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14 lines
650 B
14 lines
650 B
3 years ago
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import getUTCISOWeekYear from '../getUTCISOWeekYear/index.js';
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import startOfUTCISOWeek from '../startOfUTCISOWeek/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 startOfUTCISOWeekYear(dirtyDate) {
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requiredArgs(1, arguments);
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var year = getUTCISOWeekYear(dirtyDate);
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var fourthOfJanuary = new Date(0);
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fourthOfJanuary.setUTCFullYear(year, 0, 4);
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fourthOfJanuary.setUTCHours(0, 0, 0, 0);
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var date = startOfUTCISOWeek(fourthOfJanuary);
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return date;
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}
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