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					65 lines
				
				2.0 KiB
			
		
		
			
		
	
	
					65 lines
				
				2.0 KiB
			| 
											3 years ago
										 | import toDate from '../toDate/index.js'; | ||
|  | import requiredArgs from '../_lib/requiredArgs/index.js'; | ||
|  | /** | ||
|  |  * @name max | ||
|  |  * @category Common Helpers | ||
|  |  * @summary Return the latest of the given dates. | ||
|  |  * | ||
|  |  * @description | ||
|  |  * Return the latest of the given dates. | ||
|  |  * | ||
|  |  * ### v2.0.0 breaking changes: | ||
|  |  * | ||
|  |  * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 | ||
|  |  * | ||
|  |  * - `max` function now accepts an array of dates rather than spread arguments. | ||
|  |  * | ||
|  |  *   ```javascript
 | ||
|  |  *   // Before v2.0.0
 | ||
|  |  *   var date1 = new Date(1989, 6, 10) | ||
|  |  *   var date2 = new Date(1987, 1, 11) | ||
|  |  *   var maxDate = max(date1, date2) | ||
|  |  * | ||
|  |  *   // v2.0.0 onward:
 | ||
|  |  *   var dates = [new Date(1989, 6, 10), new Date(1987, 1, 11)] | ||
|  |  *   var maxDate = max(dates) | ||
|  |  *   ```
 | ||
|  |  * | ||
|  |  * @param {Date[]|Number[]} datesArray - the dates to compare | ||
|  |  * @returns {Date} the latest of the dates | ||
|  |  * @throws {TypeError} 1 argument required | ||
|  |  * | ||
|  |  * @example | ||
|  |  * // Which of these dates is the latest?
 | ||
|  |  * var result = max([ | ||
|  |  *   new Date(1989, 6, 10), | ||
|  |  *   new Date(1987, 1, 11), | ||
|  |  *   new Date(1995, 6, 2), | ||
|  |  *   new Date(1990, 0, 1) | ||
|  |  * ]) | ||
|  |  * //=> Sun Jul 02 1995 00:00:00
 | ||
|  |  */ | ||
|  | 
 | ||
|  | export default function max(dirtyDatesArray) { | ||
|  |   requiredArgs(1, arguments); | ||
|  |   var datesArray; // `dirtyDatesArray` is Array, Set or Map, or object with custom `forEach` method
 | ||
|  | 
 | ||
|  |   if (dirtyDatesArray && typeof dirtyDatesArray.forEach === 'function') { | ||
|  |     datesArray = dirtyDatesArray; // If `dirtyDatesArray` is Array-like Object, convert to Array.
 | ||
|  |   } else if (typeof dirtyDatesArray === 'object' && dirtyDatesArray !== null) { | ||
|  |     datesArray = Array.prototype.slice.call(dirtyDatesArray); | ||
|  |   } else { | ||
|  |     // `dirtyDatesArray` is non-iterable, return Invalid Date
 | ||
|  |     return new Date(NaN); | ||
|  |   } | ||
|  | 
 | ||
|  |   var result; | ||
|  |   datesArray.forEach(function (dirtyDate) { | ||
|  |     var currentDate = toDate(dirtyDate); | ||
|  | 
 | ||
|  |     if (result === undefined || result < currentDate || isNaN(currentDate)) { | ||
|  |       result = currentDate; | ||
|  |     } | ||
|  |   }); | ||
|  |   return result || new Date(NaN); | ||
|  | } |