15 lines
408 B
TypeScript
15 lines
408 B
TypeScript
import { strict as assert } from 'assert';
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const millisInAnHour = 60 * 60 * 1000;
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const serverTimezone = -new Date().getTimezoneOffset() / 60;
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export default function timezone(date, timezone = serverTimezone) {
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if (typeof date === 'string') {
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date = new Date(date);
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}
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assert(date instanceof Date);
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return new Date(date.getTime() - millisInAnHour * (timezone - serverTimezone));
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}
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