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14 lines
573 B
14 lines
573 B
import toDate from "../../toDate/index.js";
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import requiredArgs from "../requiredArgs/index.js"; // This function will be a part of public API when UTC function will be implemented.
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// See issue: https://github.com/date-fns/date-fns/issues/376
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export default function startOfUTCISOWeek(dirtyDate) {
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requiredArgs(1, arguments);
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var weekStartsOn = 1;
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var date = toDate(dirtyDate);
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var day = date.getUTCDay();
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var diff = (day < weekStartsOn ? 7 : 0) + day - weekStartsOn;
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date.setUTCDate(date.getUTCDate() - diff);
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date.setUTCHours(0, 0, 0, 0);
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return date;
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} |