constructFrom(date, value) {
if (date instanceof Date) {
return new date.constructor(value);
} else {
return new Date(value);
}
}
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