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- import toInteger from "../_lib/toInteger/index.js";
- import addQuarters from "../addQuarters/index.js";
- import requiredArgs from "../_lib/requiredArgs/index.js";
- /**
- * @name subQuarters
- * @category Quarter Helpers
- * @summary Subtract the specified number of year quarters from the given date.
- *
- * @description
- * Subtract the specified number of year quarters from the given date.
- *
- * @param {Date|Number} date - the date to be changed
- * @param {Number} amount - the amount of quarters to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
- * @returns {Date} the new date with the quarters subtracted
- * @throws {TypeError} 2 arguments required
- *
- * @example
- * // Subtract 3 quarters from 1 September 2014:
- * const result = subQuarters(new Date(2014, 8, 1), 3)
- * //=> Sun Dec 01 2013 00:00:00
- */
- export default function subQuarters(dirtyDate, dirtyAmount) {
- requiredArgs(2, arguments);
- var amount = toInteger(dirtyAmount);
- return addQuarters(dirtyDate, -amount);
- }
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