27 lines
1.0 KiB
JavaScript
27 lines
1.0 KiB
JavaScript
import toInteger from "../_lib/toInteger/index.js";
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import addMonths from "../addMonths/index.js";
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import requiredArgs from "../_lib/requiredArgs/index.js";
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/**
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* @name subMonths
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* @category Month Helpers
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* @summary Subtract the specified number of months from the given date.
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*
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* @description
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* Subtract the specified number of months from the given date.
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*
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* @param {Date|Number} date - the date to be changed
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* @param {Number} amount - the amount of months to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
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* @returns {Date} the new date with the months subtracted
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* @throws {TypeError} 2 arguments required
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*
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* @example
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* // Subtract 5 months from 1 February 2015:
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* const result = subMonths(new Date(2015, 1, 1), 5)
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* //=> Mon Sep 01 2014 00:00:00
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*/
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export default function subMonths(dirtyDate, dirtyAmount) {
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requiredArgs(2, arguments);
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var amount = toInteger(dirtyAmount);
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return addMonths(dirtyDate, -amount);
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} |