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天文台pc/tianwentai-ui/node_modules/date-fns/startOfQuarter.js 1019 Bytes
bc518174   王天杨   提交两个项目文件
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  "use strict";
  exports.startOfQuarter = startOfQuarter;
  var _index = require("./toDate.js");
  
  /**
   * @name startOfQuarter
   * @category Quarter Helpers
   * @summary Return the start of a year quarter for the given date.
   *
   * @description
   * Return the start of a year quarter for the given date.
   * The result will be in the local timezone.
   *
   * @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).
   *
   * @param date - The original date
   *
   * @returns The start of a quarter
   *
   * @example
   * // The start of a quarter for 2 September 2014 11:55:00:
   * const result = startOfQuarter(new Date(2014, 8, 2, 11, 55, 0))
   * //=> Tue Jul 01 2014 00:00:00
   */
  function startOfQuarter(date) {
    const _date = (0, _index.toDate)(date);
    const currentMonth = _date.getMonth();
    const month = currentMonth - (currentMonth % 3);
    _date.setMonth(month, 1);
    _date.setHours(0, 0, 0, 0);
    return _date;
  }