59 lines
1.5 KiB
JavaScript
59 lines
1.5 KiB
JavaScript
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import { daysInYear } from "./constants.mjs";
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/**
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* @name milliseconds
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* @category Millisecond Helpers
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* @summary
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* Returns the number of milliseconds in the specified, years, months, weeks, days, hours, minutes and seconds.
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*
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* @description
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* Returns the number of milliseconds in the specified, years, months, weeks, days, hours, minutes and seconds.
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*
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* One years equals 365.2425 days according to the formula:
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*
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* > Leap year occures every 4 years, except for years that are divisable by 100 and not divisable by 400.
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* > 1 mean year = (365+1/4-1/100+1/400) days = 365.2425 days
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*
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* One month is a year divided by 12.
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*
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* @param duration - The object with years, months, weeks, days, hours, minutes and seconds to be added.
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*
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* @returns The milliseconds
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*
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* @example
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* // 1 year in milliseconds
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* milliseconds({ years: 1 })
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* //=> 31556952000
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*
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* // 3 months in milliseconds
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* milliseconds({ months: 3 })
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* //=> 7889238000
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*/
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export function milliseconds({
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years,
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months,
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weeks,
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days,
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hours,
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minutes,
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seconds,
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}) {
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let totalDays = 0;
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if (years) totalDays += years * daysInYear;
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if (months) totalDays += months * (daysInYear / 12);
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if (weeks) totalDays += weeks * 7;
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if (days) totalDays += days;
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let totalSeconds = totalDays * 24 * 60 * 60;
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if (hours) totalSeconds += hours * 60 * 60;
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if (minutes) totalSeconds += minutes * 60;
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if (seconds) totalSeconds += seconds;
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return Math.trunc(totalSeconds * 1000);
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}
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// Fallback for modularized imports:
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export default milliseconds;
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