30 lines
932 B
JavaScript
30 lines
932 B
JavaScript
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import toDate from "../toDate/index.js";
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import requiredArgs from "../_lib/requiredArgs/index.js";
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/**
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* @name startOfQuarter
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* @category Quarter Helpers
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* @summary Return the start of a year quarter for the given date.
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*
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* @description
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* Return the start of a year quarter for the given date.
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* The result will be in the local timezone.
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*
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* @param {Date|Number} date - the original date
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* @returns {Date} the start of a quarter
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* @throws {TypeError} 1 argument required
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*
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* @example
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* // The start of a quarter for 2 September 2014 11:55:00:
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* const result = startOfQuarter(new Date(2014, 8, 2, 11, 55, 0))
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* //=> Tue Jul 01 2014 00:00:00
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*/
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export default function startOfQuarter(dirtyDate) {
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requiredArgs(1, arguments);
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var date = toDate(dirtyDate);
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var currentMonth = date.getMonth();
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var month = currentMonth - currentMonth % 3;
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date.setMonth(month, 1);
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date.setHours(0, 0, 0, 0);
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return date;
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}
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