| 1 | ;
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| 2 | exports.previousDay = previousDay;
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| 3 | var _index = require("./getDay.js");
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| 4 | var _index2 = require("./subDays.js");
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| 5 |
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| 6 | /**
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| 7 | * @name previousDay
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| 8 | * @category Weekday Helpers
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| 9 | * @summary When is the previous day of the week?
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| 10 | *
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| 11 | * @description
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| 12 | * When is the previous day of the week? 0-6 the day of the week, 0 represents Sunday.
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| 13 | *
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| 14 | * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
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| 15 | *
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| 16 | * @param date - The date to check
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| 17 | * @param day - The day of the week
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| 18 | *
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| 19 | * @returns The date is the previous day of week
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| 20 | *
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| 21 | * @example
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| 22 | * // When is the previous Monday before Mar, 20, 2020?
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| 23 | * const result = previousDay(new Date(2020, 2, 20), 1)
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| 24 | * //=> Mon Mar 16 2020 00:00:00
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| 25 | *
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| 26 | * @example
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| 27 | * // When is the previous Tuesday before Mar, 21, 2020?
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| 28 | * const result = previousDay(new Date(2020, 2, 21), 2)
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| 29 | * //=> Tue Mar 17 2020 00:00:00
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| 30 | */
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| 31 | function previousDay(date, day) {
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| 32 | let delta = (0, _index.getDay)(date) - day;
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| 33 | if (delta <= 0) delta += 7;
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| 34 |
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| 35 | return (0, _index2.subDays)(date, delta);
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| 36 | }
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