date-fns/src/endOfYesterday/index.ts


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/**
 * @name endOfYesterday
 * @category Day Helpers
 * @summary Return the end of yesterday.
 * @pure false
 *
 * @description
 * Return the end of yesterday.
 *
 * > ⚠️ Please note that this function is not present in the FP submodule as
 * > it uses `new Date()` internally hence impure and can't be safely curried.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @returns {Date} the end of yesterday
 *
 * @example
 * // If today is 6 October 2014:
 * const result = endOfYesterday()
 * //=> Sun Oct 5 2014 23:59:59.999
 */
export default function endOfYesterday(): Date {
  const now = new Date()
  const year = now.getFullYear()
  const month = now.getMonth()
  const day = now.getDate()

  const date = new Date(0)
  date.setFullYear(year, month, day - 1)
  date.setHours(23, 59, 59, 999)
  return date
}