41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
|
"use strict";
|
||
|
|
|
||
|
|
Object.defineProperty(exports, "__esModule", {
|
||
|
|
value: true
|
||
|
|
});
|
||
|
|
exports.default = startOfDecade;
|
||
|
|
|
||
|
|
var _index = _interopRequireDefault(require("../toDate/index.js"));
|
||
|
|
|
||
|
|
var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
|
||
|
|
|
||
|
|
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @name startOfDecade
|
||
|
|
* @category Decade Helpers
|
||
|
|
* @summary Return the start of a decade for the given date.
|
||
|
|
*
|
||
|
|
* @description
|
||
|
|
* Return the start of a decade for the given date.
|
||
|
|
*
|
||
|
|
* @param {Date|Number} date - the original date
|
||
|
|
* @returns {Date} the start of a decade
|
||
|
|
* @throws {TypeError} 1 argument required
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // The start of a decade for 21 October 2015 00:00:00:
|
||
|
|
* const result = startOfDecade(new Date(2015, 9, 21, 00, 00, 00))
|
||
|
|
* //=> Jan 01 2010 00:00:00
|
||
|
|
*/
|
||
|
|
function startOfDecade(dirtyDate) {
|
||
|
|
(0, _index2.default)(1, arguments);
|
||
|
|
var date = (0, _index.default)(dirtyDate);
|
||
|
|
var year = date.getFullYear();
|
||
|
|
var decade = Math.floor(year / 10) * 10;
|
||
|
|
date.setFullYear(decade, 0, 1);
|
||
|
|
date.setHours(0, 0, 0, 0);
|
||
|
|
return date;
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = exports.default;
|